Random points from mask raster layer
This algorithm creates a new point layer with a given number of random points, all of them in the area where the given mask evaluates to true.
Usage:
Start the algorithm from the Processing Toolbox panel.
Select a categorized raster layer to process define the number of points as well as your distance settings. Then click run.
Parameters
- Mask raster layer [raster]
A mask raster layer to draw locations from.
- Number of points [number]
Number of points to be drawn.
- Minimum distance between points (in meters) [number]
A minimum distance between points can be specified. A point will not be added if there is an already generated point within this (Euclidean) distance from the generated location.
Default: 0
- Random seed [number]
The seed for the random generator can be provided.
Outputs
- Output point layer [vectorDestination]
Vector file destination.
Command-line usage
>qgis_process help enmapbox:RandomPointsFromMaskRasterLayer
:
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Arguments
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mask: Mask raster layer
Argument type: raster
Acceptable values:
- Path to a raster layer
n: Number of points
Argument type: number
Acceptable values:
- A numeric value
- field:FIELD_NAME to use a data defined value taken from the FIELD_NAME field
- expression:SOME EXPRESSION to use a data defined value calculated using a custom QGIS expression
distance: Minimum distance between points (in meters)
Default value: 0
Argument type: number
Acceptable values:
- A numeric value
- field:FIELD_NAME to use a data defined value taken from the FIELD_NAME field
- expression:SOME EXPRESSION to use a data defined value calculated using a custom QGIS expression
seed: Random seed (optional)
Argument type: number
Acceptable values:
- A numeric value
- field:FIELD_NAME to use a data defined value taken from the FIELD_NAME field
- expression:SOME EXPRESSION to use a data defined value calculated using a custom QGIS expression
outputPoints: Output point layer
Argument type: vectorDestination
Acceptable values:
- Path for new vector layer
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Outputs
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outputPoints: <outputVector>
Output point layer