soil texture is an important soil physical property that governs most physical, chemical, biological, and hydrological processes in soils. detailed information on soil texture variability is crucial for proper crop and land management and environmental studies. therefore, at present research, 103 soil profiles were dogged and then sampled in order to prepare digital map of soil texture in bijar...

Digital elevation models (DEM) are an essential component of many geographic information systems (GIS), especially in natural resources applications. Recently, a number of prototype geographic information systems based on quadtrees have been developed. Digital elevation data create special problems for quadtree systems, since neighboring grid cells seldom have identical values. In this paper, w...

Digital Elevation Models commonly known as DEM’s are widely used in Terrain Analysis & image processing applications. A Digital Elevation Model is commonly used for Analysis of various features & objects which are remotely sensed by various devices & Techniques of Modern Era. Detail Literature Review of DEM by referring various Journals & Research papers is proposed in this paper. Various Remot...

High resolution digital elevation models (DEM) are utilized in automatic extraction of single-trees in mixed forests. In this paper the digital surface models (DSM) provided from aerial images with resolutions of 8 cm and 20 cm and airborne laser scanning ALS data are investigated. The results showed a relative good representation of the tree crowns even in image-based DSM. However, increasing ...

The past years needs for Digital Elevation Models and consequently for 3D simulations requested in various applications had led to the development of fast and accurate terrain topography measurement techniques. In this paper, we are presenting a novel framework dedicated to the automatic or semiautomatic processing of scanned maps, extracting the contour lines vectors and building a digital ele...