Random points from categorized raster layer

This algorithm creates a new point layer with a given number of random points, all of them within the categories of the given categorized raster layer.

Usage:

1. Start the algorithm from the Processing Toolbox panel.

2. Select a categorized raster layer to process define the number of points per class as well as your distance settings. Then click run.

   

Parameters

Categorized raster layer [raster]

A categorized raster layer to draw points from.

Number of points per category [string]

Number of points to draw from each category. Set a single value N to draw N points for each category. Set a list of values N1, N2, … Ni, … to draw Ni points for category i.

Minimum distance between points (in meters) [number]

A minimum (Euclidean) distance between points can be specified.

Default: 0

Minimum distance between points inside category (in meters) [number]

A minimum (Euclidean) distance between points in a category can be specified.

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:RandomPointsFromCategorizedRasterLayer:

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Arguments
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stratification: Categorized raster layer
    Argument type:  raster
    Acceptable values:
            - Path to a raster layer
n: Number of points per category
    Argument type:  string
    Acceptable values:
            - String 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
distanceGlobal: 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
distanceStatum: Minimum distance between points inside category (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
----------------

outputPoints: <outputVector>
    Output point layer