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Accuracy of local topographic variables derived from digital elevation models

by Igor V. Florinsky , 1998
"... We study the accuracy of data on some local topographic attributes derived from digital elevation models (DEMs). First, we carry out a test for the precision of four methods for calculation of partial derivatives of elevations. We find that the Evans method is the most precision algorithm of this k ..."
Abstract - Cited by 37 (3 self) - Add to MetaCart
We study the accuracy of data on some local topographic attributes derived from digital elevation models (DEMs). First, we carry out a test for the precision of four methods for calculation of partial derivatives of elevations. We find that the Evans method is the most precision algorithm

Research Article Accuracy of local topographic variables derived from digital elevation models

by Igor V. Florinsky
"... Abstract. We study the accuracy of data on some local topographic attributes derived from digital elevation models (DEMs). First, we carry out a test for the precision of four methods for calculation of partial derivatives of elevations. We ® nd that the Evans method is the most precision algorithm ..."
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Abstract. We study the accuracy of data on some local topographic attributes derived from digital elevation models (DEMs). First, we carry out a test for the precision of four methods for calculation of partial derivatives of elevations. We ® nd that the Evans method is the most precision algorithm

Extracting topographic structure from digital elevation data for geographic information system analysis. Photogrammetric Engineering and Remote

by S. K. Jenson, J. O. Domingue - Sensing , 1988
"... ABSTRACT: Software tools have been developed at the U.S. Geological Survey’s EROS Data Center to extract topographic structure and to delineate watersheds and overland flow paths from digital elevation models. The tools are special purpose FORTRAN programs interfaced with general-purpose raster and ..."
Abstract - Cited by 235 (0 self) - Add to MetaCart
ABSTRACT: Software tools have been developed at the U.S. Geological Survey’s EROS Data Center to extract topographic structure and to delineate watersheds and overland flow paths from digital elevation models. The tools are special purpose FORTRAN programs interfaced with general-purpose raster

Research Article Derivation of topographic variables from a digital elevation model given by a spheroidal trapezoidal grid

by Igor V. Florinsky
"... Abstract. Digital elevation models (DEMs) given by spheroidal trapezoidal grids are more appropriate for large regional, sub-continental, continental and global geological and soil studies than square-spaced DEMs. Here we develop a method for derivation of topographic variables, speci ® cally horizo ..."
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Abstract. Digital elevation models (DEMs) given by spheroidal trapezoidal grids are more appropriate for large regional, sub-continental, continental and global geological and soil studies than square-spaced DEMs. Here we develop a method for derivation of topographic variables, speci ® cally

2002: Quantifying uncertainty of digital elevation models derived from topographic maps

by Qihao Weng - Advances in spatial data handling: 10th International Symposium on Spatial Data Handling
"... This paper explores a methodology for quantifying the uncertainty of DEMs created by digitising topographic maps. The origins of uncertainty in DEM production were identified and examined. The uncertainty of DEM data was quantified by computing a vector total of Root Mean Square Error (RMSE) from th ..."
Abstract - Cited by 17 (0 self) - Add to MetaCart
This paper explores a methodology for quantifying the uncertainty of DEMs created by digitising topographic maps. The origins of uncertainty in DEM production were identified and examined. The uncertainty of DEM data was quantified by computing a vector total of Root Mean Square Error (RMSE) from

Permanent Scatterers in SAR interferometry

by Ro Ferretti, Claudio Prati, Fabio Rocca - IEEE Transactions on Geosci- ence and Remote Sensing
"... Abstract—Temporal and geometrical decorrelation often pre-vents SAR interferometry from being an operational tool for sur-face deformation monitoring and topographic profile reconstruc-tion. Moreover, atmospheric disturbances can strongly compro-mise the accuracy of the results. In this paper, we pr ..."
Abstract - Cited by 222 (10 self) - Add to MetaCart
Abstract—Temporal and geometrical decorrelation often pre-vents SAR interferometry from being an operational tool for sur-face deformation monitoring and topographic profile reconstruc-tion. Moreover, atmospheric disturbances can strongly compro-mise the accuracy of the results. In this paper, we

Accuracy assessment of automatically derived digital elevation models from ASTER data in mountainous terrain

by S. Eckert, T. Kellenberger, K. Itten - International Journal of Remote Sensing , 2005
"... (ASTER) aboard the Terra satellite was designed to generate along-track stereo images. The data are available at low cost, providing a feasible opportunity for generating digital elevation models (DEMs) in areas where little or no elevation data are yet available. This study evaluates the accuracy o ..."
Abstract - Cited by 20 (0 self) - Add to MetaCart
(ASTER) aboard the Terra satellite was designed to generate along-track stereo images. The data are available at low cost, providing a feasible opportunity for generating digital elevation models (DEMs) in areas where little or no elevation data are yet available. This study evaluates the accuracy

STATISTICAL EVALUATION OF FITTING ACCURACY OF GLOBAL AND LOCAL DIGITAL ELEVATION MODELS IN IRAN

by F. Alidoost, F. Samadzadegan
"... Digital Elevation Models (DEMs) are one of the most important data for various applications such as hydrological studies, topography mapping and ortho image generation. There are well-known DEMs of the whole world that represent the terrain’s surface at variable resolution and they are also freely a ..."
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Digital Elevation Models (DEMs) are one of the most important data for various applications such as hydrological studies, topography mapping and ortho image generation. There are well-known DEMs of the whole world that represent the terrain’s surface at variable resolution and they are also freely

Terrain Analysis Using Digital Elevation Models in Hydrology

by David Tarboton , 2003
"... This paper describes methods that use digital elevation models (DEMs) in hydrology, implemented as an ArcGIS toolbar using Visual Basic and the ESRI object library. I describe generalized channel network delineation to objectively estimate drainage density and by using terrain curvature accommodate ..."
Abstract - Cited by 30 (1 self) - Add to MetaCart
spatially variable drainage density. The multiple flow direction field determined from a DEM also serves as a basis for routing overland and topographically driven subsurface flow useful in water quality, erosion and terrain stability modeling. New DEM derived quantities, such as downslope influence

Research Article The choice of window size in approximating topographic surfaces from Digital Elevation Models

by M. Albani, B. Klinkenberg, D. W. Andison, J. P. Kimmins
"... Abstract. Quantitative surface analysis through quadratic modelling of Digital Elevation Models (DEMs) is a promising tool for automatically describing the physical environment in ecological studies of terrestrial landscapes. Fundamental topographic variables such as slope, aspect, plan and profile ..."
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Abstract. Quantitative surface analysis through quadratic modelling of Digital Elevation Models (DEMs) is a promising tool for automatically describing the physical environment in ecological studies of terrestrial landscapes. Fundamental topographic variables such as slope, aspect, plan and profile
Results 1 - 10 of 903