QGIS algorithm - Raster layer unique values report

Source: R/qgis_rasterlayeruniquevaluesreport.R

QGIS Algorithm provided by QGIS (native c++) Raster layer unique values report (native:rasterlayeruniquevaluesreport). This algorithm returns the count and area of each unique value in a given raster layer. The area calculation is done in the area unit of the layer's CRS.

qgis_rasterlayeruniquevaluesreport(
  INPUT = qgisprocess:::qgis_default_value(),
  BAND = qgisprocess:::qgis_default_value(),
  OUTPUT_HTML_FILE = qgisprocess:::qgis_default_value(),
  OUTPUT_TABLE = qgisprocess:::qgis_default_value(),
  ...,
  .complete_output = .complete_output_option(),
  .quiet = .quiet_option(),
  .messages = .message_option()
)

Arguments

INPUT

raster - Input layer. Path to a raster layer.

BAND

band - Band number. Integer value representing an existing raster band number.

OUTPUT_HTML_FILE

fileDestination - Unique values report. Path for new file.

OUTPUT_TABLE

sink - Unique values table. Path for new 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

  • CRS_AUTHID - outputString - CRS authority identifier

  • EXTENT - outputString - Extent

  • HEIGHT_IN_PIXELS - outputNumber - Height in pixels

  • NODATA_PIXEL_COUNT - outputNumber - NoData pixel count

  • OUTPUT_HTML_FILE - outputHtml - Unique values report

  • OUTPUT_TABLE - outputVector - Unique values table

  • TOTAL_PIXEL_COUNT - outputNumber - Total pixel count

  • WIDTH_IN_PIXELS - outputNumber - Width in pixels