QGIS Algorithm provided by QGIS (native c++) Less than frequency (native:lessthanfrequency). The Less than frequency algorithm evaluates on a cell-by-cell basis the frequency (number of times) the values of an input stack of rasters are less than the value of a value raster. 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. The input value layer serves as reference layer for the sample layers. Any NoData cells in the value raster or the data layer stack will result in a NoData cell in the output raster if the ignore NoData parameter is not checked. The output NoData value can be set manually. The output rasters extent and resolution is defined by the input raster layer and is always of int32 type.
qgis_lessthanfrequency(
INPUT_VALUE_RASTER = qgisprocess:::qgis_default_value(),
INPUT_VALUE_RASTER_BAND = qgisprocess:::qgis_default_value(),
INPUT_RASTERS = qgisprocess:::qgis_default_value(),
IGNORE_NODATA = qgisprocess:::qgis_default_value(),
OUTPUT_NODATA_VALUE = qgisprocess:::qgis_default_value(),
CREATE_OPTIONS = qgisprocess:::qgis_default_value(),
OUTPUT = qgisprocess:::qgis_default_value(),
...,
.complete_output = .complete_output_option(),
.quiet = .quiet_option(),
.messages = .message_option()
)raster - Input value raster. Path to a raster layer.
band - Value raster band. Integer value representing an existing raster band number.
multilayer - Input raster layers. .
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.
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.
string - Creation options. 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.
rasterDestination - Output layer. Path for new raster layer.
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.
CRS_AUTHID - outputString - CRS authority identifier
EXTENT - outputString - Extent
FOUND_LOCATIONS_COUNT - outputNumber - Count of cells with equal value occurrences
HEIGHT_IN_PIXELS - outputNumber - Height in pixels
MEAN_FREQUENCY_PER_LOCATION - outputNumber - Mean frequency at valid cell locations
OCCURRENCE_COUNT - outputNumber - Count of value occurrences
OUTPUT - outputRaster - Output layer
TOTAL_PIXEL_COUNT - outputNumber - Total pixel count
WIDTH_IN_PIXELS - outputNumber - Width in pixels