THIS DATA SET HAS BEEN PROJECTED TO THE FOLLOWING PARAMETERS Projection: UTM Zone: 12 Units: meters Datum: NAD83 (previously NAD27) Spheroid: GRS80 (previously Clarke 1866) THIS DOCUMENT WAS CREATED AT ART, UNIVERSITY OF ARIZONA, September 21, 2001 NAME OF DATASET: HELVETIA DATA TYPE: raster DESCRIPTION OF CONTENT: This is the USGS 30 meter DEM for the Helvetia 7.5 minute quadrangle. Cell Size = 30.000 Data Type: Floating Point Number of Rows = 463 Number of Columns = 395 FORMAT: Arc/Info GRID DATA SIZE: Approximate Megabytes: .739 HISTORY: This data was obtained from the ALRIS program in the USGS DEM data format. It was read into the ARC/INFO GRID format at the Advanced Resource Technology Group at The University of Arizona. These data have been projected into the NAD83 datum. MAINTENANCE: NONE