gvSIG-Desktop 1.9 Alpha. Manual de usuario.

Band calculator allows you to perform mathematical operations between band values of the same image or from different images maintaining some spatial constraints (always on original values). The result of this operation is a one-band raster image.

To open the Calculator tool, you have to use the remote sensing toolbar by selecting “Raster process” from the left button and “Raster calculator” from the right button.

1. the elements tree: allows to add different elements to the operation just browsing and double click over the selected element.
2. expression frame: expression used for the operation
3. table of variables: will contain the relation between variables and bands
4. calculator keyboard: allow to insert numerical values as well as basic operators in the expression.