DEM of the Veneto plain by ERS2-ENVISAT cross-inteferometry
G. Gasparetto-Stori
Consorzio di Bonifica Adige-Euganeo, Conselve, Italy
T. Strozzi, U. Wegmüller
Gamma Remote Sensing, Gümligen, Switzerland
P. Teatini
Dept. of Civil, Environmental and Architectural Engineering,
University of Padova, Padova, Italy
L. Tosi, A. Vianello
Institute of Marine Sciences, CNR, Venezia,
Italy
ABSTRACT
Digital Elevation Models (DEMs) of flat lowlying
coastlands are becoming even more important
for environmental risk analyses, for example
the development of effective plans for flooding
protection.
The need of information at high spatial resolution
over very large areas, of the order of 100×100 km2,
practically precludes the use of traditional methods
(e.g., leveling and DGPS) due to their intrinsic
limitation in covering wide zones and reduces
the possibility of using Lidar because of its high
cost. Starting from the last decade, space-borne
radar sensors have been used extensively for this
purpose. The most known is the SRTM (Shuttle
Radar Topographic Mission) DEM which covers
most of the land area between ±60° latitude (Rabus
et al., 2003). This DEM was generated using single-pass
interferometry and is widely available at
3-arc-seconds. In this work, we present the results
obtained for the Veneto plain, Italy, using the space-borne
SAR (Synthetic Aperture Radar) cross-interferometry
(Wegmüller et al., 2009).
