This article describes the method of using irregular triangulated network to establish DEM (digital elevation model).Based on the DEM model, the article established and gave the relevant models and methods on the water areas and storage capacity in real time simulation by computer for forecasting and controlling of storage capacity and other related terms.

Digital Elevation Model (DEM), while providing a “bare earth” look, is heavily used in many applications including construction modeling, visualization, and GIS. Their registration techniques have not been explored much. Methods like Coarse-to-fine or pyramid making are common in DEM-to-image or DEM-to-map registration. Selfconsistency measure is used to detect any change in terrain elevation a...

The aim of this study is to investigate the accuracy and reliability of radargrammetric DEMs generated from RADARSAT-2 stereo pairs. Two ultrafine mode images U7 and U26 were acquired over an area in Istanbul from descending orbit, HH polarization, in SGF format. U7 and U26 were taken on August 2, 2009 and July 30, 2009 with view angles of 34.0 35.3 and 48.5 49.5 at the near–far edges, respecti...

Terrain aided positioning (TAP) is a kind of positioning method which acquires position information from the terrain elevation datum underneath the vehicle. This method has the characteristics of autonomy, allweather, anti-interference, strong stealthiness and high accuracy. It is widely used in the navigation system for various aircrafts, cruise missiles and underwater vehicles. The fundamenta...

Topographic parameters in glacier inventories are a requirement to analyze glacier characteristics and are of vital importance for several subsequent applications. To obtain the topographic information a digital elevation model (DEM) is required; however, in many regions of the world no national or local DEM of sufficient quality is available. With the SRTM DEM and the ASTER Global Digital Elev...

Calculations based on US Geological Survey (USGS) digital elevation models (DEMs) inherit any errors associated with that particular representation of topography. We investigated the potential impact of error in a USGS 30 m DEM on terrain analysis over 27 km. The difference in elevation between 2652 differential Global Positioning Systems measurements and USGS 30-m DEM derived elevations provid...

* Corresponding author. E-mail address: [email protected] (B. 1537-5110/$ – see front matter a 2008 IAgrE doi:10.1016/j.biosystemseng.2008.09.010 Digital Elevation Model (DEM) fusion was investigated for improving the overall accuracy of DEMs. The approach was applied to two public domain products: Shuttle Radar Topographic Mission (SRTM) DEM and Advanced Spaceborne Thermal Emission and Refl...

Loci of extreme curvature of the topographic surface may be defined by the derivation function (T) depending on the first-, second-, and third-order partial derivatives of elevation. The loci may partially describe ridge and thalweg lines. The firstand second-order partial derivatives are commonly calculated from a digital elevation model (DEM) by fitting the second-order polynomial to a 363 wi...

[1] Here we use Ice, Cloud and land Elevation Satellite (ICESat)-derived elevations and surface characteristics to investigate the Malaspina Glacier of southern Alaska. Although there is significant elevation variability between ICESat tracks on this glacier, we were able to discern general patterns in surface elevation change by using a regional digital elevation model (DEM) as a reference sur...