QGIS algorithm - Slope, aspect, curvature

Source: R/sagang_slopeaspectcurvature.R

QGIS Algorithm provided by SAGA Next Gen Slope, aspect, curvature (sagang:slopeaspectcurvature). —————- Arguments —————- ELEVATION: Elevation Argument type: raster Acceptable values: - Path to a raster layer SLOPE: Slope Argument type: rasterDestination Acceptable values: - Path for new raster layer ASPECT: Aspect Argument type: rasterDestination Acceptable values: - Path for new raster layer C_GENE: General Curvature Argument type: rasterDestination Acceptable values: - Path for new raster layer C_PROF: Profile Curvature Argument type: rasterDestination Acceptable values: - Path for new raster layer C_PLAN: Plan Curvature Argument type: rasterDestination Acceptable values: - Path for new raster layer C_TANG: Tangential Curvature Argument type: rasterDestination Acceptable values: - Path for new raster layer C_LONG: Longitudinal Curvature Argument type: rasterDestination Acceptable values: - Path for new raster layer C_CROS: Cross-Sectional Curvature Argument type: rasterDestination Acceptable values: - Path for new raster layer C_MINI: Minimal Curvature Argument type: rasterDestination Acceptable values: - Path for new raster layer C_MAXI: Maximal Curvature Argument type: rasterDestination Acceptable values: - Path for new raster layer C_TOTA: Total Curvature Argument type: rasterDestination Acceptable values: - Path for new raster layer C_ROTO: Flow Line Curvature Argument type: rasterDestination Acceptable values: - Path for new raster layer METHOD: Method Default value: 6 Argument type: enum Available values: - 0: (0) maximum slope (Travis et al. 1975) - 1: (1) maximum triangle slope (Tarboton 1997) - 2: (2) least squares fitted plane (Horn 1981, Costa-Cabral & Burgess 1996) - 3: (3) 6 parameter 2nd order polynom (Evans 1979) - 4: (4) 6 parameter 2nd order polynom (Heerdegen & Beran 1982) - 5: (5) 6 parameter 2nd order polynom (Bauer, Rohdenburg, Bork 1985) - 6: (6) 9 parameter 2nd order polynom (Zevenbergen & Thorne 1987) - 7: (7) 10 parameter 3rd order polynom (Haralick 1983) - 8: (8) 10 parameter 3rd order polynom (Florinsky 2009) Acceptable values: - Number of selected option, e.g. '1' - Comma separated list of options, e.g. '1,3' UNIT_SLOPE: Unit Default value: 0 Argument type: enum Available values: - 0: (0) radians - 1: (1) degree - 2: (2) percent rise Acceptable values: - Number of selected option, e.g. '1' - Comma separated list of options, e.g. '1,3' UNIT_ASPECT: Unit Default value: 0 Argument type: enum Available values: - 0: (0) radians - 1: (1) degree Acceptable values: - Number of selected option, e.g. '1' - Comma separated list of options, e.g. '1,3'

sagang_slopeaspectcurvature(
  ELEVATION = qgisprocess:::qgis_default_value(),
  SLOPE = qgisprocess:::qgis_default_value(),
  ASPECT = qgisprocess:::qgis_default_value(),
  C_GENE = qgisprocess:::qgis_default_value(),
  C_PROF = qgisprocess:::qgis_default_value(),
  C_PLAN = qgisprocess:::qgis_default_value(),
  C_TANG = qgisprocess:::qgis_default_value(),
  C_LONG = qgisprocess:::qgis_default_value(),
  C_CROS = qgisprocess:::qgis_default_value(),
  C_MINI = qgisprocess:::qgis_default_value(),
  C_MAXI = qgisprocess:::qgis_default_value(),
  C_TOTA = qgisprocess:::qgis_default_value(),
  C_ROTO = qgisprocess:::qgis_default_value(),
  METHOD = qgisprocess:::qgis_default_value(),
  UNIT_SLOPE = qgisprocess:::qgis_default_value(),
  UNIT_ASPECT = qgisprocess:::qgis_default_value(),
  ...,
  .complete_output = .complete_output_option(),
  .quiet = .quiet_option(),
  .messages = .message_option()
)

Arguments

ELEVATION

raster - Elevation. Path to a raster layer.

SLOPE

rasterDestination - Slope. Path for new raster layer.

ASPECT

rasterDestination - Aspect. Path for new raster layer.

C_GENE

rasterDestination - General Curvature. Path for new raster layer.

C_PROF

rasterDestination - Profile Curvature. Path for new raster layer.

C_PLAN

rasterDestination - Plan Curvature. Path for new raster layer.

C_TANG

rasterDestination - Tangential Curvature. Path for new raster layer.

C_LONG

rasterDestination - Longitudinal Curvature. Path for new raster layer.

C_CROS

rasterDestination - Cross-Sectional Curvature. Path for new raster layer.

C_MINI

rasterDestination - Minimal Curvature. Path for new raster layer.

C_MAXI

rasterDestination - Maximal Curvature. Path for new raster layer.

C_TOTA

rasterDestination - Total Curvature. Path for new raster layer.

C_ROTO

rasterDestination - Flow Line Curvature. Path for new raster layer.

METHOD

enum of ("(0) maximum slope (Travis et al. 1975)", "(1) maximum triangle slope (Tarboton 1997)", "(2) least squares fitted plane (Horn 1981, Costa-Cabral & Burgess 1996)", "(3) 6 parameter 2nd order polynom (Evans 1979)", "(4) 6 parameter 2nd order polynom (Heerdegen & Beran 1982)", "(5) 6 parameter 2nd order polynom (Bauer, Rohdenburg, Bork 1985)", "(6) 9 parameter 2nd order polynom (Zevenbergen & Thorne 1987)", "(7) 10 parameter 3rd order polynom (Haralick 1983)", "(8) 10 parameter 3rd order polynom (Florinsky 2009)") - Method. Number of selected option, e.g. '1'. Comma separated list of options, e.g. '1,3'.

UNIT_SLOPE

enum of ("(0) radians", "(1) degree", "(2) percent rise") - Unit. Number of selected option, e.g. '1'. Comma separated list of options, e.g. '1,3'.

UNIT_ASPECT

enum of ("(0) radians", "(1) degree") - Unit. Number of selected option, e.g. '1'. Comma separated list of options, e.g. '1,3'.

...

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

  • ASPECT - outputRaster - Aspect

  • C_CROS - outputRaster - Cross-Sectional Curvature

  • C_GENE - outputRaster - General Curvature

  • C_LONG - outputRaster - Longitudinal Curvature

  • C_MAXI - outputRaster - Maximal Curvature

  • C_MINI - outputRaster - Minimal Curvature

  • C_PLAN - outputRaster - Plan Curvature

  • C_PROF - outputRaster - Profile Curvature

  • C_ROTO - outputRaster - Flow Line Curvature

  • C_TANG - outputRaster - Tangential Curvature

  • C_TOTA - outputRaster - Total Curvature

  • SLOPE - outputRaster - Slope