Executing: Viewshed HW_Elec.asc Monuments2 C:\Users\scott\Desktop\GIS_20\DATA\project\Viewshe_HW_E1 1 FLAT_EARTH #
Start Time: Thu Dec 09 08:35:41 2010
ERROR 010067: Error in executing grid expression. No valid Observation points present. Point 222 with coordinates 0.000, 35657162752.000 is NODATA.
Failed to execute (Viewshed)
End Time: Thu Dec 09 08:35:42 2010 (Elapsed Time: 1.00 seconds)
All the files should be projected.