##' QGIS Algorithm provided by SAGA Next Gen Gaussian filter (sagang:gaussianfilter). ---------------- Arguments ---------------- INPUT: Grid Argument type: raster Acceptable values: - Path to a raster layer RESULT: Filtered Grid Argument type: rasterDestination Acceptable values: - Path for new raster layer SIGMA: Standard Deviation Default value: 50 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 KERNEL_TYPE: Kernel Type Default value: 1 Argument type: enum Available values: - 0: (0) Square - 1: (1) Circle Acceptable values: - Number of selected option, e.g. '1' - Comma separated list of options, e.g. '1,3' KERNEL_RADIUS: Radius 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
##'
##' @title QGIS algorithm - Gaussian filter
##'
##' @param INPUT `raster` - Grid. Path to a raster layer.
##' @param RESULT `rasterDestination` - Filtered Grid. Path for new raster layer.
##' @param SIGMA `number` - Standard Deviation. 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 KERNEL_TYPE `enum` of `("(0) Square", "(1) Circle")` - Kernel Type. Number of selected option, e.g. '1'. Comma separated list of options, e.g. '1,3'.
##' @param KERNEL_RADIUS `number` - Radius. 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 ... 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
##' * RESULT - outputRaster - Filtered Grid
##'
##'
##' @export
##' @md
##' @importFrom qgisprocess qgis_run_algorithm
sagang_gaussianfilter <- function(INPUT = qgisprocess:::qgis_default_value(), RESULT = qgisprocess:::qgis_default_value(), SIGMA = qgisprocess:::qgis_default_value(), KERNEL_TYPE = qgisprocess:::qgis_default_value(), KERNEL_RADIUS = qgisprocess:::qgis_default_value(),..., .complete_output = .complete_output_option(), .quiet = .quiet_option(), .messages = .message_option()) {
check_algorithm_necessities("sagang:gaussianfilter")
if (.messages){
output <- qgisprocess::qgis_run_algorithm("sagang:gaussianfilter", `INPUT` = INPUT, `RESULT` = RESULT, `SIGMA` = SIGMA, `KERNEL_TYPE` = KERNEL_TYPE, `KERNEL_RADIUS` = KERNEL_RADIUS,..., .quiet = .quiet)
} else {
suppressMessages(
output <- qgisprocess::qgis_run_algorithm("sagang:gaussianfilter", `INPUT` = INPUT, `RESULT` = RESULT, `SIGMA` = SIGMA, `KERNEL_TYPE` = KERNEL_TYPE, `KERNEL_RADIUS` = KERNEL_RADIUS,..., .quiet = .quiet)
)
}
if (.complete_output) {
return(output)
}
else{
qgisprocess::qgis_extract_output(output, "RESULT")
}
}
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