DEM Resolution Reference

The table below shows the relationship between the commonly used (in broadcasting industry) DEM (Digital Elevation Model) resolutions and the distances on the surface of the Earth that they represent.

APSalin DEM Resolution Reference Table
DEM Resolution Distance (Metric) Distance (US)
0.1 arc second ~3 m ~10.94 ft
0.3 arc second ~10 m ~32.81 ft
1 arc second ~33 m ~109.36 ft
2 arc seconds ~67 m ~218.72 ft
3 arc seconds ~100 m ~328.08 ft
30 arc seconds ~1,000 m ~3,280.84 ft
60 arc seconds ~2,000 m ~6,561.68 ft
1 minute ~2 km ~1.24 mi
7.5 minutes ~15 km ~9.32 mi
30 minutes ~60 km ~37.28 mi
1 degree ~120 km ~74.56 mi
2 degrees ~240 km ~149.13 mi
3 degrees ~360 km ~223.69 mi

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