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 [2] Cubic 1 [3] Cubic 2 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
                           	[2] Cubic 1
                           	[3] Cubic 2
                           	Default: 0