qgis_randompointsinsidepolygons: QGIS algorithm - Random points inside polygons

In JanCaha/r_package_qgis: An extension of package "qgisprocess" providing direct R functions for QGIS functions

QGIS algorithm - Random points inside polygons

Description

QGIS Algorithm provided by QGIS Random points inside polygons (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. —————- Notes —————- - This algorithm drops existing primary keys or FID values and regenerates them in output layers.

Usage

qgis_randompointsinsidepolygons(
  INPUT = qgisprocess:::qgis_default_value(),
  STRATEGY = qgisprocess:::qgis_default_value(),
  VALUE = qgisprocess:::qgis_default_value(),
  MIN_DISTANCE = qgisprocess:::qgis_default_value(),
  OUTPUT = qgisprocess:::qgis_default_value(),
  ...,
  .complete_output = .complete_output_option(),
  .quiet = .quiet_option(),
  .messages = .message_option()
)

Arguments

INPUT	source - Input layer. Path to a vector layer.
STRATEGY	enum of ⁠("Points count", "Points density")⁠ - Sampling strategy. Number of selected option, e.g. '1'. Comma separated list of options, e.g. '1,3'.
VALUE	number - Point count or density. 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.
MIN_DISTANCE	distance - Minimum distance between points. 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.
OUTPUT	sink - Random points. Path for new vector layer.
...	further parameters passed to qgisprocess::qgis_run_algorithm()
.complete_output	logical specifying if complete out of qgisprocess::qgis_run_algorithm() should be used (TRUE) or first output (most likely the main) should read (FALSE). Default value is TRUE.
.quiet	logical specifying if parameter .quiet for qgisprocess::qgis_run_algorithm() Default value is TRUE.
.messages	logical specifying if messages from qgisprocess::qgis_run_algorithm() should be printed (TRUE) or not (FALSE). Default value is FALSE.

Details

Outputs description

• OUTPUT - outputVector - Random points

JanCaha/r_package_qgis documentation built on Nov. 3, 2024, 5:25 p.m.