abstract geosystems or geomorphic systems include terrain structure with processes interactions that work as alone or common and create a series of terrain unites. geosystem elements consist of lines, points, surfaces, and volumes. the ways of relationships between the elements form spatial structure identity. the elements prepare spaces for different land uses, when they are located in ratio t...

the objective of this study is evaluation of topographic wetness index (twi) using attraction model in northern of fars province. the first attraction model was used to enhance the spatial resolution of digital elevation model (dem). in this research to estimate of value of sub-pixels neighboring pixels, touching and quadrant neighboring models were used. after manufacturing output images for s...

Two different methods utilizing geographical information systems (GIS) and digital elevation models (DEMs) are described and evaluated for applying the Water Erosion Prediction Project (WEPP) model to assess water erosion and runoff in small watersheds. The first approach, called the Hillslope method, presents an automated method for the application of WEPP through the extraction of hillslopes ...

With the launch of the recent high-resolution Synthetic Aperture Radar (SAR) satellite missions, e.g., TerraSAR-X, RadarSAT-2, and CosmoSkymed, the technique of radargrammetry motivates interest again to potentially improve upon the level of detail and accuracy of Digital Elevation Models (DEM) from a global coverage perspective as an alternative to data derived from Interferometric SAR (IFSAR)...

For several years the technique of radargrammetry with high resolution Synthetic Aperture Radar (SAR) data has been used in scientific and commercial environment for Digital Elevation Modelling (DEM). Compared to repeat pass interferometry, radargrammetry is a robust DEM generation technique for almost all areas on the globe due to phase independent matching algorithms. Particularly in areas wi...

To generate an accurate digital elevation model (DEM), Interferometric Synthetic Aperture Radar (InSAR) requires precise orbit data and baseline information, which are not always available. An alternative approach is to apply quality ground control points (GCPs) into the InSAR processing. However, locating high quality GCPs can also be difficult task, due to the low spatial resolution and radio...