28.1.7. Layer tools

28.1.7.1. Export layer(s) information

Creates a polygon layer with features corresponding to the extent of selected layer(s).

Additional layer details (CRS, provider name, file path, layer name, subset filter, abstract and attribution) are attached as attributes to each feature.

Parameters

Label	Name	Type	Description
Input layers	LAYERS	[vector: any] [list]	Input vector layers to get information on.
Output	OUTPUT	[vector: polygon] Default: [Create temporary layer]	Specification of the output layer with information. One of: Create Temporary Layer (TEMPORARY_OUTPUT) Save to File… Save to Geopackage… Save to Database Table… The file encoding can also be changed here.

Outputs

Label	Name	Type	Description
Output	OUTPUT	[vector: polygon]	Polygon vector layer showing extent of input layers and associated information in attributes.

Python code

Algorithm ID: native:exportlayersinformation

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.

28.1.7.2. Export to spreadsheet

Exports the attributes of a selection of vector layers into a spreadsheet document or optionally appends them to an existing spreadsheet as additional sheets.

Parameters

Label	Name	Type	Description
Input layers	LAYERS	[vector: any] [list]	Input vector layers. The output spreadsheet will consist of a sheet, for each layer, that contains the attributes of this layer.
Use field aliases as column headings	USE_ALIAS	[boolean] Default: False	Use the field aliases from the attribute table for the spreadsheet.
Export formatted values instead of raw values	FORMATTED_VALUES	[boolean] Default: False	If True, exports the formatted, human readable values (e.g., from a value map or value relation) to the spreadsheet.
Overwrite existing spreadsheet	OVERWRITE	[boolean] Default: True	If the specified spreadsheet exists, setting this option to True will overwrite the existing spreadsheet. If this option is False and the spreadsheet exists, the layers will be appended as additional sheets.
Destination spreadsheet	OUTPUT	[file] Default: [Save to temporary file]	Output spreadsheet with a sheet for every layer. One of: Save to a Temporary File Save to File…

Outputs

Label	Name	Type	Description
Destination spreadsheet	OUTPUT	[file]	Spreadsheet with a sheet for every layer.
Layers within spreadsheet	OUTPUT_LAYERS	[list]	The list of sheets added to the spreadsheet.

Python code

Algorithm ID: native:exporttospreadsheet

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.

28.1.7.3. Extract layer extent

Generates a vector layer with the minimum bounding box (rectangle with N-S orientation) that covers all the input features.

The output layer contains a single bounding box for the whole input layer.

Fig. 28.7 In red the bounding box of the source layer

Default menu: Vector ► Research Tools

Parameters

Label	Name	Type	Description
Layer	INPUT	[layer]	Input layer
Extent	OUTPUT	[vector: polygon] Default: [Create temporary layer]	Specify the polygon vector layer for the output extent. One of: Create Temporary Layer (TEMPORARY_OUTPUT) Save to File… Save to Geopackage… Save to Database Table… The file encoding can also be changed here.

Outputs

Label	Name	Type	Description
Extent	OUTPUT	[vector: polygon]	Output (polygon) vector layer with the extent (minimum bounding box)

Python code

Algorithm ID: qgis:polygonfromlayerextent

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.