| Product Subset | |
This dialog appears from various import and export file selection dialogs and always if a new product has to be created from a base product, such as in the map projection or band arithmetic dialogs.
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 either by dragging the blue
surrounding rectangle in the preview (see figure above) or by editing the appropriate
fields. 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.
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 longitude 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 DAT's performance.