Source map:

Select the raster map that contains the source pixels. Open the drop-down list box and select a map, or directly drag a map from the Catalog into this box. In the Distance calculation dialog box, a source map can be any raster map with a class or ID domain. On the command line, you can also use raster maps with a value domain.

Weight map:

Select this check box if you do not have equal accessibility in the map, subsequently select the raster map that contains weigth values. Clear this check box if no weight values are to be used (equal accessibility).

Output map:

Type a name for the output raster map that will contain the calculated distances (in meters) towards the source pixels.

Domain:

Accept the default system domain Distance, or select or create your own output value domain.

Value range:

Accept the default value range, or specify your own range of possible values in the output map.

Precision:

Accept the default precision of output values, or specify your own precision.

Description:

Optionally, type a description for the output map. The description will appear in the status bar of the Main window when moving the mouse pointer over the map in a Catalog, and in the title bar of a map window when the output map is displayed. If no description is supplied, the output map will use its own definition as description.

Thiessen map:

Select this check box if you want to calculate a Thiessen map. Subsequently, type a name for the output Thiessen map.