Creation of digital terrain models using software applications

Generation of Digital Terrain Models using polarimetric SAR interferometry

.................................................................................................................................................. i Acknowledgments.................................................................................................................................. ii Table of contents.....................................................................................

Geological applications of digital terrain analysis

Terrain Analysis Using Digital Elevation Models in Hydrology

This paper describes methods that use digital elevation models (DEMs) in hydrology, implemented as an ArcGIS toolbar using Visual Basic and the ESRI object library. I describe generalized channel network delineation to objectively estimate drainage density and by using terrain curvature accommodate spatially variable drainage density. The multiple flow direction field determined from a DEM also...

Generating Digital Terrain Models Using Lroc Nac Images

The Lunar Reconnaissance Orbiter Camera (LROC) consists of one Wide Angle Camera (WAC) for synoptic multispectral imaging and two Narrow Angle Cameras (NAC) to provide high-resolution images (0.5 to 2.0 m pixel scale) of key targets. LROC was not designed as a stereo system, but can obtain stereo pairs through images acquired from two orbits (with at least one off-nadir slew). Off-nadir rolls i...

Automated Quality Control of Digital Terrain Models

The paper demonstrates modified cross-correlation methods to detect height errors of DTM points based on stereo-pairs of aerial images. The usual cross-correlation method is extended using dynamic dimensioning and different structures of the correlation matrix. Also a texture coefficient is introduced which makes the auto-correlation procedure more robust. All together seven different image mat...