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24.2.8. Įvairūs vektoriniai

24.2.8.1. Kurti virtualų vektorių

Creates a virtual vector layer that contains a set of vector layers.

This algorithm is especially useful in case another algorithm needs multiple layers but accept only one vrt in which the layers are specified.

Parametrai

Užrašas	Pavadinimas	Tipas	Aprašymas
Input datasources	INPUT	[vector: any] [list]	Select the vector layers you want to use to build the virtual vector
Create „unioned“ VRT	UNIONED	[boolean] Numatytas: ne	Check if you want to unite all the vectors in a single vrt file
Virtual vector	OUTPUT	[toks pat, kaip įvestis] Numatytas: [Įrašyti į laikiną failą]	Specify the output layer containing only the duplicates. One of: Įrašyti į laikiną failą Įrašyti į failą…

Išvestys

Užrašas	Pavadinimas	Tipas	Aprašymas
Virtual vector	OUTPUT	[vector: any]	The output virtual vector made from the chosen sources

Pythono kodas

Algorithm ID: gdal:buildvirtualvector

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

algoritmo id rodomas, kai užvedate pelę virš algoritmo apdorojimo įrankinėje. parametrų žodynas teikia parametrų pavadinimus ir reikšmes. Daugiau informacijos apie tai, kaip vykdyti apdorojimo algoritmus Pythono konsolėje rasite skyriuje Using processing algorithms from the console.

24.2.8.2. Execute SQL

Runs a simple or complex query with SQL syntax on the source layer. The result of the query will be added as a new layer.

This algorithm is derived from the GDAL ogr2ogr utility.

Parametrai

Baziniai parametrai

Užrašas	Pavadinimas	Tipas	Aprašymas
Įvesties sluoksnis	INPUT	[vector: any]	OGR-supported input vector layer
SQL expression	SQL	[string]	Defines the SQL query, for example SELECT * FROM my_table WHERE name is not null.
SQL dialect	DIALECT	[sąrašas] Numatytas: 0	SQL dialect to use. One of: 0 — None 1 — OGR SQL 2 — SQLite
SQL result	OUTPUT	[vector: any]	Specification of the output layer. One of: Įrašyti į laikiną failą Įrašyti į failą… For Save to File, the output format has to be specified. All GDAL vector formats are supported. For Save to a Temporary File the default output vector layer format will be used.

Advanced parameters

Užrašas	Pavadinimas	Tipas	Aprašymas
Additional creation options Pasirinktinis	OPTIONS	[string] Default: ‚‘ (no additional options)	Additional GDAL creation options.

Išvestys

Užrašas	Pavadinimas	Tipas	Aprašymas
SQL result	OUTPUT	[vector: any]	Vector layer created by the query

Pythono kodas

Algorithm ID: gdal:executesql

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

algoritmo id rodomas, kai užvedate pelę virš algoritmo apdorojimo įrankinėje. parametrų žodynas teikia parametrų pavadinimus ir reikšmes. Daugiau informacijos apie tai, kaip vykdyti apdorojimo algoritmus Pythono konsolėje rasite skyriuje Using processing algorithms from the console.

24.2.8.3. Export to PostgreSQL (available connections)

Imports vector layers inside a PostgreSQL database on the basis of an available connection. The connection has to be defined properly beforehand. Be aware that the checkboxes ‚Save Username‘ and ‚Save Password‘ are activated. Then you can use the algorithm.

This algorithm is derived from the GDAL ogr2ogr utility.

Parametrai

Užrašas	Pavadinimas	Tipas	Aprašymas
Database (connection name)	DATABASE	[string]	The PostgreSQL database to connect to
Įvesties sluoksnis	INPUT	[vector: any]	OGR-supported vector layer to export to the database
Shape encoding Pasirinktinis	SHAPE_ENCODING	[string] Default: ‚‘	Sets the encoding to apply to the data
Output geometry type	GTYPE	[sąrašas] Numatytas: 0	Defines the output geometry type. One of: 0 — 1 — NONE 2 — GEOMETRY 3 — POINT 4 — LINESTRING 5 — POLYGON 6 — GEOMETRYCOLLECTION 7 — MULTIPOINT 8 — MULTIPOLYGON 9 — MULTILINESTRING 10 — CIRCULARSTRING 11 — COUMPOUNDCURVE 12 — CURVEPOLYGON 13 — MULTICURVE 14 — MULTISURFACE 15 — CONVERT_TO_LINEAR 16 — CONVERT_TO_CURVE
Assign an output CRS Pasirinktinis	A_SRS	[crs] Default: Not set	Defines the output CRS of the database table
Reproject to this CRS on output Pasirinktinis	T_SRS	[crs] Default: Not set	Reprojects/transforms to this CRS on output
Override source CRS Pasirinktinis	S_SRS	[crs] Default: Not set	Overrides the input layer CRS
Schema (schema name) Pasirinktinis	SCHEMA	[string] Default: ‚public‘	Defines the schema for the database table
Table to export to (leave blank to use layer name) Pasirinktinis	TABLE	[string] Default: ‚‘	Defines a name for the table that will be imported into the database. By default the table name is the name of the input vector file.
Primary Key (new field) Pasirinktinis	PK	[string] Default: ‚id‘	Defines which attribute field will be the primary key of the database table
Primary Key (existing field, used if the above option is left empty) Pasirinktinis	PRIMARY_KEY	[tablefield: any] Default: Not set	Defines which attribute field in the exported layer will be the primary key of the database table
Geometrijos stulpelio pavadinimas Pasirinktinis	GEOCOLUMN	[string] Default: ‚geom‘	Defines in which attribute field of the database there will be the geometry information
Vector dimensions Pasirinktinis	DIM	[sąrašas] Default: 0 (2D)	Defines the coordinate dimensions of the imported vector data. One of: 0 — 2 (XY) 1 — 3 (XYZ) 2 — 4 (XYZM)
Distance tolerance for simplification Pasirinktinis	SIMPLIFY	[string] Default: ‚‘	Defines a distance tolerance for the simplification of the vector geometries to be imported. By default there is no simplification.
Maximum distance between 2 nodes (densification) Pasirinktinis	SEGMENTIZE	[string] Default: ‚‘	The maximum distance between two nodes. Used to create intermediate points. By default there is no densification.
Select features by extent (defined in input layer CRS) Pasirinktinis	SPAT	[extent] Default: Not set	You can select features from a given extent that will be in the output table. 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
Clip the input layer using the above (rectangle) extent	CLIP	[boolean] Numatytas: ne	The input layer will be clipped by the extent you defined before
Select features using a SQL „WHERE“ statement (Ex: column=“value“) Pasirinktinis	WHERE	[string] Default: ‚‘	Defines with a SQL „WHERE“ statement which features should be selected from the input layer
Group N features per transaction (Default: 2000) Pasirinktinis	GT	[string] Default: ‚‘	You can group the input features in transactions where N defines the size. By default N limits the transaction size to 20000 features.
Overwrite existing table	OVERWRITE	[boolean] Numatytas: Taip	If there is a table with the same name in the database, and if this option is set to True, the table will be overwritten.
Append to existing table	APPEND	[boolean] Numatytas: ne	If checked / True the vector data will be appended to an existing table. New fields found in the input layer are ignored. By default a new table will be created.
Append and add new fields to existing table	ADDFIELDS	[boolean] Numatytas: ne	If activated the vector data will be appended to an existing table, there won’t be a new table created. New fields found in input layer are added to the table. By default a new table will be created.
Do not launder columns/table names	LAUNDER	[boolean] Numatytas: ne	With this option checked you can prevent the default behaviour (converting column names to lowercase, removing spaces and other invalid characters).
Do not create Spatial Index	INDEX	[boolean] Numatytas: ne	Prevents a spatial index for the output table from being created. By default, a spatial index is added.
Continue after a failure, skipping the failed feature	SKIPFAILURES	[boolean] Numatytas: ne	Continue after a failure, skipping the failed feature.
Validate geometries based on Simple Features specification	MAKEVALID	[boolean] Numatytas: ne	Applies cleanup operations on geometries to ensure they are valid regarding the rules of the Simple Features specification.
Promote to Multipart	PROMOTETOMULTI	[boolean] Numatytas: Taip	Casts features geometry type to multipart in the output table
Keep width and precision of input attributes	PRECISION	[boolean] Numatytas: Taip	Avoids modifying column attributes to comply with input data
Additional creation options Pasirinktinis	OPTIONS	[string] Default: ‚‘ (no additional options)	Additional GDAL creation options.

Išvestys

This algorithm has no output.

Pythono kodas

Algorithm ID: gdal:importvectorintopostgisdatabaseavailableconnections

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

algoritmo id rodomas, kai užvedate pelę virš algoritmo apdorojimo įrankinėje. parametrų žodynas teikia parametrų pavadinimus ir reikšmes. Daugiau informacijos apie tai, kaip vykdyti apdorojimo algoritmus Pythono konsolėje rasite skyriuje Using processing algorithms from the console.

24.2.8.4. Export to PostgreSQL (new connection)

Imports vector layers inside a PostgreSQL database. A new connection to the PostGIS database must be created.

This algorithm is derived from the GDAL ogr2ogr utility.

Parametrai

Užrašas	Pavadinimas	Tipas	Aprašymas
Įvesties sluoksnis	INPUT	[vector: any]	OGR-supported vector layer to export to the database
Shape encoding Pasirinktinis	SHAPE_ENCODING	[string] Default: ‚‘	Sets the encoding to apply to the data
Output geometry type	GTYPE	[sąrašas] Numatytas: 0	Defines the output geometry type. One of: 0 — 1 — NONE 2 — GEOMETRY 3 — POINT 4 — LINESTRING 5 — POLYGON 6 — GEOMETRYCOLLECTION 7 — MULTIPOINT 8 — MULTIPOLYGON 9 — MULTILINESTRING 10 — CIRCULARSTRING 11 — COUMPOUNDCURVE 12 — CURVEPOLYGON 13 — MULTICURVE 14 — MULTISURFACE 15 — CONVERT_TO_LINEAR 16 — CONVERT_TO_CURVE
Assign an output CRS Pasirinktinis	A_SRS	[crs] Default: Not set	Defines the output CRS of the database table
Reproject to this CRS on output Pasirinktinis	T_SRS	[crs] Default: Not set	Reprojects/transforms to this CRS on output
Override source CRS Pasirinktinis	S_SRS	[crs] Default: Not set	Overrides the input layer CRS
Host Pasirinktinis	HOST	[string] Default: ‚localhost‘	Name of the database host
Port Pasirinktinis	PORT	[string] Default: ‚5432‘	Port number the PostgreSQL database server listens on
Username Pasirinktinis	USER	[string] Default: ‚‘	User name used to log in to the database
Database name Pasirinktinis	DBNAME	[string] Default: ‚‘	Name of the database
Password Pasirinktinis	PASSWORD	[string] Default: ‚‘	Password used with Username to connect to the database
Schema (schema name) Pasirinktinis	SCHEMA	[string] Default: ‚public‘	Defines the schema for the database table
Table name, leave blank to use input name Pasirinktinis	TABLE	[string] Default: ‚‘	Defines a name for the table that will be imported into the database. By default the table name is the name of the input vector file.
Primary Key (new field) Pasirinktinis	PK	[string] Default: ‚id‘	Defines which attribute field will be the primary key of the database table
Primary Key (existing field, used if the above option is left empty) Pasirinktinis	PRIMARY_KEY	[tablefield: any] Default: Not set	Defines which attribute field in the exported layer will be the primary key of the database table
Geometrijos stulpelio pavadinimas Pasirinktinis	GEOCOLUMN	[string] Default: ‚geom‘	Defines in which attribute field to store the geometry information
Vector dimensions Pasirinktinis	DIM	[sąrašas] Default: 0 (2D)	Defines the coordinate dimensions of the imported vector data. One of: 0 — 2 (XY) 1 — 3 (XYZ) 2 — 4 (XYZM)
Distance tolerance for simplification Pasirinktinis	SIMPLIFY	[string] Default: ‚‘	Defines a distance tolerance for the simplification of the vector geometries to be imported. By default there is no simplification.
Maximum distance between 2 nodes (densification) Pasirinktinis	SEGMENTIZE	[string] Default: ‚‘	The maximum distance between two nodes. Used to create intermediate points. By default there is no densification.
Select features by extent (defined in input layer CRS) Pasirinktinis	SPAT	[extent] Default: Not set	You can select features from a given extent that will be in the output table. 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
Clip the input layer using the above (rectangle) extent	CLIP	[boolean] Numatytas: ne	The input layer will be clipped by the extent you defined before
Fields to include (leave empty to use all fields) Pasirinktinis	FIELDS	[string] [list] Default: []	Defines fields to keep from the imported vector file. If none is selected, all the fields are imported.
Select features using a SQL „WHERE“ statement (Ex: column=“value“) Pasirinktinis	WHERE	[string] Default: ‚‘	Defines with a SQL „WHERE“ statement which features should be selected for the output table
Group N features per transaction (Default: 2000) Pasirinktinis	GT	[string] Default: ‚‘	You can group the input features in transactions where N defines the size. By default N limits the transaction size to 20000 features.
Overwrite existing table	OVERWRITE	[boolean] Numatytas: Taip	If there is a table with the same name in the database, and if this option is set to True, the table will be overwritten.
Append to existing table	APPEND	[boolean] Numatytas: ne	If checked / True the vector data will be appended to an existing table. New fields found in the input layer are ignored. By default a new table will be created.
Append and add new fields to existing table	ADDFIELDS	[boolean] Numatytas: ne	If activated the vector data will be appended to an existing table, there won’t be created a new table. New fields found in input layer are added to the table. By default a new table will be created.
Do not launder columns/table names	LAUNDER	[boolean] Numatytas: ne	With this option checked you can prevent the default behaviour (converting column names to lowercase, removing spaces and other invalid characters).
Do not create Spatial Index	INDEX	[boolean] Numatytas: ne	Prevents a spatial index for the output table from being created. By default, a spatial index is added.
Continue after a failure, skipping the failed feature	SKIPFAILURES	[boolean] Numatytas: ne	Continue after a failure, skipping the failed feature.
Validate geometries based on Simple Features specification	MAKEVALID	[boolean] Numatytas: ne	Applies cleanup operations on geometries to ensure they are valid regarding the rules of the Simple Features specification.
Promote to Multipart	PROMOTETOMULTI	[boolean] Numatytas: Taip	Casts features geometry type to multipart in the output table
Keep width and precision of input attributes	PRECISION	[boolean] Numatytas: Taip	Avoids modifying column attributes to comply with input data
Additional creation options Pasirinktinis	OPTIONS	[string] Default: ‚‘ (no additional options)	Additional GDAL creation options.

Išvestys

This algorithm has no output.

Pythono kodas

Algorithm ID: gdal:importvectorintopostgisdatabasenewconnection

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

algoritmo id rodomas, kai užvedate pelę virš algoritmo apdorojimo įrankinėje. parametrų žodynas teikia parametrų pavadinimus ir reikšmes. Daugiau informacijos apie tai, kaip vykdyti apdorojimo algoritmus Pythono konsolėje rasite skyriuje Using processing algorithms from the console.

24.2.8.5. Vector Information

Creates an information file that lists information about an OGR-supported data source. The output will be shown in a ‚Result‘ window and can be written into a HTML-file. The information includes the geometry type, feature count, the spatial extent, the projection information, the list of attributes and related type, list of relations and field domains, and many more.

This algorithm is derived from the GDAL ogrinfo utility.

Parametrai

Baziniai parametrai

Užrašas	Pavadinimas	Tipas	Aprašymas
Įvesties sluoksnis	INPUT	[vector: geometry]	Įvesties vektorinis sluoksnis
Enable listing of all layers in the dataset	ALL_LAYERS	[boolean] Numatytas: ne	If checked, QGIS will output the information of all the layers in the input dataset instead of information of the first layer only. Convenient when a multi layer format (GeoPackage, GML, KML, SpatiaLite, SQLite, …) is used as input.
Summary output only	SUMMARY_ONLY	[boolean] Numatytas: Taip	Suppress listing of individual features and show only summary information like projection, schema, feature count and extents.
Suppress metadata info	NO_METADATA	[boolean] Numatytas: ne	Suppress metadata printing. Some datasets may contain a lot of metadata strings.
Layer information	OUTPUT	[html] Numatytas: [Įrašyti į laikiną failą]	Specify the output HTML file that includes the file information. One of: Įrašyti į laikiną failą Įrašyti į failą… If no HTML-file is defined the output will be written to a temporary file

Advanced parameters

Užrašas	Pavadinimas	Tipas	Aprašymas
Additional command line parameters Pasirinktinis	EXTRA	[string] Default: ‚‘ (no additional options)	Add extra GDAL command line options

Išvestys

Užrašas	Pavadinimas	Tipas	Aprašymas
Layer information	OUTPUT	[html]	The output HTML-file that includes the file information.

Pythono kodas

Algorithm ID: gdal:ogrinfo

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

algoritmo id rodomas, kai užvedate pelę virš algoritmo apdorojimo įrankinėje. parametrų žodynas teikia parametrų pavadinimus ir reikšmes. Daugiau informacijos apie tai, kaip vykdyti apdorojimo algoritmus Pythono konsolėje rasite skyriuje Using processing algorithms from the console.

24.2.8.6. Vector Information (JSON)

Creates an information file that lists information about an OGR-supported data source. The output will be shown in a ‚Result‘ window and can be written into a .JSON file. The information includes the geometry type, feature count, the spatial extent, the projection information, the list of attributes and related type, list of relations and field domains, and many more.

This algorithm is derived from the GDAL ogrinfo utility.

Requires version of GDAL >= 3.7

Parametrai

Baziniai parametrai

Užrašas	Pavadinimas	Tipas	Aprašymas
Įvesties sluoksnis	INPUT	[vector: geometry]	Įvesties vektorinis sluoksnis
Enable listing of all layers in the dataset	ALL_LAYERS	[boolean] Numatytas: ne	If checked, QGIS will output the information of all the layers in the input dataset instead of information of the first layer only. Convenient when a multi layer format (GeoPackage, GML, KML, SpatiaLite, SQLite, …) is used as input.
Enable listing of features	FEATURES	[boolean] Numatytas: ne
Suppress metadata info	NO_METADATA	[boolean] Numatytas: ne	Suppress metadata printing. Some datasets may contain a lot of metadata strings.
Layer information	OUTPUT	[file] Numatytas: [Įrašyti į laikiną failą]	Specify the output JSON file that includes the file information. One of: Įrašyti į laikiną failą Įrašyti į failą… If no JSON file is defined the output will be written to a temporary file

Advanced parameters

Užrašas	Pavadinimas	Tipas	Aprašymas
Additional command line parameters Pasirinktinis	EXTRA	[string] Default: ‚‘ (no additional options)	Add extra GDAL command line options

Išvestys

Užrašas	Pavadinimas	Tipas	Aprašymas
Layer information	OUTPUT	[file]	The output .JSON file that includes the file information.

Pythono kodas

Algorithm ID: gdal:ogrinfojson

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

algoritmo id rodomas, kai užvedate pelę virš algoritmo apdorojimo įrankinėje. parametrų žodynas teikia parametrų pavadinimus ir reikšmes. Daugiau informacijos apie tai, kaip vykdyti apdorojimo algoritmus Pythono konsolėje rasite skyriuje Using processing algorithms from the console.