Advances in Locally Adaptive Interpolation of Digital Elevation Models
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Quantifying uncertainty in elevation models using kriging
Raster based digital elevation models (DEM) are the basis of some of the most important GIS workflows: hydrologic modeling, site suitability, and cost path analysis. While there are several techniques for generating digital elevation models (DEMs), none of them can produce a true elevation surface. Locally varying measurement error and the inexactness of the interpolation methods contribute to ...
متن کاملEvaluating optimized digital elevation precipitation model using IDW method (Case study: Jam & Riz Watershed of Assaloyeh, Iran)
A watershed management program is usually based on the results of watershed modeling. Accurate modeling results are decided by the appropriate parameters and input data. Precipitation is the most important input for watershed modeling. Precipitation characteristics usually exhibit significant spatial variation, even within small watersheds. Therefore, properly describing the spatial variation o...
متن کاملDetermination of Large-scale Digital Elevation Model in Wooded Area with Airborne Lidar Data by Applying Adaptive Quadtree-based Iterative Filtering Method
Generation of large-scale digital elevation (or terrain) models of wooded areas is fundamental to LIDAR data’s application in forest management to a large extent. In this paper, a new method is proposed and implemented, which is characterized by its combination of adaptive quadtree-based processing with common iterative interpolation and filtering methods. Digital elevation models (DEM) of wood...
متن کاملEffect of digital elevation model’s resolution in producing flood hazard maps
Flooding is one of the most devastating natural disasters occurring annually in the Philippines. A call for a solution for this malady is very challenging as well as crucial to be addressed. Mapping flood hazard is an effective tool in determining the extent and depth of floods associated with hazard level in specified areas that need to be prioritized during flood occurrences. Precedent to the...
متن کاملDEM Reconstruction Based on Adaptive Local RBF
As the core of digital elevation model, interpolation methods have been run through the each link, such as production, quality control, accuracy assessment, analytical applications and etc. The local radial basis function interpolation method based on spatial relationship of natural neighbor was proposed in this paper. The interpolation reference points were chosen by the Delaunay Triangulation...
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