QGIS Algorithm provided by GRASS r.walk.coords (grass:r.walk.coords). r.walk.coords - Creates a raster map showing the anisotropic cumulative cost of moving between different geographic locations on an input raster map whose cell category values represent cost from a list of coordinates.
grass_r_walk_coords(
elevation = qgisprocess:::qgis_default_value(),
friction = qgisprocess:::qgis_default_value(),
start_coordinates = qgisprocess:::qgis_default_value(),
stop_coordinates = qgisprocess:::qgis_default_value(),
walk_coeff = qgisprocess:::qgis_default_value(),
lambda = qgisprocess:::qgis_default_value(),
slope_factor = qgisprocess:::qgis_default_value(),
max_cost = qgisprocess:::qgis_default_value(),
null_cost = qgisprocess:::qgis_default_value(),
memory = qgisprocess:::qgis_default_value(),
.k = qgisprocess:::qgis_default_value(),
.n = qgisprocess:::qgis_default_value(),
output = qgisprocess:::qgis_default_value(),
outdir = 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()
)raster - Name of input elevation raster map. Path to a raster layer.
raster - Name of input raster map containing friction costs. Path to a raster layer.
string - Coordinates of starting point(s) (a list of E,N). 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.
string - Coordinates of stopping point(s) (a list of E,N). 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.
string - Coefficients for walking energy formula parameters a,b,c,d. 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.
number - Lambda coefficients for combining walking energy and friction cost. 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.
number - Slope factor determines travel energy cost per height step. 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.
number - Maximum cumulative cost. 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.
number - Cost assigned to null cells. By default, null cells are excluded. 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.
number - Maximum memory to be used in MB. 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.
boolean - Use the 'Knight's move'; slower, but more accurate. 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: -k.
boolean - Keep null values in output raster layer. 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: -n.
rasterDestination - Cumulative cost. Path for new raster layer.
rasterDestination - Movement Directions. Path for new raster layer.
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..
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.
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.
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()
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.
logical specifying if parameter .quiet for qgisprocess::qgis_run_algorithm() Default value is TRUE.
logical specifying if messages from qgisprocess::qgis_run_algorithm() should be printed (TRUE) or not (FALSE). Default value is FALSE.