R/qgis_createconstantrasterlayer.R

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

##' QGIS Algorithm provided by QGIS (native c++) Create constant raster layer (native:createconstantrasterlayer). Generates raster layer for given extent and cell size filled with the specified value. Additionally an output data type can be specified. The algorithm will abort if a value has been entered that cannot be represented by the selected output raster data type.
##'
##' @title QGIS algorithm - Create constant raster layer
##'
##' @param EXTENT `extent` - Desired extent. A comma delimited string of x min, x max, y min, y max. E.g. '4,10,101,105'. Path to a layer. The extent of the layer is used..
##' @param TARGET_CRS `crs` - Target CRS. CRS as an auth ID (e.g. 'EPSG:3111'). CRS as a PROJ4 string (e.g. 'PROJ4:…'). CRS as a WKT string (e.g. 'WKT:…'). Path to a layer. The CRS of the layer is used..
##' @param PIXEL_SIZE `number` - Pixel size. 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.
##' @param NUMBER `number` - Constant 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.
##' @param OUTPUT_TYPE `enum`  of `("Byte", "Integer16", "Unsigned Integer16", "Integer32", "Unsigned Integer32", "Float32", "Float64")` - Output raster data type. Number of selected option, e.g. '1'. Comma separated list of options, e.g. '1,3'.
##' @param OUTPUT `rasterDestination` - Constant. Path for new raster layer.
##' @param ... further parameters passed to `qgisprocess::qgis_run_algorithm()`
##' @param .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`.
##' @param .quiet logical specifying if parameter `.quiet` for `qgisprocess::qgis_run_algorithm()` Default value is `TRUE`.
##' @param .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 - Constant
##'
##'
##' @export
##' @md
##' @importFrom qgisprocess qgis_run_algorithm

qgis_createconstantrasterlayer <- function(EXTENT = qgisprocess:::qgis_default_value(), TARGET_CRS = qgisprocess:::qgis_default_value(), PIXEL_SIZE = qgisprocess:::qgis_default_value(), NUMBER = qgisprocess:::qgis_default_value(), OUTPUT_TYPE = qgisprocess:::qgis_default_value(), OUTPUT = qgisprocess:::qgis_default_value(),..., .complete_output = .complete_output_option(), .quiet = .quiet_option(), .messages = .message_option()) {

  check_algorithm_necessities("native:createconstantrasterlayer")

  if (.messages){
    output <- qgisprocess::qgis_run_algorithm("native:createconstantrasterlayer", `EXTENT` = EXTENT, `TARGET_CRS` = TARGET_CRS, `PIXEL_SIZE` = PIXEL_SIZE, `NUMBER` = NUMBER, `OUTPUT_TYPE` = OUTPUT_TYPE, `OUTPUT` = OUTPUT,..., .quiet = .quiet)
  } else {
    suppressMessages(
      output <- qgisprocess::qgis_run_algorithm("native:createconstantrasterlayer", `EXTENT` = EXTENT, `TARGET_CRS` = TARGET_CRS, `PIXEL_SIZE` = PIXEL_SIZE, `NUMBER` = NUMBER, `OUTPUT_TYPE` = OUTPUT_TYPE, `OUTPUT` = OUTPUT,..., .quiet = .quiet)
      )
  }

  if (.complete_output) {
    return(output)
  }
  else{
    qgisprocess::qgis_extract_output(output, "OUTPUT")
  }
}