The Clippingoperation is used to create a
subset of the image.
It is possible to do this operation in two ways:
Extent:
The user defines the envelope (inside the original extent) to crop the
raster.
Lower Left X
Lower Left Y
Upper Right X
Upper Right Y
Dimension: The Userdefines thestartingrow andcolumnandalsosets the heightand width
to crop the raster.
Initial Row
Initial Column
Height
Width
Layer: The user uses geometries from
a vectorial layer to crop the raster.
Layer: Combo with all available
vectorial layers.
Crop Type:
Aggregate all geometries: Use all
geometries from layer to crop the raster, generating only one raster.
Group by Attribute: Uses a specific
attribute from layer to group the geometries to crop the raster,
generating one raster for each group.
Use selected geometries: Uses only
the selected geometries to crop the raster.
It is
accessible through:
Raster
Processing > Clipping...(list
of all
raster layers will be available)
This
wizard consists of the
following steps:
Wizard Page 1 - Selection
of the layer to apply the clipping operation (Layer Search)
On the List
of Layers select the raster layer to clipping.
Optionally use Filter By Name
field
giving part of the layer name to help find the layer in the list.
Press Next
to go to next step or Cancel to close the
dialog.
Wizard Page 2 - Clipping parameters
Select the Type of clipping to
be used (Extent, Dimension or Layer) and set the their specific
parameters.
The acquisition of the
extent is possible through the interface Raster
Navigator. This interface offers several tools (such
as zoom, color composition) to helpin the selectionof the desiredarea.
Use tool to create a region
of interest over the image to crop the raster.
Press Next to apply the
contrast or Back to go to the previous wizard page.
Wizard Page 3 - Output
information
Raster Info
- First press and inform the folder where the resulting
file will be saved.
Name - inform
the raster name.
Extra
Parameters - if there are some, see the details on how to inform
then here.
Press Finish
to save the resulting contrasted raster or Back
to go to the previous wizard page.
Hint: The clipping image will be added as a new layer at the TerraView
project.