28.1.8. Mesh

28.1.8.1. Export contours 

Creates contours as a vector layer from a mesh scalar dataset.

Parameters

Label	Name	Type	Description
Input mesh layer	`INPUT`	[mesh]	The mesh layer to export data from
Dataset groups	`DATASET_GROUPS`	[layer] [list]	The dataset groups
Dataset time	`DATASET_TIME`	[datetime]	The time range to take into account 0 — Current canvas time 1 — Defined date/time 2 — Dataset group time step
Increment between contour levels Optional	`INCREMENT`	[number] Default: Not set	Interval between generated levels.
Minimum contour level Optional	`MINIMUM`	[number] Default: Not set	Starting level values of contours.
Maximum contour level Optional	`MAXIMUM`	[number] Default: Not set	Maximum values of contours, i.e. no generated levels will be greater than this value.
List of contours level Optional	`CONTOUR_LEVEL_LIST`	[number] Default: Not set	List of wanted levels of contours (separated by commas). If filled, the increment, minimum, and maximum fields will not be considered.
Output coordinate system Optional	`CRS_OUTPUT`	[crs]	Coordinate Reference System to assign to the output
Exported contour lines	`OUTPUT_LINES`	[vector: line] Default: `[Create temporary layer]`	Specify the output line layer representing the contours of the mesh layer. 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.
Exported contour polygons	`OUTPUT_POLYGONS`	[vector: polygon] Default: `[Create temporary layer]`	Specify the output polygon layer representing the contours of the mesh layer. 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
Exported contour lines	`OUTPUT_LINES`	[vector: line]	Line layer representing the contours of the mesh layer.
Exported contour polygons	`OUTPUT_POLYGONS`	[vector: polygon]	Polygon layer representing the contours of the mesh layer.

Python code

Algorithm ID: native:meshcontours

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.

28.1.8.2. Export cross section dataset values on lines from mesh 

Extracts a mesh dataset’s values from lines contained in a vector layer.

Each line is discretized with a resolution distance parameter for extraction of values on its vertices.

Parameters

Label	Name	Type	Description
Input mesh layer	`INPUT`	[mesh]	The mesh layer to export data from
Dataset groups	`DATASET_GROUPS`	[layer] [list]	The dataset groups
Dataset time	`DATASET_TIME`	[datetime]	The time range to take into account 0 — Current canvas time 1 — Defined date/time 2 — Dataset group time step
Lines for data export	`INPUT_LINES`	[vector: line]	Lines where the data will be extracted from the dataset mesh
Line segmentation resolution	`RESOLUTION`	[number] Default: 10.0	The distance between points on the lines where the data will be extracted from the dataset mesh.
Digits count for dataset value	`DATASET_DIGITS`	[number] Default: 2	Number of digits to round dataset values
Exported data CSV file	`OUTPUT`	[file] Default: `[Save to temporary file]`	Specification of the output file. One of: Save to a Temporary File Save to File…

Outputs

Label	Name	Type	Description
Exported data CSV file	`OUTPUT`	[file]

Python code

Algorithm ID: native:meshexportcrosssection

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.

28.1.8.3. Export mesh edges 

Exports a mesh layer’s edges to a line vector layer, with the dataset values on edges as attribute values.

Parameters

Label	Name	Type	Description
Input mesh layer	`INPUT`	[mesh]	The mesh layer to export data from
Dataset groups	`DATASET_GROUPS`	[layer] [list]	The dataset groups
Dataset time	`DATASET_TIME`	[datetime]	The time range to take into account 0 — Current canvas time 1 — Defined date/time 2 — Dataset group time step
Output coordinate system Optional	`CRS_OUTPUT`	[crs]	Coordinate Reference System to assign to the output
Export vector option	`VECTOR_OPTION`	[enumeration]	Coordinate type of vector value exportation. 0 — Cartesian (x,y) 1 — Polar (magnitude, degree) 2 — Cartesian and polar
Output vector layer	`OUTPUT`	[vector: line] Default: `[Create temporary layer]`	Specification of the output file. 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 vector layer	`OUTPUT`	[vector: line]	Output vector line layer containing the edges of the input mesh layer with associated dataset values

Python code

Algorithm ID: native:exportmeshedges

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.

28.1.8.4. Export mesh faces 

Exports a mesh layer’s faces to a polygon vector layer, with the dataset values on faces as attribute values.

Parameters

Label	Name	Type	Description
Input mesh layer	`INPUT`	[mesh]	The mesh layer to export data from
Dataset groups	`DATASET_GROUPS`	[layer] [list]	The dataset groups
Dataset time	`DATASET_TIME`	[datetime]	The time range to take into account 0 — Current canvas time 1 — Defined date/time 2 — Dataset group time step
Output coordinate system Optional	`CRS_OUTPUT`	[crs]	Coordinate Reference System to assign to the output
Export vector option	`VECTOR_OPTION`	[enumeration]	Coordinate type of vector value exportation. 0 — Cartesian (x,y) 1 — Polar (magnitude, degree) 2 — Cartesian and polar
Output vector layer	`OUTPUT`	[vector: polygon] Default: `[Create temporary layer]`	Specification of the output file. 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 vector layer	`OUTPUT`	[vector: polygon]	Output vector polygon layer containing the faces of the input mesh layer with associated dataset values

Python code

Algorithm ID: native:exportmeshfaces

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.

28.1.8.5. Export mesh on grid 

Exports a mesh layer’s dataset values to a gridded point vector layer, with the dataset values on this point as attribute values.

For data on volume (3D stacked dataset values), the exported dataset values are averaged on faces using the method defined in the mesh layer properties (default is Multi level averaging method). 1D meshes are not supported.

Parameters

Label	Name	Type	Description
Input mesh layer	`INPUT`	[mesh]	The mesh layer to export data from
Dataset groups	`DATASET_GROUPS`	[layer] [list]	The dataset groups
Dataset time	`DATASET_TIME`	[datetime]	The time range to take into account 0 — Current canvas time 1 — Defined date/time 2 — Dataset group time step
Extent Optional	`EXTENT`	[extent]	Specify the spatial extent on which to process the data. 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`
Grid spacing Optional	`GRID_SPACING`	[number] Default: 10.0	Spacing between the sample points to use
Output coordinate system Optional	`CRS_OUTPUT`	[crs]	Coordinate Reference System to assign to the output
Export vector option	`VECTOR_OPTION`	[enumeration]	Coordinate type of vector value exportation. 0 — Cartesian (x,y) 1 — Polar (magnitude, degree) 2 — Cartesian and polar
Output vector layer	`OUTPUT`	[vector: point] Default: `[Create temporary layer]`	Specification of the output file. 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 vector layer	`OUTPUT`	[vector: point]	Output vector point layer with dataset values computed from the overlaid face.

Python code

Algorithm ID: native:exportmeshongrid

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.

28.1.8.6. Export mesh vertices 

Exports a mesh layer’s vertices to a point vector layer, with the dataset values on vertices as attribute values.

Parameters

Label	Name	Type	Description
Input mesh layer	`INPUT`	[mesh]	The mesh layer to export data from
Dataset groups	`DATASET_GROUPS`	[layer] [list]	The dataset groups
Dataset time	`DATASET_TIME`	[datetime]	The time range to take into account 0 — Current canvas time 1 — Defined date/time 2 — Dataset group time step
Output coordinate system Optional	`CRS_OUTPUT`	[crs]	Coordinate Reference System to assign to the output
Export vector option	`VECTOR_OPTION`	[enumeration]	Coordinate type of vector value exportation. 0 — Cartesian (x,y) 1 — Polar (magnitude, degree) 2 — Cartesian and polar
Output vector layer	`OUTPUT`	[vector: point] Default: `[Create temporary layer]`	Specification of the output file. 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 vector layer	`OUTPUT`	[vector: point]	Output vector point layer containing the vertices of the input mesh layer with associated dataset values

Python code

Algorithm ID: native:exportmeshvertices

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.

28.1.8.7. Export time series values from points of a mesh dataset 

Extracts a mesh dataset’s time series values from points contained in a vector layer.

If the time step is kept to its default value (0 hours), the time step used is the one of the two first datasets of the first selected dataset group.

Parameters

Label	Name	Type	Description
Input mesh layer	`INPUT`	[mesh]	The mesh layer to extract data from
Dataset groups	`DATASET_GROUPS`	[layer] [list]	The dataset groups
Starting time	`STARTING_TIME`	[datetime]	The start of the time range to take into account 0 — Current canvas time 1 — Defined date/time 2 — Dataset group time step
Finishing time	`FINISHING_TIME`	[datetime]	The end of the time range to take into account 0 — Current canvas time 1 — Defined date/time 2 — Dataset group time step
Time step (hours) Optional	`TIME_STEP`	[number] Default: 0	Time between two consecutive steps to extract. Keep `0` to use time step of the first selected dataset group.
Points for data export	`INPUT_POINTS`	[vector: point]	Vector layer containing points where the data will be extracted from the dataset mesh
Digits count for coordinates	`COORDINATES_DIGITS`	[number]	Number of digits to round coordinate values Default: 2
Digits count for dataset value	`DATASET_DIGITS`	[number] Default: 2	Number of digits to round dataset values
Exported data CSV file	`OUTPUT`	[file] Default: `[Save to temporary file]`	Specification of the output file. One of: Save to a Temporary File Save to File…

Outputs

Label	Name	Type	Description
Exported data CSV file	`OUTPUT`	[file]	`.CSV` file containing the mesh dataset time series values at the overlaying point features

Python code

Algorithm ID: native:meshexporttimeseries

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.

28.1.8.8. Rasterize mesh dataset 

Creates a raster layer from a mesh dataset.

For data on volume (3D stacked dataset values), the exported dataset values are averaged on faces using the method defined in the mesh layer properties (default is Multi level averaging method). 1D meshes are not supported.

Parameters

Basic parameters

Label	Name	Type	Description
Input mesh layer	`INPUT`	[mesh]	The mesh layer to export data from
Dataset groups	`DATASET_GROUPS`	[layer] [list]	The dataset groups
Dataset time	`DATASET_TIME`	[datetime]	The time range to take into account 0 — Current canvas time 1 — Defined date/time 2 — Dataset group time step
Extent Optional	`EXTENT`	[extent]	Specify the spatial extent on which to process the data. 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`
Pixel size	`PIXEL_SIZE`	[number] Default: 1.0	Pixel size of the output raster layer.
Output coordinate system Optional	`CRS_OUTPUT`	[crs]	Coordinate Reference System to assign to the output
Output raster layer	`OUTPUT`	[raster] Default: `[Save to temporary file]`	Specification of the output file. One of: Save to a Temporary File Save to File…

Advanced parameters

Label

Name

Type

Description

Creation options

Optional

CREATE_OPTIONS

[string]

Default: ‘’

For adding one or more creation options that control the raster to be created (colors, block size, file compression…). For convenience, you can rely on predefined profiles (see GDAL driver options section).

Batch Process and Model Designer: separate multiple options with a pipe character (|).

Outputs

Label	Name	Type	Description
Output raster layer	`OUTPUT`	[raster]	Output raster layer with dataset values computed from the mesh layer.

Python code

Algorithm ID: native:meshrasterize

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.

28.1.8.9. TIN mesh creation 

Creates a TIN mesh layer from vector layers. The TIN mesh is created using a Delaunay triangulation.

Parameters

Label	Name	Type	Description
Input layers	`SOURCE_DATA`	[vector: any] [list]	Vector layers to combine to generate the mesh layer
Vector layer	GUI ONLY	[vector: any] [list]	A selector for the vector layers to combine to generate the mesh layer
Value on vertex	GUI ONLY	[tablefield: any]	A selector of the field to use from the selected layer. Each vertex is assigned the corresponding value of its original feature.
Use Z-coordinate for value on vertex	GUI ONLY	[boolean] Default: False	If checked, the Z value of vector layer points or polygons/lines vertices will be used to assign the Z value of the vertex mesh layer. Only available if the input layers are 3D.
Output format	`MESH_FORMAT`	[enumeration] Default: 2DM	Output format of the generated layer 0 — 2DM 1 — SELAFIN 2 — PLY 3 — Ugrid
Output coordinate system Optional	`CRS_OUTPUT`	[crs]	Coordinate Reference System to assign to the output
Output file	`OUTPUT_MESH`	[mesh] Default: `[Save to temporary file]`	Specification of the output file. One of: Save to a Temporary File Save to File…

Outputs

Label	Name	Type	Description
Output file	`OUTPUT_MESH`	[mesh]	Output mesh layer with dataset values computed from the vector layers.

Python code

Algorithm ID: native:tinmeshcreation

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.