qgis_linedensity: QGIS algorithm - Line density

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

QGIS algorithm - Line density

Description

QGIS Algorithm provided by QGIS (native c++) Line density (native:linedensity). The line density interpolation algorithm calculates a density measure of linear features which is obtained in a circular neighborhood within each raster cell. First, the length of the segment of each line that is intersected by the circular neighborhood is multiplied with the lines weight factor. In a second step, all length values are summed and divided by the area of the circular neighborhood. This process is repeated for all raster cells.

Usage

qgis_linedensity(
  INPUT = qgisprocess:::qgis_default_value(),
  WEIGHT = qgisprocess:::qgis_default_value(),
  RADIUS = qgisprocess:::qgis_default_value(),
  PIXEL_SIZE = qgisprocess:::qgis_default_value(),
  CREATE_OPTIONS = qgisprocess:::qgis_default_value(),
  OUTPUT = qgisprocess:::qgis_default_value(),
  ...,
  .complete_output = .complete_output_option(),
  .quiet = .quiet_option(),
  .messages = .message_option()
)

Arguments

INPUT	source - Input line layer. Path to a vector layer.
WEIGHT	field - Weight field . The name of an existing field. ; delimited list of existing field names.
RADIUS	distance - Search 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.
PIXEL_SIZE	distance - Pixel 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.
CREATE_OPTIONS	string - Creation options. 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.
OUTPUT	rasterDestination - Line density raster. 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 - Line density raster

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