QGIS algorithm - Growing degree days

Source: R/sagang_growingdegreedays.R

QGIS Algorithm provided by SAGA Next Gen Growing degree days (sagang:growingdegreedays). ---------------- Arguments ---------------- TMEAN: Mean Monthly Temperatures Argument type: multilayer TBASE: Base Temperature Default value: 10 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 NGDD: Number of Days above Base Temperature Argument type: rasterDestination Acceptable values: - Path for new raster layer TSUM: Growing Degree Days Argument type: rasterDestination Acceptable values: - Path for new raster layer FIRST: First Growing Degree Day Argument type: rasterDestination Acceptable values: - Path for new raster layer LAST: Last Growing Degree Day Argument type: rasterDestination Acceptable values: - Path for new raster layer TARGET: Degree Sum Target Day Argument type: rasterDestination Acceptable values: - Path for new raster layer TTARGET: Degree Sum Default value: 100 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

sagang_growingdegreedays(
  TMEAN = qgisprocess:::qgis_default_value(),
  TBASE = qgisprocess:::qgis_default_value(),
  NGDD = qgisprocess:::qgis_default_value(),
  TSUM = qgisprocess:::qgis_default_value(),
  FIRST = qgisprocess:::qgis_default_value(),
  LAST = qgisprocess:::qgis_default_value(),
  TARGET = qgisprocess:::qgis_default_value(),
  TTARGET = qgisprocess:::qgis_default_value(),
  ...,
  .complete_output = .complete_output_option(),
  .quiet = .quiet_option(),
  .messages = .message_option()
)

Arguments

TMEAN

multilayer - Mean Monthly Temperatures. .

TBASE

number - Base Temperature. 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.

NGDD

rasterDestination - Number of Days above Base Temperature. Path for new raster layer.

TSUM

rasterDestination - Growing Degree Days. Path for new raster layer.

FIRST

rasterDestination - First Growing Degree Day. Path for new raster layer.

LAST

rasterDestination - Last Growing Degree Day. Path for new raster layer.

TARGET

rasterDestination - Degree Sum Target Day. Path for new raster layer.

TTARGET

number - Degree Sum. 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.

...

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

  • FIRST - outputRaster - First Growing Degree Day

  • LAST - outputRaster - Last Growing Degree Day

  • NGDD - outputRaster - Number of Days above Base Temperature

  • TARGET - outputRaster - Degree Sum Target Day

  • TSUM - outputRaster - Growing Degree Days