| Product Subset | |
This dialog appears from various import and export file chooser dialogs and always if a new propduct has to be created from a base product, such as in the Band Maths dialog.
The dialog is divided into four tabs, each providing specific subset options.
If you are not interested in the whole image, you may specify an area
of the product to be loaded. You can select the area by dragging the blue
surrounding rectangle in the preview (see figure above). You can also specify
the area manually either by pixel coordinates or by geo coordinates. If you drag
the rectangle, the field values change simultaneously.
You can also specify a sub-sampling, by setting the values of
Scene step X and Scene step Y.
NOTE: Pins outside of the spatial subset area will not be preserved in the
resulting product, because they are bound to the pixel coordinates of the product.
GCPs are preserved, because they are bound to a geo-location.
This tab is used to select the bands you want to have in your product subset.
As with bands, this tab is used to select the tie-point grids you want to have in your product subset.
The tie-point grids named latitude and longitue can not be deselected
because they provide essential geo-coding information.
The tab lets you select/deselect meta-data records and tables. By default all meta-data tables are deselected, because they can be very huge for ENVISAT products and may reduce VISAT's performance.