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[processing] add missing algs descriptions in qgis.yaml
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agiudiceandrea authored and nyalldawson committed Dec 2, 2021
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45 changes: 44 additions & 1 deletion python/plugins/processing/algs/help/qgis.yaml
Expand Up @@ -63,6 +63,13 @@ qgis:eliminateselectedpolygons: >
This algorithm combines selected polygons of the input layer with certain adjacent polygons by erasing their common boundary. The adjacent polygon can be either the one with the largest or smallest area or the one sharing the largest common boundary with the polygon to be eliminated.
Eliminate is normally used to get rid of sliver polygons, i.e. tiny polygons that are a result of polygon intersection processes where boundaries of the inputs are similar but not identical.

qgis:executesql: >
Runs a simple or complex query with SQL syntax on the source layer.

Input datasources are identified with input1, input2, ..., inputN and a simple query will look like: SELECT * FROM input1

The result of the query will be added as a new layer.

qgis:exportaddgeometrycolumns: >
This algorithm computes geometric properties of the features in a vector layer. It generates a new vector layer with the same content as the input one, but with additional attributes in its attributes table, containing geometric measurements.

Expand All @@ -79,9 +86,19 @@ qgis:generatepointspixelcentroidsalongline: >
This algorithm generates a point vector layer from an input raster and line layer.
The points correspond to the pixel centroids that intersect the line layer.

qgis:heatmapkerneldensityestimation: >
Creates a density (heatmap) raster of an input point vector layer using kernel density estimation. Heatmaps allow easy identification of hotspots and clustering of points.

The density is calculated based on the number of points in a location, with larger numbers of clustered points resulting in larger values.

qgis:hypsometriccurves: >
This algorithm computes hypsometric curves for an input Digital Elevation Model. Curves are produced as table files in an output folder specified by the user.

qgis:idwinterpolation: >
Generates an Inverse Distance Weighted (IDW) interpolation of a point vector layer.

Sample points are weighted during interpolation such that the influence of one point relative to another declines with distance from the unknown point you want to create.

qgis:importintospatialite: >
This algorithm imports a vector layer into a SpatiaLite database, creating a new table.

Expand Down Expand Up @@ -110,7 +127,7 @@ qgis:linestopolygons: >
qgis:listuniquevalues: >
This algorithm generates a report with information about the unique values found in a given attribute (or attributes) of a vector layer.

qgis:meanandstandarddeviationplot:
qgis:meanandstandarddeviationplot: >
This algorithm creates a box plot with mean and standard deviation values.

qgis:minimumboundinggeometry: >
Expand Down Expand Up @@ -149,6 +166,13 @@ qgis:randompointsalongline: >
qgis:randompointsinlayerbounds: >
This algorithm creates a new point layer with a given number of random points, all of them within the extent of a given layer. A distance factor can be specified, to avoid points being too close to each other.

qgis:randompointsinsidepolygons: >
This algorithm creates a new point layer with random points inside the polygons of a given layer.

The number of points in each polygon can be defined as a fixed count or as a density value. The count/density value could also be taken from an attribute or an expression specified using the "Data defined override" functionality, so it can be different for each polygon in the input layer.

A minimum distance can be specified, to avoid points being too close to each other.

qgis:randomselection: >
This algorithm takes a vector layer and selects a subset of its features. No new layer is generated by this algorithm.

Expand Down Expand Up @@ -210,6 +234,25 @@ qgis:statisticsbycategories: >
qgis:texttofloat: >
This algorithm modifies the type of a given attribute in a vector layer, converting a text attribute containing numeric strings into a numeric attribute.

qgis:tilesxyzdirectory: >
This algorithm generates raster XYZ tiles of map canvas content.

Tile images are saved as individual images in directory structure.

qgis:tilesxyzmbtiles: >
This algorithm generates raster XYZ tiles of map canvas content.

Tile images are saved as a single file in the “MBTiles” format.

qgis:tininterpolation: >
Generates a Triangulated Irregular Network (TIN) interpolation of a point vector layer.

With the TIN method you can create a surface formed by triangles of nearest neighbor points.
To do this, circumcircles around selected sample points are created and their intersections are connected to a network of non overlapping and as compact as possible triangles.
The resulting surfaces are not smooth.

The algorithm creates both the raster layer of the interpolated values and the vector line layer with the triangulation boundaries.

qgis:topologicalcoloring: >
This algorithm assigns a color index to polygon features in such a way that no adjacent polygons share the same color index, whilst minimizing the number of colors required.

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