This program creates a footprint polygon from a cube using latitude and longitude space, and then outputs the polygon to a Geography Markup Language (GML) file. A standard output file with an "xsd" extension is also created as a companion to the GML formatted file.

Note:

• The input cube must be in either camera space (Level1) or map projected space (Level2).
• This program does not add a projection file, or merge footprints from separate files.

If you specify a string or a filename in the LABEL parameter, it is stored in the GML header within the ID tag, which will then contain the values that you specified.

The output file size is influenced by the increment value assigned to the LINC and SINC parameters. The higher the increment value (greater than 1)

• the sparser the number of points used to draw the polygon,
• the smaller the file size, and
• the faster the job completes.

The parameter LONGITUDEDOMAIN is used to change the longitude domain (from 180° to 360° or vice-versa) as needed during the conversion to GML format. If you do not assign a longitude domain, isis2gml will default to the value in the ISIS cube label.

Example: If your ISIS cube is in the 180° domain, and other non-ISIS files (ones you plan to load in GIS) are in the 360° domain, the ISIS cube must be converted to 360° when you create your GML file. This will make all your files compatible in the 360° domain if you want to load them in a GIS application.