Skip to Content
Report an accessibility problem

Digital Elevation Model (AZ 7.5 - Minute)


  • United States Geological Survey


7.5 Minute Digital Elevation Model for the state of Arizona. Digital Elevation Model (DEM) is the terminology adopted by the USGS to describe terrain elevation data sets in a digital raster form. The standard DEM consists of a regular array of elevations cast on a designated coordinate projection system. The DEM data are stored as a series of profiles in which the spacing of the elevations along and between each profile is in regular whole number intervals. The normal orientation of data is by columns and rows. Each column contains a series of elevations ordered from south to north with the order of the columns from west to east. The DEM is formatted as one ASCII header record (A-record), followed by a series of profile records (B-records) each of which include a short B-record header followed by a series of ASCII integer elevations per each profile. The last physical record of the DEM is an accuracy record (C-record). The DEM for 7.5-minute units correspond to the USGS 1:24000 scale topographic quadrangle map series for all of the United States and its territories. Each 7.5 minute DEM is based on 30- by 30-meter data spacing with Universal Transverse Mercator(UTM) projection. Each 7.5- by 7.5-minute block provides the same coverage as the standard USGS 7.5-minute map series.


Geographic Coverage:

Geographic Description: Arizona
Bounding Coordinates:
Longitude:-115.02644 to -108.913717
Latitude:37.039063 to 31.277057


Information Manager, Arizona State University, 
Global Institute of Sustainability,POB 875402,TEMPE

Data Files (1) :

Raster: AZ_DEM

Horizontal Coordinate System:WGS_1984_UTM_Zone_12N

Column Description Type Units
ObjectID Internal feature number.
Cell Value Elevation Value
Integer meter
Count Count
Integer number

Download EML Metadata for this data package