Topobathymetric Elevation Model Development using a New Methodology: Coastal National Elevation Database

Coastal Elevation from Sparse Level Curves

Elevation Uncertainty in Coastal Inundation Hazard Assessments

Coastal inundation has been identified as an important natural hazard that affects densely populated and built-up areas (Subcommittee on Disaster Reduction, 2008). Inundation, or coastal flooding, can result from various physical processes, including storm surges, tsunamis, intense precipitation events, and extreme high tides. Such events cause quickly rising water levels. When rapidly rising w...

Elevation Model Generation by Using Radarsat Images

Like all other Synthetic Aperture Radars (SAR), Radarsat is very sensitive to the terrain shape. Fine details of the ground clearly appear in its image products which enable us to map regions generally not visible by optical systems. Moreover, in the case of tropical and equatorial regions, precise maps are often not available, since the elevation data is totally unknown. The objective of our p...

Geomorphometric Analysis of Maroon River by Digital Elevation Model

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...

Triangulated Digital Elevation Model: Definition of a New Representation

In this paper we discuss about the need of a new DEM representation for simulation in GIS. This leads us to analyse through quality criteria the current DEM structures. Then we propose a new DEM representation adapted for spatial and graph terrain analysis. An algorithm is presented and the qualities of this structure are analysed. Finally, this structure is used in a thematic application for a...