qgis_lowestpositioninrasterstack: QGIS algorithm - Lowest position in raster stack

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

QGIS algorithm - Lowest position in raster stack

Description

QGIS Algorithm provided by QGIS (native c++) Lowest position in raster stack (native:lowestpositioninrasterstack). The lowest position algorithm evaluates on a cell-by-cell basis the position of the raster with the lowest value in a stack of rasters. Position counts start with 1 and range to the total number of input rasters. The order of the input rasters is relevant for the algorithm. If multiple rasters feature the lowest value, the first raster will be used for the position value. If multiband rasters are used in the data raster stack, the algorithm will always perform the analysis on the first band of the rasters - use GDAL to use other bands in the analysis. Any NoData cells in the raster layer stack will result in a NoData cell in the output raster unless the "ignore NoData" parameter is checked. The output NoData value can be set manually. The output rasters extent and resolution is defined by a reference raster layer and is always of int32 type.

Usage

qgis_lowestpositioninrasterstack(
  INPUT_RASTERS = qgisprocess:::qgis_default_value(),
  REFERENCE_LAYER = qgisprocess:::qgis_default_value(),
  IGNORE_NODATA = qgisprocess:::qgis_default_value(),
  OUTPUT_NODATA_VALUE = qgisprocess:::qgis_default_value(),
  OUTPUT = qgisprocess:::qgis_default_value(),
  ...,
  .complete_output = .complete_output_option(),
  .quiet = .quiet_option(),
  .messages = .message_option()
)

Arguments

INPUT_RASTERS	multilayer - Input raster layers. .
REFERENCE_LAYER	raster - Reference layer. Path to a raster layer.
IGNORE_NODATA	boolean - Ignore NoData values. 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.
OUTPUT_NODATA_VALUE	number - Output NoData value. 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.
OUTPUT	rasterDestination - Output layer. Path for new raster 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

• CRS_AUTHID - outputString - CRS authority identifier

• EXTENT - outputString - Extent

• HEIGHT_IN_PIXELS - outputNumber - Height in pixels

• OUTPUT - outputRaster - Output layer

• TOTAL_PIXEL_COUNT - outputNumber - Total pixel count

• WIDTH_IN_PIXELS - outputNumber - Width in pixels

JanCaha/r_package_qgis documentation built on April 4, 2024, 8:10 p.m.