QGIS algorithm - Isochrones variable speed

Source: R/sagang_isochronesvariablespeed.R

QGIS Algorithm provided by SAGA Next Gen Isochrones variable speed (sagang:isochronesvariablespeed). —————- Arguments —————- DEM: Elevation Argument type: raster Acceptable values: - Path to a raster layer SLOPE: Slope Argument type: raster Acceptable values: - Path to a raster layer FLOWACC: Catchment Area Argument type: raster Acceptable values: - Path to a raster layer CN: Curve Number (optional) Argument type: raster Acceptable values: - Path to a raster layer MANNING: Manning's N (optional) Argument type: raster Acceptable values: - Path to a raster layer TIME: Time Out(h) Argument type: rasterDestination Acceptable values: - Path for new raster layer SPEED: Speed (m/s) Argument type: rasterDestination Acceptable values: - Path for new raster layer AVGMANNING: Avg. Manning's N Default value: 0.15 Argument type: number Acceptable values: - 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 AVGCN: Avg. Curve Number Default value: 75 Argument type: number Acceptable values: - 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 THRSMIXED: Mixed Flow Threshold (ha) Default value: 18 Argument type: number Acceptable values: - 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 THRSCHANNEL: Channel Definition Threshold (ha) Default value: 360 Argument type: number Acceptable values: - 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 AVGRAINFALL: Avg. Rainfall Intensity (mm/h) Default value: 1 Argument type: number Acceptable values: - 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 CHANSLOPE: Channel side slope(m/m) Default value: 0.5 Argument type: number Acceptable values: - 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 MINSPEED: Min. Flow Speed (m/s) Default value: 0.05 Argument type: number Acceptable values: - 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 TARGET_PT_X: Target X Coordinate Default value: 0 Argument type: number Acceptable values: - 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 TARGET_PT_Y: Target Y Coordinate Default value: 0 Argument type: number Acceptable values: - 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 TARGET_PT: Target Point (optional) Argument type: source Acceptable values: - Path to a vector layer

sagang_isochronesvariablespeed(
  DEM = qgisprocess:::qgis_default_value(),
  SLOPE = qgisprocess:::qgis_default_value(),
  FLOWACC = qgisprocess:::qgis_default_value(),
  CN = qgisprocess:::qgis_default_value(),
  MANNING = qgisprocess:::qgis_default_value(),
  TIME = qgisprocess:::qgis_default_value(),
  SPEED = qgisprocess:::qgis_default_value(),
  AVGMANNING = qgisprocess:::qgis_default_value(),
  AVGCN = qgisprocess:::qgis_default_value(),
  THRSMIXED = qgisprocess:::qgis_default_value(),
  THRSCHANNEL = qgisprocess:::qgis_default_value(),
  AVGRAINFALL = qgisprocess:::qgis_default_value(),
  CHANSLOPE = qgisprocess:::qgis_default_value(),
  MINSPEED = qgisprocess:::qgis_default_value(),
  TARGET_PT_X = qgisprocess:::qgis_default_value(),
  TARGET_PT_Y = qgisprocess:::qgis_default_value(),
  TARGET_PT = qgisprocess:::qgis_default_value(),
  ...,
  .complete_output = .complete_output_option(),
  .quiet = .quiet_option(),
  .messages = .message_option()
)

Arguments

DEM

raster - Elevation. Path to a raster layer.

SLOPE

raster - Slope. Path to a raster layer.

FLOWACC

raster - Catchment Area. Path to a raster layer.

CN

raster - Curve Number. Path to a raster layer.

MANNING

raster - Manning's N. Path to a raster layer.

TIME

rasterDestination - Time Out(h). Path for new raster layer.

SPEED

rasterDestination - Speed (m/s). Path for new raster layer.

AVGMANNING

number - Avg. Manning's N. 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.

AVGCN

number - Avg. Curve Number. 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.

THRSMIXED

number - Mixed Flow Threshold (ha). 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.

THRSCHANNEL

number - Channel Definition Threshold (ha). 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.

AVGRAINFALL

number - Avg. Rainfall Intensity (mm/h). 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.

CHANSLOPE

number - Channel side slope(m/m). 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.

MINSPEED

number - Min. Flow Speed (m/s). 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.

TARGET_PT_X

number - Target X Coordinate. 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.

TARGET_PT_Y

number - Target Y Coordinate. 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.

TARGET_PT

source - Target Point. Path to a vector 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

  • SPEED - outputRaster - Speed (m/s)

  • TIME - outputRaster - Time Out(h)