Comparison of ERS-2/Envisat and SRTM DEM

Comparison of Digital Elevation Models (DEMs) for a 50 km x 35 km area of the Po River Delta, Italy.

The DEM shown in the left image was derived from highly accurate interferometric data gathered during tandem observations by ESA's ERS-2 and Envisat (7 Nov 2007). The image to the right shows the interpolated Shuttle Radar Topography Mission (SRTM) DEM heights over the same area using the identical very fine color scale.

In the SRTM DEM (showing 3-arc-second resolution equivalent to approx. 90m resolution), areas with forest and buildings are shown in pink indicating heights equal to or larger than + 1m above sea level (masl).

Courtesy Gamme Remote Sensing AG