R/gdal_buildvirtualraster.R
gdal_buildvirtualraster.Rd
QGIS Algorithm provided by GDAL Build virtual raster (gdal:buildvirtualraster). —————- Arguments —————- INPUT: Input layers Argument type: multilayer RESOLUTION: Resolution Default value: 0 Argument type: enum Available values: - 0: Average - 1: Highest - 2: Lowest Acceptable values: - Number of selected option, e.g. '1' - Comma separated list of options, e.g. '1,3' SEPARATE: Place each input file into a separate band Default value: true 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 PROJ_DIFFERENCE: Allow projection difference 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 ADD_ALPHA: Add alpha mask band to VRT when source raster has none 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 ASSIGN_CRS: Override projection for the output file (optional) Argument type: crs Acceptable values: - 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. RESAMPLING: Resampling algorithm Default value: 0 Argument type: enum Available values: - 0: Nearest Neighbour - 1: Bilinear (2x2 Kernel) - 2: Cubic (4x4 Kernel) - 3: Cubic B-Spline (4x4 Kernel) - 4: Lanczos (6x6 Kernel) - 5: Average - 6: Mode Acceptable values: - Number of selected option, e.g. '1' - Comma separated list of options, e.g. '1,3' SRC_NODATA: Nodata value(s) for input bands (space separated) (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 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 OUTPUT: Virtual Argument type: rasterDestination Acceptable values: - Path for new raster layer
gdal_buildvirtualraster(
INPUT = qgisprocess:::qgis_default_value(),
RESOLUTION = qgisprocess:::qgis_default_value(),
SEPARATE = qgisprocess:::qgis_default_value(),
PROJ_DIFFERENCE = qgisprocess:::qgis_default_value(),
ADD_ALPHA = qgisprocess:::qgis_default_value(),
ASSIGN_CRS = qgisprocess:::qgis_default_value(),
RESAMPLING = qgisprocess:::qgis_default_value(),
SRC_NODATA = qgisprocess:::qgis_default_value(),
EXTRA = qgisprocess:::qgis_default_value(),
OUTPUT = qgisprocess:::qgis_default_value(),
...,
.complete_output = .complete_output_option(),
.quiet = .quiet_option(),
.messages = .message_option()
)
multilayer
- Input layers. .
enum
of ("Average", "Highest", "Lowest")
- Resolution. Number of selected option, e.g. '1'. Comma separated list of options, e.g. '1,3'.
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.
boolean
- Allow projection difference. 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.
boolean
- Add alpha mask band to VRT when source raster has none. 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.
crs
- Override projection for the output file. 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..
enum
of ("Nearest Neighbour", "Bilinear (2x2 Kernel)", "Cubic (4x4 Kernel)", "Cubic B-Spline (4x4 Kernel)", "Lanczos (6x6 Kernel)", "Average", "Mode")
- Resampling algorithm. Number of selected option, e.g. '1'. Comma separated list of options, e.g. '1,3'.
string
- Nodata value(s) for input bands (space separated). 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.
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.
rasterDestination
- Virtual. Path for new raster layer.
further parameters passed to qgisprocess::qgis_run_algorithm()
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
.
logical specifying if parameter .quiet
for qgisprocess::qgis_run_algorithm()
Default value is TRUE
.
logical specifying if messages from qgisprocess::qgis_run_algorithm()
should be printed (TRUE
) or not (FALSE
). Default value is FALSE
.