Phoenix

DEM Data Source: USGS NED
Resolution: 10m
Original Elevations: 273 through 1357m

Strait of Gibraltar

DEM Data Source: ASTER, SRTM30+, SRTM3 v4.1
Resolution: 30m, 900m, 30m
Original Elevations: 0 through 834m

Cajon Pass

DEM Data Source: ASTER, SRTM30+, SRTM3 v4.1, USGS NED
Resolution: 30m, 900m, 30m, 10m
Original Elevations: 154 through 3069m

Mount Everest

DEM Data Source: ASTER, SRTM30+, SRTM3 v4.1
Resolution: 30m, 900m, 30m
Original Elevations: 2484 through 8975m

Los Angeles

DEM Data Source: ASTER, SRTM30+
Resolution: 30m. 900m
Original Elevations: 0 through 1752m