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24.1.3. Check Geometry

24.1.3.1. Dangle-end lines 

Added in 3.42

Detects dangle-end lines in line geometries and reports them as errors. A dangle-end line is a line feature that terminates at a vertex connected to only one segment, resulting in an endpoint without a proper connection.

../../../../_images/check_geometry_dangleendlines.png — Fig. 24.2 Identifying dangle-end features (in red) and vertices (yellow).

Parametri

Parametri di base

Etichetta	Nome	Tipo	Descrizione
Layer in ingresso	`INPUT`	[vector: line]	Layer with the geometries to check.
Unique feature identifier	`UNIQUE_ID`	[tablefield: any]	Field storing unique values for feature identification.
Dangle-end errors	`ERRORS`	[vector: point] Predefinito: `[Create temporary layer]`	Specification of the output layer containing the errors location. One of: Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.
Dangle-end features Opzionale	`OUTPUT`	[vector: line] Predefinito: `[Skip output]`	Line layer containing the identified dangle-end line features. One of: Tralascia risultato Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.

Parametri avanzati

Etichetta

Nome

Tipo

Descrizione

Tolleranza

TOLERANCE

[numeric: integer]

Predefinito: 8

Numerical precision of geometric operations, given as an integer n, meaning that two vertices less than 10^-n apart (in map units) are considered to be merged.

In uscita:

Etichetta

Nome

Tipo

Descrizione

Dangle-end errors

ERRORS

[vector: point]

Output point layer representing the error locations and information. The output layer contains the following fields:

gc_layerid: the ID of the input layer.
gc_layername: the name of the input layer.
gc_partidx: the index of the feature’s geometry part containing the dangle-end.
gc_ringidx: the index of the feature’s geometry ring containing the dangle-end.
gc_vertidx: the vertex index of the dangle-end in the feature’s geometry ring.
gc_errorx: the x coordinate of the dangle-end.
gc_errory: the y coordinate of the dangle-end.
gc_error
UNIQUE_ID field: the unique ID of the input feature with the dangle-end.

Dangle-end features

OUTPUT

[vector: line]

Output line layer containing the input dangle-end features. If no dangle-end features are found, the output layer will be empty. Available fields are the same as in the ERRORS output.

Codice Python

Algorithm ID: native:checkgeometrydangle

import processing
processing.run("algorithm_id", {parameter_dictionary})

L” id dell’algoritmo viene visualizzato quando si passa il mouse sull’algoritmo nella finestra degli strumenti di elaborazione. Il dizionario dei parametri fornisce i Nomi e i valori dei parametri. Vedi Usare gli algoritmi di Processing dalla console dei comandi per dettagli su come eseguire algoritmi di elaborazione dalla console Python.

24.1.3.2. Degenerate polygons 

Added in 3.42

Checks the polygons with less than 3 points, which are degenerate polygons. Degenerate polygons are errors.

Nota

This algorithm detects invalid polygon geometries (degenerate polygons). To ensure these invalid features are not filtered out before processing, open ^{Advanced options} next to the Input layer and set Invalid feature filtering to Do not Filter (Better Performance).

Parametri

Parametri di base

Etichetta	Nome	Tipo	Descrizione
Layer in ingresso	`INPUT`	[vector: polygon]	Layer with the geometries to check.
Unique feature identifier	`UNIQUE_ID`	[tablefield: any]	Field storing unique values for feature identification.
Degenerate polygons errors	`ERRORS`	[vector: point] Predefinito: `[Create temporary layer]`	Specification of the output layer containing the centroid of the degenerate polygons. One of: Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.
Degenerate polygons features Opzionale	`OUTPUT`	[vector: polygon] Predefinito: `[Skip output]`	Specification of the output layer containing the degenerate polygons. One of: Tralascia risultato Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.

Parametri avanzati

Etichetta

Nome

Tipo

Descrizione

Tolleranza

TOLERANCE

[numeric: integer]

Predefinito: 8

Numerical precision of geometric operations, given as an integer n, meaning that two vertices less than 10^-n apart (in map units) are considered to be merged.

In uscita:

Etichetta

Nome

Tipo

Descrizione

Degenerate polygons errors

ERRORS

[vector: point]

Output point layer representing the error locations and information. The output layer contains the following fields:

gc_layerid: the ID of the input layer.
gc_layername: the name of the input layer.
gc_partidx: the index of the geometry part of the degenerate polygon.
gc_ringidx: the index of the ring of the degenerate polygon.
gc_vertidx
gc_errorx: the x coordinate of the centroid of the degenerate polygon
gc_errory: the y coordinate of the centroid of the degenerate polygon
gc_error
UNIQUE_ID field: the unique ID of the input feature that is degenerate.

Degenerate polygons features

OUTPUT

[vector: polygon]

Output polygon layer with features containing the degenerate polygons. If no degenerate polygon features are found, the output layer will be empty. Available fields are the same as in the ERRORS output.

Codice Python

Algorithm ID: native:checkgeometrydegeneratepolygon

import processing
processing.run("algorithm_id", {parameter_dictionary})

L” id dell’algoritmo viene visualizzato quando si passa il mouse sull’algoritmo nella finestra degli strumenti di elaborazione. Il dizionario dei parametri fornisce i Nomi e i valori dei parametri. Vedi Usare gli algoritmi di Processing dalla console dei comandi per dettagli su come eseguire algoritmi di elaborazione dalla console Python.

24.1.3.3. Duplicated geometries 

Added in 3.42

Checks for duplicated geometries in a vector layer, and reports them as errors.

Parametri

Parametri di base

Etichetta	Nome	Tipo	Descrizione
Layer in ingresso	`INPUT`	[vector: geometry]	Layer with the geometries to check
Unique feature identifier	`UNIQUE_ID`	[tablefield: any]	Field storing unique values for feature identification
Duplicate geometries errors	`ERRORS`	[vector: point] Predefinito: `[Create temporary layer]`	Specification of the output layer containing the errors location. One of: Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.
Duplicate geometries Opzionale	`OUTPUT`	[vector: same as input] Predefinito: `[Skip output]`	Specification of the output layer containing the geometries that were found to be duplicated. One of: Tralascia risultato Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.

Parametri avanzati

Etichetta

Nome

Tipo

Descrizione

Tolleranza

TOLERANCE

[numeric: integer]

Predefinito: 8

Numerical precision of geometric operations, given as an integer n, meaning that two vertices less than 10^-n apart (in map units) are considered to be merged.

In uscita:

Etichetta

Nome

Tipo

Descrizione

Duplicate geometries errors

ERRORS

[vector: point]

Output point layer representing the error locations and information. The output layer contains the following fields:

gc_layerid: the ID of the input layer.
gc_layername: the name of the input layer.
gc_partidx
gc_ringidx
gc_vertidx
gc_errorx: the x coordinate of the centroid of the duplicate geometry.
gc_errory: the y coordinate of the centroid of the duplicate geometry.
gc_error: the indices of the duplicate geometry (all except the highest index).
UNIQUE_ID field: the unique ID of the input feature that is a duplicate.

Duplicate geometries

OUTPUT

[vector: same as input]

Output layer containing the geometries that were found to be duplicated. Available fields are the same as in the ERRORS output.

Codice Python

Algorithm ID: native:checkgeometryduplicate

import processing
processing.run("algorithm_id", {parameter_dictionary})

L” id dell’algoritmo viene visualizzato quando si passa il mouse sull’algoritmo nella finestra degli strumenti di elaborazione. Il dizionario dei parametri fornisce i Nomi e i valori dei parametri. Vedi Usare gli algoritmi di Processing dalla console dei comandi per dettagli su come eseguire algoritmi di elaborazione dalla console Python.

24.1.3.4. Duplicated vertices 

Added in 3.42

Checks for duplicated vertices in line or polygon geometries, and reports them as errors.

Vedi anche

Delete duplicated vertices, Rimuovi vertici duplicati

Parametri

Parametri di base

Etichetta	Nome	Tipo	Descrizione
Layer in ingresso	`INPUT`	[vector: line, polygon]	Layer with the geometries to check
Unique feature identifier	`UNIQUE_ID`	[tablefield: any]	Field storing unique values for feature identification
Duplicated vertices errors	`ERRORS`	[vector: point] Predefinito: `[Create temporary layer]`	Specification of the output layer containing the errors location. One of: Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.
Duplicated vertices features Opzionale	`OUTPUT`	[vector: same as input] Predefinito: `[Skip output]`	Specification of the output layer containing the features with duplicated vertices. One of: Tralascia risultato Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.

Parametri avanzati

Etichetta

Nome

Tipo

Descrizione

Tolleranza

TOLERANCE

[numeric: integer]

Predefinito: 8

Numerical precision of geometric operations, given as an integer n, meaning that two vertices less than 10^-n apart (in map units) are considered to be merged.

In uscita:

Etichetta

Nome

Tipo

Descrizione

Duplicated vertices errors

ERRORS

[vector: point]

Output point layer representing the error locations and information. The output layer contains the following fields:

gc_layerid: the ID of the input layer.
gc_layername: the name of the input layer.
gc_partidx: the index of the feature’s geometry part containing the duplicate vertex.
gc_ringidx: the index of the feature’s geometry ring containing the duplicate vertex.
gc_vertidx: the index of the duplicate vertex in the feature’s geometry ring.
gc_errorx: the x coordinate of the duplicate vertex.
gc_errory: the y coordinate of the duplicate vertex.
gc_error
UNIQUE_ID field: the unique ID of the input feature that has duplicate vertices.

Duplicated vertices features

OUTPUT

[vector: same as input]

Output layer containing the features with duplicated vertices. Available fields are the same as in the ERRORS output.

Codice Python

Algorithm ID: native:checkgeometryduplicatenodes

import processing
processing.run("algorithm_id", {parameter_dictionary})

L” id dell’algoritmo viene visualizzato quando si passa il mouse sull’algoritmo nella finestra degli strumenti di elaborazione. Il dizionario dei parametri fornisce i Nomi e i valori dei parametri. Vedi Usare gli algoritmi di Processing dalla console dei comandi per dettagli su come eseguire algoritmi di elaborazione dalla console Python.

24.1.3.5. Features inside polygon 

Added in 3.42

Checks the input geometries contained in the polygons from the polygon layers list. A polygon layer can be checked against itself. Any contained features are reported as errors.

../../../../_images/check_geometry_featuresinsidepolygon.png — Fig. 24.3 Reporting errors on features inside a polygon.

Vedi anche

Eliminare elementi

Parametri

Parametri di base

Etichetta	Nome	Tipo	Descrizione
Layer in ingresso	`INPUT`	[vector: geometry]	Layer with the geometries to check.
Unique feature identifier	`UNIQUE_ID`	[tablefield: any]	Field storing unique values for feature identification.
Polygon layers	`POLYGONS`	[vector: polygon][list]	List of polygon layers to check against.
Errors from contained features	`ERRORS`	[vector: point] Predefinito: `[Create temporary layer]`	Point layer representing the contained features. One of: Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.
Contained features Opzionale	`OUTPUT`	[vector: same as input] Predefinito: `[Skip output]`	Specification of the output layer containing features within the checked polygons. One of: Tralascia risultato Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.

Parametri avanzati

Etichetta

Nome

Tipo

Descrizione

Tolleranza

TOLERANCE

[numeric: integer]

Predefinito: 8

Numerical precision of geometric operations, given as an integer n, meaning that two vertices less than 10^-n apart (in map units) are considered to be merged.

In uscita:

Etichetta

Nome

Tipo

Descrizione

Errors from contained features

ERRORS

[vector: point]

Output point layer representing the error locations and information. The output layer contains the following fields:

gc_layerid: the ID of the input layer.
gc_layername: the name of the input layer.
gc_partidx
gc_ringidx
gc_vertidx
gc_errorx: the x coordinate of the centroid of the contained feature.
gc_errory: the y coordinate of the centroid of the contained feature.
gc_error: the layer name and feature ID of a polygon that contains the feature.
UNIQUE_ID field: the unique ID of the input feature that is contained within another.

Contained features

OUTPUT

[vector: same as input]

Output layer containing features within the checked polygons. Available fields are the same as in the ERRORS output.

Codice Python

Algorithm ID: native:checkgeometrycontained

import processing
processing.run("algorithm_id", {parameter_dictionary})

L” id dell’algoritmo viene visualizzato quando si passa il mouse sull’algoritmo nella finestra degli strumenti di elaborazione. Il dizionario dei parametri fornisce i Nomi e i valori dei parametri. Vedi Usare gli algoritmi di Processing dalla console dei comandi per dettagli su come eseguire algoritmi di elaborazione dalla console Python.

24.1.3.6. Holes 

Added in 3.42

Detects holes in polygon geometries and reports them as errors.

../../../../_images/check_geometry_holes.png — Fig. 24.4 Reporting errors for holes on a polygon feature.

Vedi anche

Fill holes

Parametri

Parametri di base

Etichetta	Nome	Tipo	Descrizione
Layer in ingresso	`INPUT`	[vector: polygon]	Layer with the geometries to check
Unique feature identifier	`UNIQUE_ID`	[tablefield: any]	Field storing unique values for feature identification
Holes errors	`ERRORS`	[vector: point] Predefinito: `[Create temporary layer]`	Specification of the output layer containing the errors location. One of: Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.
Polygons with holes Opzionale	`OUTPUT`	[vector: polygon] Predefinito: `[Skip output]`	Polygon layer with the features containing holes. One of: Tralascia risultato Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.

Parametri avanzati

Etichetta

Nome

Tipo

Descrizione

Tolleranza

TOLERANCE

[numeric: integer]

Predefinito: 8

Numerical precision of geometric operations, given as an integer n, meaning that two vertices less than 10^-n apart (in map units) are considered to be merged.

In uscita:

Etichetta

Nome

Tipo

Descrizione

Holes errors

ERRORS

[vector: point]

Output point layer representing the error locations and information. The output layer contains the following fields:

gc_layerid: the ID of the input layer.
gc_layername: the name of the input layer.
gc_partidx: the index of the feature’s geometry part containing the hole.
gc_ringidx: the index of the feature’s geometry ring containing the hole.
gc_vertidx
gc_errorx: the x coordinate of the centroid of the hole.
gc_errory: the y coordinate of the centroid of the hole.
gc_error
UNIQUE_ID field: the unique ID of the input feature that has a hole.

Polygon with holes

OUTPUT

[vector: polygon]

Output polygon layer with features containing holes. If no holes are found, the output layer will be empty. Available fields are the same as in the ERRORS output.

Codice Python

Algorithm ID: native:checkgeometryhole

import processing
processing.run("algorithm_id", {parameter_dictionary})

L” id dell’algoritmo viene visualizzato quando si passa il mouse sull’algoritmo nella finestra degli strumenti di elaborazione. Il dizionario dei parametri fornisce i Nomi e i valori dei parametri. Vedi Usare gli algoritmi di Processing dalla console dei comandi per dettagli su come eseguire algoritmi di elaborazione dalla console Python.

24.1.3.7. Lines intersecting each other 

Added in 3.42

Checks intersections between line geometries within a layer. Intersections between two different lines are errors.

Vedi anche

Intersezione linee, Intersezione, Self-intersections

Parametri

Parametri di base

Etichetta	Nome	Tipo	Descrizione
Layer in ingresso	`INPUT`	[vector: line]	Layer with the geometries to check.
Unique feature identifier	`UNIQUE_ID`	[tablefield: any]	Field storing unique values for feature identification.
Intersection errors	`ERRORS`	[vector: point] Predefinito: `[Create temporary layer]`	Specification of the output layer containing the intersections location. One of: Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.
Intersecting feature Opzionale	`OUTPUT`	[vector: line] Predefinito: `[Skip output]`	Specification of the output layer for features intersecting each other. One of: Tralascia risultato Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.

Parametri avanzati

Etichetta

Nome

Tipo

Descrizione

Tolleranza

TOLERANCE

[numeric: integer]

Predefinito: 8

Numerical precision of geometric operations, given as an integer n, meaning that two vertices less than 10^-n apart (in map units) are considered to be merged.

In uscita:

Etichetta

Nome

Tipo

Descrizione

Intersection errors

ERRORS

[vector: point]

Output point layer representing the error locations and information. The output layer contains the following fields:

gc_layerid: the ID of the input layer.
gc_layername: the name of the input layer.
gc_partidx: the index of the feature’s geometry part where the intersection occurs.
gc_ringidx
gc_vertidx
gc_errorx: the x coordinate of the intersection point.
gc_errory: the y coordinate of the intersection point.
UNIQUE_ID field: the unique ID of an intersecting input feature.
gc_error: the layer name and index of the other intersecting feature.

Intersecting feature

OUTPUT

[vector: line]

Output layer containing, for each identified intersection, the feature (with same UNIQUE_ID value) it belongs to. If no intersections are found, the output layer will be empty. Available fields are the same as in the ERRORS output.

Codice Python

Algorithm ID: native:checkgeometrylineintersection

import processing
processing.run("algorithm_id", {parameter_dictionary})

L” id dell’algoritmo viene visualizzato quando si passa il mouse sull’algoritmo nella finestra degli strumenti di elaborazione. Il dizionario dei parametri fornisce i Nomi e i valori dei parametri. Vedi Usare gli algoritmi di Processing dalla console dei comandi per dettagli su come eseguire algoritmi di elaborazione dalla console Python.

24.1.3.8. Lines intersecting other layer 

Added in 3.42

Checks if the input line layer features intersect with the check layer features. An input feature that intersects with a check layer feature is an error.

Vedi anche

Intersezione linee, Intersezione, Self-intersections

Parametri

Parametri di base

Etichetta	Nome	Tipo	Descrizione
Layer in ingresso	`INPUT`	[vector: line]	Layer with the geometries to check.
Unique feature identifier	`UNIQUE_ID`	[tablefield: any]	Field storing unique values for feature identification.
Check layer	`CHECK_LAYER`	[vector: line, polygon]	Layer with the geometries to check against.
Line intersecting other layer errors	`ERRORS`	[vector: point] Predefinito: `[Create temporary layer]`	Specification of the output point layer containing the locations of intersection errors. One of: Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.
Line intersecting other layer features Opzionale	`OUTPUT`	[line] Predefinito: `[Skip output]`	Line layer with the input features that intersect features in the check layer. One of: Tralascia risultato Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.

Parametri avanzati

Etichetta

Nome

Tipo

Descrizione

Tolleranza

TOLERANCE

[numeric: integer]

Predefinito: 8

Numerical precision of geometric operations, given as an integer n, meaning that two vertices less than 10^-n apart (in map units) are considered to be merged.

In uscita:

Etichetta

Nome

Tipo

Descrizione

Line intersecting other layer errors

ERRORS

[vector: point]

Output point layer representing the error location and information. The output layer contains the following fields:

gc_layerid: the ID of the input layer.
gc_layername: the name of the input layer.
gc_partidx: the index of the feature’s geometry part where the intersection occurs.
gc_ringidx
gc_vertidx
gc_errorx: the x coordinate of the intersection point.
gc_errory: the y coordinate of the intersection point.
UNIQUE_ID field: the unique ID of the intersecting input feature.
gc_error: the index of the check layer where the intersection occurs.

Line intersecting other layer features

OUTPUT

[vector: line]

Output layer containing, for each identified intersection, the input feature it belongs to. If no intersections are found, the output layer will be empty. Available fields are the same as in the ERRORS output.

Codice Python

Algorithm ID: native:checkgeometrylinelayerintersection

import processing
processing.run("algorithm_id", {parameter_dictionary})

L” id dell’algoritmo viene visualizzato quando si passa il mouse sull’algoritmo nella finestra degli strumenti di elaborazione. Il dizionario dei parametri fornisce i Nomi e i valori dei parametri. Vedi Usare gli algoritmi di Processing dalla console dei comandi per dettagli su come eseguire algoritmi di elaborazione dalla console Python.

24.1.3.9. Missing vertices along borders 

Added in 3.42

Checks for missing vertices along polygon borders. To be topologically correct, a vertex at the junction of two polygons must be present on both polygons. Missing vertices are errors.

../../../../_images/check_geometry_missing_vertex.png — Fig. 24.5 Reporting errors for missing vertices on polygon features.

Vedi anche

Add missing vertices along borders

Parametri

Parametri di base

Etichetta	Nome	Tipo	Descrizione
Layer in ingresso	`INPUT`	[vector: polygon]	Layer with the geometries to check.
Unique feature identifier	`UNIQUE_ID`	[tablefield: any]	Field storing unique values for feature identification.
Missing vertices errors	`ERRORS`	[vector: point] Predefinito: `[Create temporary layer]`	Specification of the output layer containing the errors location. One of: Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.
Missing vertices features Opzionale	`OUTPUT`	[vector: polygon] Predefinito: `[Skip output]`	Polygon layer with the features whose vertices are missing. One of: Tralascia risultato Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.

Parametri avanzati

Etichetta

Nome

Tipo

Descrizione

Tolleranza

TOLERANCE

[numeric: integer]

Predefinito: 8

Numerical precision of geometric operations, given as an integer n, meaning that two vertices less than 10^-n apart (in map units) are considered to be merged.

In uscita:

Etichetta

Nome

Tipo

Descrizione

Missing vertices errors

ERRORS

[vector: point]

Output point layer representing the error locations and information. The output layer contains the following fields:

gc_layerid: the ID of the input layer.
gc_layername: the name of the input layer.
gc_partidx
gc_ringidx
gc_vertidx
gc_errorx: the x coordinate of the missing vertex.
gc_errory: the y coordinate of the missing vertex.
gc_error
UNIQUE_ID field: the unique ID of the input feature that has a missing vertex.

Missing vertices features

OUTPUT

[vector: polygon]

Output polygon layer with features whose vertices are missing. There will be as many (duplicate) features as there are missing vertices in each geometry. If no vertices are missing, the output layer will be empty. Available fields are the same as in the ERRORS output.

Codice Python

Algorithm ID: native:checkgeometrymissingvertex

import processing
processing.run("algorithm_id", {parameter_dictionary})

L” id dell’algoritmo viene visualizzato quando si passa il mouse sull’algoritmo nella finestra degli strumenti di elaborazione. Il dizionario dei parametri fornisce i Nomi e i valori dei parametri. Vedi Usare gli algoritmi di Processing dalla console dei comandi per dettagli su come eseguire algoritmi di elaborazione dalla console Python.

24.1.3.10. Overlaps 

Added in 3.42

Calculates overlapping areas in polygon geometries, and reports areas smaller than a given minimum as errors.

../../../../_images/check_geometry_overlaps.png — Fig. 24.6 Hashed polygons indicate overlapping areas smaller than the specified minimum.

Vedi anche

Delete overlaps, Convalida della copertura

Parametri

Parametri di base

Etichetta	Nome	Tipo	Descrizione
Layer in ingresso	`INPUT`	[vector: polygon]	Layer with the geometries to check.
Unique feature identifier	`UNIQUE_ID`	[tablefield: any]	Field storing unique values for feature identification.
Minimum overlap area	`MIN_OVERLAP_AREA`	[numeric: double]	Minimum area of the overlap to be reported as an error. If set to 0, all overlaps are reported.
Overlap errors	`ERRORS`	[vector: point] Predefinito: `[Create temporary layer]`	Specification of the output layer containing centroid points of the overlapping areas. One of: Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.
Overlap features Opzionale	`OUTPUT`	[vector: polygon] Predefinito: `[Skip output]`	Specification of the output layer for features containing overlaps. One of: Tralascia risultato Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.

Parametri avanzati

Etichetta

Nome

Tipo

Descrizione

Tolleranza

TOLERANCE

[numeric: integer]

Predefinito: 8

Numerical precision of geometric operations, given as an integer n, meaning that two vertices less than 10^-n apart (in map units) are considered to be merged.

In uscita:

Etichetta

Nome

Tipo

Descrizione

Overlap errors

ERRORS

[vector: point]

Output point layer representing the error locations and information. The output layer contains the following fields:

gc_layerid: the ID of the input layer.
gc_layername: the name of the input layer.
gc_errorx: the x coordinate of the centroid of the overlapping area.
gc_errory: the y coordinate of the centroid of the overlapping area.
gc_error: the area of the overlapping geometry.
UNIQUE_ID field: the unique ID of an overlapped input feature.
gc_overlap_feature_{unique_id}: the UNIQUE_ID field value for the other overlapping feature.

Overlap features

OUTPUT

[vector: polygon]

Output layer containing the overlapping areas. Available fields are the same as in the ERRORS output.

Codice Python

Algorithm ID: native:checkgeometryoverlap

import processing
processing.run("algorithm_id", {parameter_dictionary})

L” id dell’algoritmo viene visualizzato quando si passa il mouse sull’algoritmo nella finestra degli strumenti di elaborazione. Il dizionario dei parametri fornisce i Nomi e i valori dei parametri. Vedi Usare gli algoritmi di Processing dalla console dei comandi per dettagli su come eseguire algoritmi di elaborazione dalla console Python.

24.1.3.11. Points outside lines 

Added in 3.42

Checks if the points in the input layer are covered by a line in the selected line layers. A point not covered by a line is an error.

../../../../_images/check_geometry_pointcoveredbyline.png — Fig. 24.7 Reporting errors on points not covered by a line.

Parametri

Parametri di base

Etichetta	Nome	Tipo	Descrizione
Layer in ingresso	`INPUT`	[vector: point]	Layer with the geometries to check.
Unique feature identifier	`UNIQUE_ID`	[tablefield: any]	Field storing unique values for feature identification.
Line layers	`LINES`	[vector: line][list]	Layer(s) with the lines to check against.
Points not covered by a line	`ERRORS`	[vector: point] Predefinito: `[Create temporary layer]`	Specification of the output layer containing points not covered by a line. One of: Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.

Parametri avanzati

Etichetta

Nome

Tipo

Descrizione

Tolleranza

TOLERANCE

[numeric: integer]

Predefinito: 8

Numerical precision of geometric operations, given as an integer n, meaning that two vertices less than 10^-n apart (in map units) are considered to be merged.

In uscita:

Etichetta

Nome

Tipo

Descrizione

Points not covered by a line

ERRORS

[vector: point]

Output point layer representing the error locations and information. The output layer contains the following fields:

gc_layerid: the ID of the input layer.
gc_layername: the name of the input layer.
gc_partidx
gc_ringidx
gc_vertidx
gc_errorx: the x coordinate of point outside the lines.
gc_errory: the y coordinate of point outside the lines.
gc_error
UNIQUE_ID field: the unique ID of the input feature that is outside the lines.

Codice Python

Algorithm ID: native:checkgeometrypointcoveredbyline

import processing
processing.run("algorithm_id", {parameter_dictionary})

L” id dell’algoritmo viene visualizzato quando si passa il mouse sull’algoritmo nella finestra degli strumenti di elaborazione. Il dizionario dei parametri fornisce i Nomi e i valori dei parametri. Vedi Usare gli algoritmi di Processing dalla console dei comandi per dettagli su come eseguire algoritmi di elaborazione dalla console Python.

24.1.3.12. Points outside polygons 

Added in 3.42

Checks if points from the input layer are in polygons from the selected polygon layers. Points that are not fully inside polygons are errors.

../../../../_images/check_geometry_point_in_polygon.png — Fig. 24.8 Reporting errors on points outside polygons.

Parametri

Parametri di base

Etichetta	Nome	Tipo	Descrizione
Layer in ingresso	`INPUT`	[vector: point]	Layer with the geometries to check.
Unique feature identifier	`UNIQUE_ID`	[tablefield: any]	Field storing unique values for feature identification.
Polygon layers	`POLYGONS`	[vector: polygon][list]	Layer(s) with the polygons to check against.
Points outside polygons errors	`ERRORS`	[vector: point] Predefinito: `[Create temporary layer]`	Specification of the output layer containing points outside the polygons. One of: Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.

Parametri avanzati

Etichetta

Nome

Tipo

Descrizione

Tolleranza

TOLERANCE

[numeric: integer]

Predefinito: 8

Numerical precision of geometric operations, given as an integer n, meaning that two vertices less than 10^-n apart (in map units) are considered to be merged.

In uscita:

Etichetta

Nome

Tipo

Descrizione

Points outside polygons errors

ERRORS

[vector: point]

Output point layer representing the error locations and information. The output layer contains the following fields:

gc_layerid: the ID of the input layer.
gc_layername: the name of the input layer.
gc_partidx
gc_ringidx
gc_vertidx
gc_errorx: the x coordinate of point outside the polygons.
gc_errory: the y coordinate of point outside the polygons.
gc_error
UNIQUE_ID field: the unique ID of the input feature that is outside the polygons.

Codice Python

Algorithm ID: native:checkgeometrypointinpolygon

import processing
processing.run("algorithm_id", {parameter_dictionary})

L” id dell’algoritmo viene visualizzato quando si passa il mouse sull’algoritmo nella finestra degli strumenti di elaborazione. Il dizionario dei parametri fornisce i Nomi e i valori dei parametri. Vedi Usare gli algoritmi di Processing dalla console dei comandi per dettagli su come eseguire algoritmi di elaborazione dalla console Python.

24.1.3.13. Self-contacts 

Added in 3.42

Checks if the geometry has self contact points (in line or polygon), i.e., a vertex that touches more than two segments of the same ring. Self contacts are errors.

Nota

This algorithm detects invalid polygon geometries (self-contacts). To ensure these invalid features are not filtered out before processing, open ^{Advanced options} next to the Input layer and set Invalid feature filtering to Do not Filter (Better Performance).

../../../../_images/check_geometry_selfcontact.png — Fig. 24.9 Self-intersection vs self-contact.

Vedi anche

Self-intersections

Parametri

Parametri di base

Etichetta	Nome	Tipo	Descrizione
Layer in ingresso	`INPUT`	[vector: line, polygon]	Layer with the geometries to check.
Unique feature identifier	`UNIQUE_ID`	[tablefield: any]	Field storing unique values for feature identification.
Self contact error points	`ERRORS`	[vector: point] Predefinito: `[Create temporary layer]`	Specification of the output layer containing the errors location. One of: Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.
Self contact features Opzionale	`OUTPUT`	[same as input] Predefinito: `[Skip output]`	Line or polygon layer containing self-contact features. One of: Tralascia risultato Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.

Parametri avanzati

Etichetta

Nome

Tipo

Descrizione

Tolleranza

TOLERANCE

[numeric: integer]

Predefinito: 8

Numerical precision of geometric operations, given as an integer n, meaning that two vertices less than 10^-n apart (in map units) are considered to be merged.

In uscita:

Etichetta

Nome

Tipo

Descrizione

Self contact error points

ERRORS

[vector: point]

Output point layer representing the error locations and information. The output layer contains the following fields:

gc_layerid: the ID of the input layer.
gc_layername: the name of the input layer.
gc_partidx: the index of the feature’s geometry part where the self-contact occurs.
gc_ringidx: the index of the ring where the self-contact occurs.
gc_vertidx: the index of the vertex where the self-contact occurs.
gc_errorx: the x coordinate of the self-contact.
gc_errory: the y coordinate of the self-contact.
gc_error
UNIQUE_ID field: the unique ID of the self-contacting input feature.

Self contact features

OUTPUT

[vector: same as input]

Output polygon or line layer with features containing the self-contact features. If no self-contact features are found, the output layer will be empty. Available fields are the same as in the ERRORS output.

Codice Python

Algorithm ID: native:checkgeometryselfcontact

import processing
processing.run("algorithm_id", {parameter_dictionary})

L” id dell’algoritmo viene visualizzato quando si passa il mouse sull’algoritmo nella finestra degli strumenti di elaborazione. Il dizionario dei parametri fornisce i Nomi e i valori dei parametri. Vedi Usare gli algoritmi di Processing dalla console dei comandi per dettagli su come eseguire algoritmi di elaborazione dalla console Python.

24.1.3.14. Self-intersections 

Added in 3.42

Detects self-intersections in line or polygon geometries, and reports them as errors. Self-intersections occur when the segments of a geometry cross over each other without having a common vertex.

Nota

This algorithm detects invalid polygon geometries (self-intersections). To ensure these invalid features are not filtered out before processing, open ^{Advanced options} next to the Input layer and set Invalid feature filtering to Do not Filter (Better Performance).

../../../../_images/check_geometry_selfintersections.png — Fig. 24.10 Self-intersection vs self-contact.

Vedi anche

Split self-intersecting geometries, Self-contacts

Parametri

Parametri di base

Etichetta	Nome	Tipo	Descrizione
Layer in ingresso	`INPUT`	[vector: line, polygon]	Layer with the geometries to check
Unique feature identifier	`UNIQUE_ID`	[tablefield: any]	Field storing unique values for feature identification
Self-intersecting errors	`ERRORS`	[vector: point] Predefinito: `[Create temporary layer]`	Specification of the output layer containing the errors location. One of: Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.
Self-intersecting features Opzionale	`OUTPUT`	[same as input] Predefinito: `[Skip output]`	Line or polygon layer containing self-intersected features. One of: Tralascia risultato Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.

Parametri avanzati

Etichetta

Nome

Tipo

Descrizione

Tolleranza

TOLERANCE

[numeric: integer]

Predefinito: 8

Numerical precision of geometric operations, given as an integer n, meaning that two vertices less than 10^-n apart (in map units) are considered to be merged.

In uscita:

Etichetta

Nome

Tipo

Descrizione

Self-intersecting errors

ERRORS

[vector: point]

Output point layer representing the error locations and information. The output layer contains the following fields:

gc_layerid: the ID of the input layer.
gc_layername: the name of the input layer.
gc_partidx: the index of the feature’s geometry part where the self-intersection occurs.
gc_ringidx: the index of the feature’s geometry ring where the self-intersection occurs.
gc_vertidx
gc_errorx: the x coordinate of the self-intersection.
gc_errory: the y coordinate of the self-intersection.
gc_error
gc_segment_1: the index of the first segment involved in the intersection.
gc_segment_2: the index of the second segment involved in the intersection.
UNIQUE_ID field: the unique ID of the self-intersecting input feature.

Self-intersecting features

OUTPUT

[vector: line, polygon]

Output polygon or line layer with features containing the self-intersecting features. If no self-intersecting features are found, the output layer will be empty. Available fields are the same as in the ERRORS output.

Codice Python

Algorithm ID: native:checkgeometryselfintersection

import processing
processing.run("algorithm_id", {parameter_dictionary})

L” id dell’algoritmo viene visualizzato quando si passa il mouse sull’algoritmo nella finestra degli strumenti di elaborazione. Il dizionario dei parametri fornisce i Nomi e i valori dei parametri. Vedi Usare gli algoritmi di Processing dalla console dei comandi per dettagli su come eseguire algoritmi di elaborazione dalla console Python.

24.1.3.15. Sliver polygons 

Added in 3.42

Detects sliver polygons in a polygon layer, i.e., polygons with a thinness greater than a specified value.

The thinness is the ratio between the area of the minimum square containing the polygon and the area of the polygon itself (a square has a thinness value of 1). The thinness value is between 1 and +infinity. A maximum area can be set for limiting the checks to polygons of a lower area. Polygons having a thinness higher than the maximum thinness are errors. To fix sliver polygons, use the Fix small polygons algorithm.

Nota

This algorithm detects invalid polygon geometries (sliver polygons). To ensure these invalid features are not filtered out before processing, open ^{Advanced options} next to the Input layer and set Invalid feature filtering to Do not Filter (Better Performance).

../../../../_images/check_geometry_sliver_polygon.png — Fig. 24.11 Reporting errors on features with sliver polygons.

Vedi anche

Fix small polygons

Parametri

Parametri di base

Etichetta	Nome	Tipo	Descrizione
Layer in ingresso	`INPUT`	[vector: polygon]	Layer with the geometries to check.
Unique feature identifier	`UNIQUE_ID`	[tablefield: any]	Field storing unique values for feature identification.
Maximum thinness	`MAX_THINNESS`	[numeric: double] Default: 20.0	Maximum thinness value of a polygon to be considered valid. Any polygon with a thinness value above this threshold is reported as error.
Maximum area (map units squared)	`MAX_AREA`	[numeric: double] Predefinito: 0.0	Maximum area of a polygon to be checked (in map units). Any polygon with an area above this threshold is skipped. A value of 0 means all polygons are checked.
Sliver polygon errors	`ERRORS`	[vector: point] Predefinito: `[Create temporary layer]`	Specification of the output layer containing the centroid points of sliver polygon features. One of: Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.
Sliver polygon features Opzionale	`OUTPUT`	[vector: polygon] Predefinito: `[Skip output]`	Polygon layer containing sliver polygon features. One of: Tralascia risultato Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.

Parametri avanzati

Etichetta

Nome

Tipo

Descrizione

Tolleranza

TOLERANCE

[numeric: integer]

Predefinito: 8

Numerical precision of geometric operations, given as an integer n, meaning that two vertices less than 10^-n apart (in map units) are considered to be merged.

In uscita:

Etichetta

Nome

Tipo

Descrizione

Sliver polygon errors

ERRORS

[vector: point]

Output point layer representing the error locations and information. The output layer contains the following fields:

gc_layerid: the ID of the input layer.
gc_layername: the name of the input layer.
gc_partidx
gc_ringidx
gc_vertidx
gc_errorx: the x coordinate of the centroid of the sliver polygon feature.
gc_errory: the y coordinate of the centroid of the sliver polygon feature.
gc_error: the thinness value of the sliver polygon feature.
UNIQUE_ID field: the unique ID of the input feature that is a sliver polygon.

Sliver polygon features

OUTPUT

[vector: polygon]

Output layer with features containing the sliver polygons. If no sliver polygon features are found, the output layer will be empty. Available fields are the same as in the ERRORS output.

Codice Python

Algorithm ID: native:checkgeometrysliverpolygon

import processing
processing.run("algorithm_id", {parameter_dictionary})

L” id dell’algoritmo viene visualizzato quando si passa il mouse sull’algoritmo nella finestra degli strumenti di elaborazione. Il dizionario dei parametri fornisce i Nomi e i valori dei parametri. Vedi Usare gli algoritmi di Processing dalla console dei comandi per dettagli su come eseguire algoritmi di elaborazione dalla console Python.

24.1.3.16. Small angles 

Added in 3.42

Compares the angles within line or polygon geometries to a specified threshold, and reports as error any angle below that value.

../../../../_images/check_geometry_angle.png — Fig. 24.12 Reporting errors on a line feature for angles lower than 15°.

Vedi anche

Delete small angles

Parametri

Parametri di base

Etichetta	Nome	Tipo	Descrizione
Layer in ingresso	`INPUT`	[vector: line, polygon]	Layer with the geometries to check.
Unique feature identifier	`UNIQUE_ID`	[tablefield: any]	Field storing unique values for feature identification.
Minimum angle	`MIN_ANGLE`	[numeric: double]	Allowed minimum angle between adjacent segments in a feature’s geometry. Any angle below this threshold is reported as error.
Small angle errors	`ERRORS`	[vector: point] Predefinito: `[Create temporary layer]`	Specification of the output layer containing the errors location. One of: Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.

Parametri avanzati

Etichetta

Nome

Tipo

Descrizione

Tolleranza

TOLERANCE

[numeric: integer]

Predefinito: 8

Numerical precision of geometric operations, given as an integer n, meaning that two vertices less than 10^-n apart (in map units) are considered to be merged.

In uscita:

Etichetta

Nome

Tipo

Descrizione

Small angle errors

ERRORS

[vector: point]

Output point layer representing the error locations and information. The output layer contains the following fields:

gc_layerid: the ID of the input layer.
gc_layername: the name of the input layer.
gc_partidx: the index of the feature’s geometry part containing the small angle.
gc_ringidx: the index of the feature’s geometry ring containing the small angle.
gc_vertidx: the index of the vertex with the small angle in the feature’s geometry ring.
gc_errorx: the x coordinate of the vertex with the small angle.
gc_errory: the y coordinate of the vertex with the small angle.
gc_error: the error angle value.
UNIQUE_ID field: the unique ID of the input feature with the small angle.

Codice Python

Algorithm ID: native:checkgeometryangle

import processing
processing.run("algorithm_id", {parameter_dictionary})

L” id dell’algoritmo viene visualizzato quando si passa il mouse sull’algoritmo nella finestra degli strumenti di elaborazione. Il dizionario dei parametri fornisce i Nomi e i valori dei parametri. Vedi Usare gli algoritmi di Processing dalla console dei comandi per dettagli su come eseguire algoritmi di elaborazione dalla console Python.

24.1.3.17. Small polygons 

Added in 3.42

Detects polygon features whose area is below a specified value as errors.

Nota

This algorithm detects invalid polygon geometries (small polygons). To ensure these invalid features are not filtered out before processing, open ^{Advanced options} next to the Input layer and set Invalid feature filtering to Do not Filter (Better Performance).

../../../../_images/check_geometry_area.png — Fig. 24.13 Reporting errors on features with small polygons (below given area threshold).

Vedi anche

Fix small polygons

Parametri

Parametri di base

Etichetta	Nome	Tipo	Descrizione
Layer in ingresso	`INPUT`	[vector: polygon]	Layer with the geometries to check.
Unique feature identifier	`UNIQUE_ID`	[tablefield: any]	Field storing unique values for feature identification.
Area threshold	`AREATHRESHOLD`	[numeric: double] Valore predefinito: 0	Minimum area of a polygon to be considered valid, in selected units. Any polygon with an area below this threshold is reported as error.
Small polygons errors	`ERRORS`	[vector: point] Predefinito: `[Create temporary layer]`	Specification of the output layer containing centroid points of small polygons. One of: Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.
Small polygons features Opzionale	`OUTPUT`	[vector: polygon] Predefinito: `[Skip output]`	Specification of the output layer for features containing small polygon features. One of: Tralascia risultato Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.

Parametri avanzati

Etichetta

Nome

Tipo

Descrizione

Tolleranza

TOLERANCE

[numeric: integer]

Predefinito: 8

Numerical precision of geometric operations, given as an integer n, meaning that two vertices less than 10^-n apart (in map units) are considered to be merged.

In uscita:

Etichetta

Nome

Tipo

Descrizione

Small polygons errors

ERRORS

[vector: point]

Output point layer representing the error locations and information. The output layer contains the following fields:

gc_layerid: the ID of the input layer.
gc_layername: the name of the input layer.
gc_partidx
gc_ringidx
gc_vertidx
gc_errorx: the x coordinate of the centroid of the small polygon.
gc_errory: the y coordinate of the centroid of the small polygon.
gc_error: the area of the small polygon.
UNIQUE_ID field: the unique ID of the input feature that is a small polygon.

Small polygons features

OUTPUT

[vector: polygon]

Output polygon layer with features containing the small polygon features. If no small polygon features are found, the output layer will be empty. Available fields are the same as in the ERRORS output.

Codice Python

Algorithm ID: native:checkgeometryarea

import processing
processing.run("algorithm_id", {parameter_dictionary})

L” id dell’algoritmo viene visualizzato quando si passa il mouse sull’algoritmo nella finestra degli strumenti di elaborazione. Il dizionario dei parametri fornisce i Nomi e i valori dei parametri. Vedi Usare gli algoritmi di Processing dalla console dei comandi per dettagli su come eseguire algoritmi di elaborazione dalla console Python.

24.1.3.18. Small gaps 

Added in 3.42

Checks for gaps between polygons in the input layer. Gaps with an area smaller than the gap threshold are reported as errors. If an allowed gaps layer is provided, the algorithm ignores gaps that fall entirely within polygons from this layer. An optional buffer can be applied to the allowed gaps.

../../../../_images/check_geometry_gap.png — Fig. 24.14 Reporting errors on polygon features for gaps smaller than the specified threshold.

Vedi anche

Fill gaps, Convalida della copertura

Parametri

Parametri di base

Etichetta	Nome	Tipo	Descrizione
Layer in ingresso	`INPUT`	[vector: polygon]	Layer with the geometries to check.
Unique feature identifier	`UNIQUE_ID`	[tablefield: any]	Field storing unique values for feature identification.
Gap threshold	`GAP_THRESHOLD`	[numeric: double] Predefinito: 0.0	Maximum area of gaps to be reported as errors, in map units. If set to 0, all the gaps are reported.
Allowed gaps layer Opzionale	`ALLOWED_GAPS_LAYER`	[vector: polygon]	Optional layer specifying polygons whose areas should be ignored during the gap check. Gaps that fall entirely within these polygons will not be reported as errors.
Allowed gaps buffer Opzionale	`ALLOWED_GAPS_BUFFER`	[numeric: double] Predefinito: 0.0	Buffer distance to apply to the allowed gaps layer, in selected units. Gaps located within this buffered area are ignored. Allows adding a spatial tolerance around allowed gaps to avoid reporting near-boundary gaps as errors.
Neighbors layer	`NEIGHBORS`	[vector: table] Predefinito: `[Create temporary layer]`	Specification of the output table representing the gap ID and the unique ID of its neighbor features. One of: Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.
Gap errors Opzionale	`ERRORS`	[vector: point] Predefinito: `[Skip output]`	Specification of the output layer containing the centroid points of the gaps. One of: Tralascia risultato Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.
Gap features	`OUTPUT`	[vector: polygon] Predefinito: `[Create temporary layer]`	Specification of the output layer containing the gap geometries. One of: Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.

Parametri avanzati

Etichetta

Nome

Tipo

Descrizione

Tolleranza

TOLERANCE

[numeric: integer]

Predefinito: 8

Numerical precision of geometric operations, given as an integer n, meaning that two vertices less than 10^-n apart (in map units) are considered to be merged.

In uscita:

Etichetta

Nome

Tipo

Descrizione

Neighbors layer

NEIGHBORS

[vector: table]

A 1–N relational table, meaning that one gap can be associated with multiple neighboring polygons. The output table contains the following fields:

gc_errorid: the ID of the gap.
UNIQUE_ID field: the unique ID of an input feature that is a neighbor of the gap.

Gap errors

ERRORS

[vector: point]

Output point layer representing the error locations and information. The output layer contains the following fields:

gc_layerid: the ID of the input layer.
gc_layername: the name of the input layer.
gc_partidx
gc_ringidx
gc_vertidx
gc_errorx: the x coordinate of the centroid of the gap.
gc_errory: the y coordinate of the centroid of the gap.
gc_error: the area of the gap.
gc_errorid: the ID of the gap.

Gap features

OUTPUT

[vector: polygon]

Output layer containing the gap geometries. Available fields are the same as in the ERRORS output.

Codice Python

Algorithm ID: native:checkgeometrygap

import processing
processing.run("algorithm_id", {parameter_dictionary})

L” id dell’algoritmo viene visualizzato quando si passa il mouse sull’algoritmo nella finestra degli strumenti di elaborazione. Il dizionario dei parametri fornisce i Nomi e i valori dei parametri. Vedi Usare gli algoritmi di Processing dalla console dei comandi per dettagli su come eseguire algoritmi di elaborazione dalla console Python.

24.1.3.19. Small segments 

Added in 3.42

Calculates length of individual segments in line or polygon geometries, and reports segments shorter than a minimum length as errors.

../../../../_images/check_geometry_smallsegments.png — Fig. 24.15 Reporting errors (in red) on single line segments shorter than the given threshold.

Vedi anche

Eliminare elementi

Parametri

Parametri di base

Etichetta	Nome	Tipo	Descrizione
Layer in ingresso	`INPUT`	[vector: line, polygon]	Layer with the geometries to check.
Unique feature identifier	`UNIQUE_ID`	[tablefield: any]	Field storing unique values for feature identification.
Minimum segment length	`MIN_SEGMENT_LENGTH`	[numeric: double] Predefinito: 0.0	Minimum length of segments to be considered valid, in map units.
Short segments errors	`ERRORS`	[vector: point] Predefinito: `[Create temporary layer]`	Specification of the output layer containing centroid of short segments. One of: Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.
Short segments features Opzionale	`OUTPUT`	[vector: same as input] Predefinito: `[Skip output]`	Specification of the output layer for features containing short segments. One of: Tralascia risultato Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.

Parametri avanzati

Etichetta

Nome

Tipo

Descrizione

Tolleranza

TOLERANCE

[numeric: integer]

Predefinito: 8

Numerical precision of geometric operations, given as an integer n, meaning that two vertices less than 10^-n apart (in map units) are considered to be merged.

In uscita:

Etichetta

Nome

Tipo

Descrizione

Short segments errors

ERRORS

[vector: point]

Output point layer representing the error locations and information. The output layer contains the following fields:

gc_layerid: the ID of the input layer.
gc_layername: the name of the input layer.
gc_partidx: the index of the feature’s geometry part containing the small segment.
gc_ringidx: the index of the feature’s geometry ring containing the small segment.
gc_vertidx: the index of the end vertex of the small segment in the feature’s geometry ring.
gc_errorx: the x coordinate of the centroid of the small segment.
gc_errory: the y coordinate of the centroid of the small segment.
gc_error: the error segment length.
UNIQUE_ID field: the unique ID of the input feature with the small segment.

Short segments features

OUTPUT

[vector: same as input]

Output layer containing, for each identified short segment, the feature it belongs to. Available fields are the same as in the ERRORS output.

Codice Python

Algorithm ID: native:checkgeometrysegmentlength

import processing
processing.run("algorithm_id", {parameter_dictionary})

L” id dell’algoritmo viene visualizzato quando si passa il mouse sull’algoritmo nella finestra degli strumenti di elaborazione. Il dizionario dei parametri fornisce i Nomi e i valori dei parametri. Vedi Usare gli algoritmi di Processing dalla console dei comandi per dettagli su come eseguire algoritmi di elaborazione dalla console Python.

24.1.3.20. Strictly multipart 

Added in 3.42

Checks if multipart geometries have more than one part. Multipart geometries with only one part are errors.

Vedi anche

Convert to strictly multipart

Parametri

Parametri di base

Etichetta	Nome	Tipo	Descrizione
Layer in ingresso	`INPUT`	[vector: geometry]	Layer with the geometries to check.
Unique feature identifier	`UNIQUE_ID`	[tablefield: any]	Field storing unique values for feature identification.
One-part geometry errors	`ERRORS`	[vector: point] Predefinito: `[Create temporary layer]`	Specification of the output layer containing centroid of the multipart geometries that have only one part. One of: Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.
One-part geometry features Opzionale	`OUTPUT`	[vector: same as input] Predefinito: `[Skip output]`	Specification of the output layer for features containing multipart geometries that have only one part. One of: Tralascia risultato Crea Layer Temporaneo (`TEMPORARY_OUTPUT`) Salva su File… Salva su Geopackage… Salva su Tabella di Database… La codifica del file può anche essere cambiata qui.

Parametri avanzati

Etichetta

Nome

Tipo

Descrizione

Tolleranza

TOLERANCE

[numeric: integer]

Predefinito: 8

Numerical precision of geometric operations, given as an integer n, meaning that two vertices less than 10^-n apart (in map units) are considered to be merged.

In uscita:

Etichetta

Nome

Tipo

Descrizione

One-part geometry errors

ERRORS

[vector: point]

Output point layer representing the error locations and information. The output layer contains the following fields:

gc_layerid: the ID of the input layer.
gc_layername: the name of the input layer.
gc_partidx
gc_ringidx
gc_vertidx
gc_errorx: the x coordinate of the centroid of the multipart geometry that has only one part.
gc_errory: the y coordinate of the centroid of the multipart geometry that has only one part.
gc_error
UNIQUE_ID field: the unique ID of the input feature that is multipart but has only one part.

One-part geometry features

OUTPUT

[vector: same as input]

Output layer containing features that are multipart but have only one part. Available fields are the same as in the ERRORS output.

Codice Python

Algorithm ID: native:checkgeometrymultipart

import processing
processing.run("algorithm_id", {parameter_dictionary})

L” id dell’algoritmo viene visualizzato quando si passa il mouse sull’algoritmo nella finestra degli strumenti di elaborazione. Il dizionario dei parametri fornisce i Nomi e i valori dei parametri. Vedi Usare gli algoritmi di Processing dalla console dei comandi per dettagli su come eseguire algoritmi di elaborazione dalla console Python.