A new digital elevation model (DEM) is presented for accurate surface representation in photogrammetric processing of stereo ground-based imagery. This model is named the continuative variable resolution DEM (cvrDEM). In contrast to traditional grid-based DEMs that have only one fixed resolution, this new model can provide resolutions that vary depending on the range represented in the groundba...

Digital Elevation Models (DEMs) are used to estimate different morphologies, analysis of river profile, delineating drainage basin and drainage pattern associated with lithological and structural changes. The study area is Maroon River located in Khuzestan Province, Iran. In this study geomorphometric analysis based on DEM carried out to understand Maroon river uplift rate and tectonic- erosion...

Global mapping of urban environments is a challenging task. Earth observation is probably the only source possibly providing a consistent and area-wide data set. With the German TanDEM-X mission two global coverages of high resolution radar data will be available for 2011 and 2012. While the main task of the mission is the derivation of a global digital elevation model, the collected data will ...

the aim of the study is the classification of landform based on elevation, slope, relief and curvature inputs (old method) and topographic position index (tpi) (new method) in the south of bojnoord. the input data for the two methods is a digital elevation model (dem). the results of topographic position index (tpi) model showed that most area of landform were covered by class 5 (plains small) ...

S ubstantial intellectual and financial resources have been invested in the quest to reduce outcomes in patients with ST elevation myocardial infarction (STEMI) through improved pharmacological and mechanical reperfusion therapies. By contrast, little emphasis has been placed on enhancing the medical systems whereby these treatments are delivered, especially as it relates to pre-hospital reperf...

In processing raster digital elevation models (DEMs) it is often necessary to assign drainage directions over flats—that is, over regions with no local elevation gradient. This paper presents an approach to drainage direction assignment which is not restricted by a flat’s shape, number of outlets, or surrounding topography. Flow is modeled by superimposing a gradient away from higher terrain wi...

An der TU Dresden wird seit September 2000 ein Anonymisierungsdienst betrieben, der ein weitgehend unbeobachtbares Surfen im Internet erlaubt. Mit bis zu 4000 Nutzern täglich erfreut sich dieser Dienst wachsender Beliebtheit und zählt inzwischen zu den fünf meistgenutzten Anonymisierungsdiensten dieser Art weltweit. Die für die Nutzung des Dienstes benötigte Client-Software JAP ist entstanden i...

Traditional glaciological mass balance measurements of mountain glaciers are a demanding and cost intensive task. In this study, we combine data from the Ice Cloud and Elevation Satellite (ICESat) acquired between 2003 and 2009 with air and space borne Digital Elevation Models (DEMs) in order to derive surface elevation changes of the Grosser Aletschgletscher in the Swiss Alps. Three different ...