grass_r_fill_dir: QGIS algorithm - r.fill.dir

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

QGIS algorithm - r.fill.dir

Description

QGIS Algorithm provided by GRASS r.fill.dir (grass:r.fill.dir). Filters and generates a depressionless elevation layer and a flow direction layer from a given elevation raster layer.

Usage

grass_r_fill_dir(
  input = qgisprocess:::qgis_default_value(),
  format = qgisprocess:::qgis_default_value(),
  .f = qgisprocess:::qgis_default_value(),
  output = qgisprocess:::qgis_default_value(),
  direction = qgisprocess:::qgis_default_value(),
  areas = qgisprocess:::qgis_default_value(),
  GRASS_REGION_PARAMETER = qgisprocess:::qgis_default_value(),
  GRASS_REGION_CELLSIZE_PARAMETER = qgisprocess:::qgis_default_value(),
  GRASS_RASTER_FORMAT_OPT = qgisprocess:::qgis_default_value(),
  GRASS_RASTER_FORMAT_META = qgisprocess:::qgis_default_value(),
  ...,
  .complete_output = .complete_output_option(),
  .quiet = .quiet_option(),
  .messages = .message_option()
)

Arguments

input	raster - Elevation. Path to a raster layer.
format	enum of ⁠("grass", "agnps", "answers")⁠ - Output aspect direction format. Number of selected option, e.g. '1'. Comma separated list of options, e.g. '1,3'.
.f	boolean - Find unresolved areas only. 1 for true/yes. 0 for false/no. 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. Original algorithm parameter name: -f.
output	rasterDestination - Depressionless DEM. Path for new raster layer.
direction	rasterDestination - Flow direction. Path for new raster layer.
areas	rasterDestination - Problem areas. Path for new raster layer.
GRASS_REGION_PARAMETER	extent - GRASS GIS region extent. A comma delimited string of x min, x max, y min, y max. E.g. '4,10,101,105'. Path to a layer. The extent of the layer is used..
GRASS_REGION_CELLSIZE_PARAMETER	number - GRASS GIS region cellsize (leave 0 for default). 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.
GRASS_RASTER_FORMAT_OPT	string - Output Rasters format options (createopt). 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.
GRASS_RASTER_FORMAT_META	string - Output Rasters format metadata options (metaopt). 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.
...	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

• areas - outputRaster - Problem areas

• direction - outputRaster - Flow direction

• output - outputRaster - Depressionless DEM

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