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24.2.7. Vector geoprocessing

24.2.7.1. Buffer vectors

Create buffers around the features of a vector layer.

Parametry

Parametry podstawowe

Etykieta	Nazwa	Typ	Opis
Warstwa wejściowa	INPUT	[vector: geometry]	The input vector layer
Geometry column name	GEOMETRY	[ciąg tekstowy] Default: «geometry»	The name of the input layer geometry column to use
Buffer distance	DISTANCE	[numeric: double] Domyślnie: 10.0	Minimum: 0.0
Dissolve by attribute Opcjonalne	FIELD	[tablefield: any] Default: Not set	Field to use for dissolving
Dissolve results	DISSOLVE	[wartość logiczna] Domyślnie: False	If set, the result is dissolved. If no field is set for dissolving, all the buffers are dissolved into one feature.
Produce one feature for each geometry in any kind of geometry collection in the source file	EXPLODE_COLLECTIONS	[wartość logiczna] Domyślnie: False
Bufor	OUTPUT	[vector: polygon] Domyślnie: [Zapisz do pliku tymczasowego]	Specify the output buffer layer. One of: Zapisz do pliku tymczasowego Zapisz do pliku…

Parametry zaawansowane

Etykieta	Nazwa	Typ	Opis
Additional creation options Opcjonalne	OPTIONS	[ciąg tekstowy] Default: «» (no additional options)	Additional GDAL creation options.

Wyniki

Etykieta	Nazwa	Typ	Opis
Bufor	OUTPUT	[vector: polygon]	The output buffer layer

Kod pythona

ID algorytmu: gdal:buffervectors

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

The algorithm id is displayed when you hover over the algorithm in the Processing Toolbox. The parameter dictionary provides the parameter NAMEs and values. See Using processing algorithms from the console for details on how to run processing algorithms from the Python console.

24.2.7.2. Clip vector by extent

Clips any OGR-supported vector file to a given extent.

This algorithm is derived from the GDAL ogr2ogr utility.

Parametry

Parametry podstawowe

Etykieta	Nazwa	Typ	Opis
Warstwa wejściowa	INPUT	[vector: geometry]	The input vector layer
Clip extent	EXTENT	[zasięg]	Defines the bounding box that should be used for the output vector file. It has to be defined in target CRS coordinates. Available methods are: Calculate from layer…: uses extent of a layer loaded in the current project Calculate from layout map…: uses extent of a layout map item in the active project Calculate from bookmark…: uses extent of a saved bookmark Use map canvas extent Draw on canvas: click and drag a rectangle delimiting the area to take into account Enter the coordinates as xmin, xmax, ymin, ymax
Clipped (extent)	OUTPUT	[same as input] Domyślnie: [Zapisz do pliku tymczasowego]	Specify the output (clipped) layer. One of: Zapisz do pliku tymczasowego Zapisz do pliku…

Parametry zaawansowane

Etykieta	Nazwa	Typ	Opis
Additional creation options Opcjonalne	OPTIONS	[ciąg tekstowy] Default: «» (no additional options)	Additional GDAL creation options.

Wyniki

Etykieta	Nazwa	Typ	Opis
Clipped (extent)	OUTPUT	[same as input]	The output (clipped) layer. The default format is „ESRI Shapefile”.

Kod pythona

ID algorytmu: gdal:clipvectorbyextent

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

The algorithm id is displayed when you hover over the algorithm in the Processing Toolbox. The parameter dictionary provides the parameter NAMEs and values. See Using processing algorithms from the console for details on how to run processing algorithms from the Python console.

24.2.7.3. Clip vector by mask layer

Clips any OGR-supported vector layer by a mask polygon layer.

This algorithm is derived from the GDAL ogr2ogr utility.

Parametry

Parametry podstawowe

Etykieta	Nazwa	Typ	Opis
Warstwa wejściowa	INPUT	[vector: geometry]	The input vector layer
Mask layer	MASK	[vector: polygon]	Layer to be used as clipping extent for the input vector layer.
Clipped (mask)	OUTPUT	[same as input] Domyślnie: [Zapisz do pliku tymczasowego]	The output (masked) layer. One of: Zapisz do pliku tymczasowego Zapisz do pliku…

Parametry zaawansowane

Etykieta	Nazwa	Typ	Opis
Additional creation options Opcjonalne	OPTIONS	[ciąg tekstowy] Default: «» (no additional options)	Additional GDAL creation options.

Wyniki

Etykieta	Nazwa	Typ	Opis
Clipped (mask)	OUTPUT	[same as input]	The output (masked) layer. The default format is „ESRI Shapefile”.

Kod pythona

ID algorytmu: gdal:clipvectorbypolygon

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

The algorithm id is displayed when you hover over the algorithm in the Processing Toolbox. The parameter dictionary provides the parameter NAMEs and values. See Using processing algorithms from the console for details on how to run processing algorithms from the Python console.

24.2.7.4. Agreguj

Dissolve (combine) geometries that have the same value for a given attribute / field. The output geometries are multipart.

Parametry

Parametry podstawowe

Etykieta	Nazwa	Typ	Opis
Warstwa wejściowa	INPUT	[vector: geometry]	The input layer to dissolve
Dissolve field Opcjonalne	FIELD	[tablefield: any]	The field of the input layer to use for dissolving
Geometry column name	GEOMETRY	[ciąg tekstowy] Default: «geometry»	The name of the input layer geometry column to use for dissolving.
Agreguj	OUTPUT	[same as input] Domyślnie: [Zapisz do pliku tymczasowego]	Specify the output layer. One of: Zapisz do pliku tymczasowego Zapisz do pliku…

Parametry zaawansowane

Etykieta	Nazwa	Typ	Opis
Produce one feature for each geometry in any kind of geometry collection in the source file	EXPLODE_COLLECTIONS	[wartość logiczna] Domyślnie: False	Produce one feature for each geometry in any kind of geometry collection in the source file
Keep input attributes	KEEP_ATTRIBUTES	[wartość logiczna] Domyślnie: False	Keep all attributes from the input layer
Count dissolved features	COUNT_FEATURES	[wartość logiczna] Domyślnie: False	Count the dissolved features and include it in the output layer.
Compute area and perimeter of dissolved features	COMPUTE_AREA	[wartość logiczna] Domyślnie: False	Compute the area and perimeter of dissolved features and include them in the output layer
Compute min/max/sum/mean for attribute	COMPUTE_STATISTICS	[wartość logiczna] Domyślnie: False	Calculate statistics (min, max, sum and mean) for the numeric attribute specified and include them in the output layer
Numeric attribute to calculate statistics on Opcjonalne	STATISTICS_ATTRIBUTE	[tablefield: numeric]	The numeric attribute to calculate statistics on
Additional creation options Opcjonalne	OPTIONS	[ciąg tekstowy] Default: «» (no additional options)	Additional GDAL creation options.

Wyniki

Etykieta	Nazwa	Typ	Opis
Agreguj	OUTPUT	[same as input]	The output multipart geometry layer (with dissolved geometries)

Kod pythona

ID algorytmu: gdal:dissolve

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

The algorithm id is displayed when you hover over the algorithm in the Processing Toolbox. The parameter dictionary provides the parameter NAMEs and values. See Using processing algorithms from the console for details on how to run processing algorithms from the Python console.

24.2.7.5. Offset curve

Offsets lines by a specified distance. Positive distances will offset lines to the left, and negative distances will offset them to the right.

Parametry

Parametry podstawowe

Etykieta	Nazwa	Typ	Opis
Warstwa wejściowa	INPUT	[vector: line]	The input line layer
Geometry column name	GEOMETRY	[ciąg tekstowy] Default: «geometry»	The name of the input layer geometry column to use
Offset distance (left-sided: positive, right-sided: negative)	DISTANCE	[numeric: double] Domyślnie: 10.0
Offset curve	OUTPUT	[vector: line] Domyślnie: [Zapisz do pliku tymczasowego]	Specify the output line layer. One of: Zapisz do pliku tymczasowego Zapisz do pliku…

Parametry zaawansowane

Etykieta	Nazwa	Typ	Opis
Additional creation options Opcjonalne	OPTIONS	[ciąg tekstowy] Default: «» (no additional options)	Additional GDAL creation options.

Wyniki

Etykieta	Nazwa	Typ	Opis
Offset curve	OUTPUT	[vector: line]	The output offset curve layer

Kod pythona

ID algorytmu: gdal:offsetcurve

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

The algorithm id is displayed when you hover over the algorithm in the Processing Toolbox. The parameter dictionary provides the parameter NAMEs and values. See Using processing algorithms from the console for details on how to run processing algorithms from the Python console.

24.2.7.6. One side buffer

Creates a buffer on one side (right or left) of the lines in a line vector layer.

Parametry

Parametry podstawowe

Etykieta	Nazwa	Typ	Opis
Warstwa wejściowa	INPUT	[vector: line]	The input line layer
Geometry column name	GEOMETRY	[ciąg tekstowy] Default: «geometry»	The name of the input layer geometry column to use
Buffer distance	DISTANCE	[numeric: double] Domyślnie: 10.0
Buffer side	BUFFER_SIDE	[wyliczenie] Domyślnie: 0	Jeden z: 0 — Right 1 — Left
Dissolve by attribute Opcjonalne	FIELD	[tablefield: any] Default: Not set	Field to use for dissolving
Dissolve all results	DISSOLVE	[wartość logiczna] Domyślnie: False	If set, the result is dissolved. If no field is set for dissolving, all the buffers are dissolved into one feature.
Produce one feature for each geometry in any kind of geometry collection in the source file	EXPLODE_COLLECTIONS	[wartość logiczna] Domyślnie: False
One-sided buffer	OUTPUT	[vector: polygon] Domyślnie: [Zapisz do pliku tymczasowego]	Specify the output buffer layer. One of: Zapisz do pliku tymczasowego Zapisz do pliku…

Parametry zaawansowane

Etykieta	Nazwa	Typ	Opis
Additional creation options Opcjonalne	OPTIONS	[ciąg tekstowy] Default: «» (no additional options)	Additional GDAL creation options.

Wyniki

Etykieta	Nazwa	Typ	Opis
One-sided buffer	OUTPUT	[vector: polygon]	The output buffer layer

Kod pythona

ID algorytmu: gdal:onesidebuffer

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

The algorithm id is displayed when you hover over the algorithm in the Processing Toolbox. The parameter dictionary provides the parameter NAMEs and values. See Using processing algorithms from the console for details on how to run processing algorithms from the Python console.

24.2.7.7. Points along lines

Generates a point on each line of a line vector layer at a distance from start. The distance is provided as a fraction of the line length.

Parametry

Parametry podstawowe

Etykieta	Nazwa	Typ	Opis
Warstwa wejściowa	INPUT	[vector: line]	The input line layer
Geometry column name	GEOMETRY	[ciąg tekstowy] Default: «geometry»	The name of the input layer geometry column to use
Distance from line start represented as a fraction of line length	DISTANCE	[numeric: double] Default: 0.5
Points along lines	OUTPUT	[vector: point] Domyślnie: [Zapisz do pliku tymczasowego]	Specify the output point layer. One of: Zapisz do pliku tymczasowego Zapisz do pliku…

Parametry zaawansowane

Etykieta	Nazwa	Typ	Opis
Additional creation options Opcjonalne	OPTIONS	[ciąg tekstowy] Default: «» (no additional options)	Additional GDAL creation options.

Wyniki

Etykieta	Nazwa	Typ	Opis
Points along line	OUTPUT	[vector: point]	The output point layer

Kod pythona

ID algorytmu: gdal:pointsalonglines

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

The algorithm id is displayed when you hover over the algorithm in the Processing Toolbox. The parameter dictionary provides the parameter NAMEs and values. See Using processing algorithms from the console for details on how to run processing algorithms from the Python console.