A thematic raster layer must be loaded into ArcMap in order to use this
tool. Select the layer you wish to process from the drop-down box. Define an output
line shapefile by pressing the folder button.
This tool will process the first band from multi-band rasters. If your raster has more than
one band and you wish to process a band that is not the first band, load only that band into
the map. (When you press the Add Data button, navigate to the multi-band raster, and double-click
that raster (this will show you each band as a separate layer as though the raster was a folder
you had just opened). Select only the band you wish to process and add that to the map window. Then
use this tool as described above.