gdal_rgbtopct: QGIS algorithm - RGB to PCT

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

QGIS algorithm - RGB to PCT

Description

QGIS Algorithm provided by GDAL RGB to PCT (gdal:rgbtopct). —————- Arguments —————- INPUT: Input layer Argument type: raster Acceptable values: - Path to a raster layer NCOLORS: Number of colors Default value: 2 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 OUTPUT: RGB to PCT Argument type: rasterDestination Acceptable values: - Path for new raster layer

Usage

gdal_rgbtopct(
  INPUT = qgisprocess:::qgis_default_value(),
  NCOLORS = qgisprocess:::qgis_default_value(),
  OUTPUT = 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.
NCOLORS	number - Number of colors. 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 - RGB to PCT. 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

• OUTPUT - outputRaster - RGB to PCT

JanCaha/r_package_qgis documentation built on April 12, 2025, 10:51 a.m.