gdal_merge: QGIS algorithm - Merge

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

QGIS algorithm - Merge

Description

QGIS Algorithm provided by GDAL Merge (gdal:merge). —————- Arguments —————- INPUT: Input layers Argument type: multilayer PCT: Grab pseudocolor table from first layer Default value: false Argument type: boolean Acceptable 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 SEPARATE: Place each input file into a separate band Default value: false Argument type: boolean Acceptable 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 NODATA_INPUT: Input pixel value to treat as NoData (optional) 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 NODATA_OUTPUT: Assign specified NoData value to output (optional) 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 OPTIONS: Additional creation options (optional) Default value: Argument type: string Acceptable values: - 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 EXTRA: Additional command-line parameters (optional) Argument type: string Acceptable values: - 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 DATA_TYPE: Output data type Default value: 5 Argument type: enum Available values: - 0: Byte - 1: Int16 - 2: UInt16 - 3: UInt32 - 4: Int32 - 5: Float32 - 6: Float64 - 7: CInt16 - 8: CInt32 - 9: CFloat32 - 10: CFloat64 - 11: Int8 Acceptable values: - Number of selected option, e.g. '1' - Comma separated list of options, e.g. '1,3' OUTPUT: Merged Argument type: rasterDestination Acceptable values: - Path for new raster layer

Usage

gdal_merge(
  INPUT = qgisprocess:::qgis_default_value(),
  PCT = qgisprocess:::qgis_default_value(),
  SEPARATE = qgisprocess:::qgis_default_value(),
  NODATA_INPUT = qgisprocess:::qgis_default_value(),
  NODATA_OUTPUT = qgisprocess:::qgis_default_value(),
  OPTIONS = qgisprocess:::qgis_default_value(),
  EXTRA = qgisprocess:::qgis_default_value(),
  DATA_TYPE = qgisprocess:::qgis_default_value(),
  OUTPUT = qgisprocess:::qgis_default_value(),
  ...,
  .complete_output = .complete_output_option(),
  .quiet = .quiet_option(),
  .messages = .message_option()
)

Arguments

INPUT	multilayer - Input layers. .
PCT	boolean - Grab pseudocolor table from first layer. 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.
SEPARATE	boolean - Place each input file into a separate band. 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.
NODATA_INPUT	number - Input pixel value to treat as NoData. 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.
NODATA_OUTPUT	number - Assign specified NoData value to output. 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.
OPTIONS	string - Additional 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.
EXTRA	string - Additional command-line parameters. 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.
DATA_TYPE	enum of ⁠("Byte", "Int16", "UInt16", "UInt32", "Int32", "Float32", "Float64", "CInt16", "CInt32", "CFloat32", "CFloat64", "Int8")⁠ - Output data type. Number of selected option, e.g. '1'. Comma separated list of options, e.g. '1,3'.
OUTPUT	rasterDestination - Merged. 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 - Merged

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