Import from Virtual Raster (VRT)

Author: V. Wichmann (c) 2019
Menu: File | Grid | Import

Description

The tool allows one to clip / extract a raster subset from a virtual raster dataset (VRT). Such a VRT is actually an XML based description of a mosaic of raster datasets and can be created with the "Create Virtual Raster (VRT)" tool.

References

GDAL/OGR contributors (2019): GDAL/OGR Geospatial Data Abstraction software Library. A translator library for raster and vector geospatial data formats. Open Source Geospatial Foundation. Link.

Parameters

	Name	Type	Identifier	Description	Constraints
Input	Shapes Extent	shapes, input	`SHAPES`	The shapefile defining the clipping extent.	-
Output	Grids	grid list, output	`GRIDS`	-	-
Options	VRT Filename	file path	`VRT_NAME`	The full path and name of the .vrt file.	-
	Extent	choice	`EXTENT`	Choose how to define the clipping extent.	Available Choices: [0] user defined [1] grid system [2] shapes extent Default: 0
	Grid System	grid system	`GRIDSYSTEM`	The target grid system.	-
	Left	floating point number	`XMIN`	The minimum x-coordinate of the clipping extent.	Default: 0.000000
	Right	floating point number	`XMAX`	The maximum x-coordinate of the clipping extent.	Default: 0.000000
	Bottom	floating point number	`YMIN`	The minimum y-coordinate of the clipping extent.	Default: 0.000000
	Top	floating point number	`YMAX`	The maximum y-coordinate of the clipping extent.	Default: 0.000000
	Buffer	floating point number	`BUFFER`	The optional buffer added to the clipping extent [map units].	Minimum: 0.000000 Default: 0.000000
	Multiple Bands Output	choice	`MULTIPLE`	Choose how to handle output datasets with multiple bands.	Available Choices: [0] single grids [1] grid collection [2] automatic Default: 2
	Transformation	boolean	`TRANSFORM`	Align grid to coordinate system.	Default: 1
	Resampling	choice	`RESAMPLING`	Resampling type to be used, if grid needs to be aligned to coordinate system.	Available Choices: [0] Nearest Neighbour [1] Bilinear Interpolation [2] Bicubic Spline Interpolation [3] B-Spline Interpolation Default: 0

Command Line


Usage: saga_cmd io_gdal 13 [-VRT_NAME ] [-GRIDS ] [-EXTENT ] [-GRIDSYSTEM_D ] [-GRIDSYSTEM_X ] [-GRIDSYSTEM_Y ] [-GRIDSYSTEM_NX ] [-GRIDSYSTEM_NY ] [-GRIDSYSTEM_FILE ] [-SHAPES ] [-XMIN ] [-XMAX ] [-YMIN ] [-YMAX ] [-BUFFER ] [-MULTIPLE ] [-TRANSFORM ] [-RESAMPLING ]
  -VRT_NAME:       	VRT Filename
	file path
  -GRIDS:          	Grids
	grid list, output
  -EXTENT:         	Extent
	choice
	Available Choices:
	[0] user defined
	[1] grid system
	[2] shapes extent
	Default: 0
  -GRIDSYSTEM_D:	Cell Size
  -GRIDSYSTEM_X:	Lower Left Center Cell X-Coordinate
  -GRIDSYSTEM_Y:	Lower Left Center Cell Y-Coordinate
  -GRIDSYSTEM_NX:  	Number of Columns
  -GRIDSYSTEM_NY:  	Number of Rows
  -GRIDSYSTEM_FILE:	Grid File
  -SHAPES:         	Shapes Extent
	shapes, input
  -XMIN:        	Left
	floating point number
	Default: 0.000000
  -XMAX:        	Right
	floating point number
	Default: 0.000000
  -YMIN:        	Bottom
	floating point number
	Default: 0.000000
  -YMAX:        	Top
	floating point number
	Default: 0.000000
  -BUFFER:      	Buffer
	floating point number
	Minimum: 0.000000
	Default: 0.000000
  -MULTIPLE:       	Multiple Bands Output
	choice
	Available Choices:
	[0] single grids
	[1] grid collection
	[2] automatic
	Default: 2
  -TRANSFORM:      	Transformation
	boolean
	Default: 1
  -RESAMPLING:     	Resampling
	choice
	Available Choices:
	[0] Nearest Neighbour
	[1] Bilinear Interpolation
	[2] Bicubic Spline Interpolation
	[3] B-Spline Interpolation
	Default: 0