We study the accuracy of data on some local topographic attributes derived from digital elevation models (DEMs). First, we carry out a test for the precision of four methods for calculation of partial derivatives of elevations. We ® nd that the Evans method is the most precision algorithm of this kind. Second, we produce formulae for root mean square errors of four local topographic variables (...

This paper proposes the localization algorithm that estimates a ground position by comparing the recovered elevations estimated from aerial images with digital elevation model (DEM). The proposed algorithm consists of two stages: recovering the sampled elevations from multiple aerial images and matching them with DEM. While conventional algorithms estimate the elevation field, that is, recovere...

In this paper new and innovative techniques during the commissioning phase of TanDEM-X will be presented that are firstly demonstrated on a satellite platform. The focus is on the secondary goals of TanDEM-X that are assigned for the third year of the mission time life due to the tight schedule for the acquisition of the highly accurate global digital elevation model. Therefore, a variety of sc...

Considering large and complex areas like the Tibetan Plateau, an analysis of the spatial distribution of the solar radiative budget over time not only requires the use of satellite remote sensing data, but also of an algorithm that accounts for strong variations of topography. Therefore, this research aims at developing a method to produce time series of solar radiative fluxes at high temporal ...

We analysed the long-term variations in grain-size distribution in sediments from Gåsfjärden, a fjordlike inlet in the southwestern Baltic Sea, and explored potential drivers of the recorded changes in the sediment grain-size data. Over the last 5.4 thousand years (ky) in the study region, the relative sea level decreased 17 m, which was caused by isostatic land uplift. As a consequence, Gåsfjä...

TanDEM-X opens a new era in space borne radar remote sensing. The first bistatic SAR mission, is formed by adding a second, almost identical spacecraft, to TerraSAR-X and flying the two satellites in a closely controlled formation with typical distances between 250 and 500 m. Primary mission objective is the generation of a consistent global digital elevation model with an unprecedented accurac...

This article presents technical work done with DAICHI ALOS PRISM data in order to assess the feasibility and quality of Digital Elevation Model extracted from ALOS PRISM triplet of images. Thanks to its configuration, the PRISM instrument is capable of simultaneous stereoscopic acquisition of the observed landscape which should easier the automatic processing of such data for Digital Elevation ...

A technique for automated terrain corrected SAR geocoding is presented. Instead of operator selected control points the presented method uses cross-correlation with a SAR intensity image simulated from the Digital Elevation Model to refine the geocoding transformation.

Techniques and experience to creation of Digital Models in Bulgaria Plamen Maldjanski SUMMARY Most important examples of digital elevation models (DTM) and digital models (DM’s) of monuments of culture and architecture in Bulgaria are described. Examples about the informative technologies influence of the evolution of the photogrammetrical ones are showed. Finally it is shown that the evolution...