qgis_heatmapkerneldensityestimation: QGIS algorithm - Heatmap (Kernel Density Estimation)

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

QGIS algorithm - Heatmap (Kernel Density Estimation)

Description

QGIS Algorithm provided by QGIS Heatmap (Kernel Density Estimation) (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.

Usage

qgis_heatmapkerneldensityestimation(
  INPUT = qgisprocess:::qgis_default_value(),
  RADIUS = qgisprocess:::qgis_default_value(),
  RADIUS_FIELD = qgisprocess:::qgis_default_value(),
  PIXEL_SIZE = qgisprocess:::qgis_default_value(),
  WEIGHT_FIELD = qgisprocess:::qgis_default_value(),
  KERNEL = qgisprocess:::qgis_default_value(),
  DECAY = qgisprocess:::qgis_default_value(),
  OUTPUT_VALUE = qgisprocess:::qgis_default_value(),
  OUTPUT = qgisprocess:::qgis_default_value(),
  ...,
  .complete_output = .complete_output_option(),
  .quiet = .quiet_option(),
  .messages = .message_option()
)

Arguments

INPUT	source - Point layer. Path to a vector layer.
RADIUS	distance - Radius. 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.
RADIUS_FIELD	field - Radius from field. The name of an existing field. ; delimited list of existing field names.
PIXEL_SIZE	number - Output raster size. 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.
WEIGHT_FIELD	field - Weight from field. The name of an existing field. ; delimited list of existing field names.
KERNEL	enum of ⁠("Quartic", "Triangular", "Uniform", "Triweight", "Epanechnikov")⁠ - Kernel shape. Number of selected option, e.g. '1'. Comma separated list of options, e.g. '1,3'.
DECAY	number - Decay ratio (Triangular kernels only). 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_VALUE	enum of ⁠("Raw", "Scaled")⁠ - Output value scaling. Number of selected option, e.g. '1'. Comma separated list of options, e.g. '1,3'.
OUTPUT	rasterDestination - Heatmap. Path for new raster 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 - outputRaster - Heatmap

JanCaha/r_package_qgis documentation built on April 4, 2024, 8:10 p.m.