Title :
Comparison of popular methods for simplifying terrain based on grid DEMs
Author :
Dong Youfu ; Tang Guoan
Author_Institution :
Coll. of Civil Eng., Nanjing Univ. of Technol., Nanjing, China
Abstract :
It is very necessary to construct multi-scale DEMs. And terrain simplification algorithms based on DEMs of high resolution offer an effective solution to approach multi-scale DEMs. Taking Very Important Points and Three- Dimensional Douglas-Peucker as examples, this paper evaluates popular methods for simplifying terrain from dense grid DEMs by extracting and comparing elevation statistical parameters, elevation autocorrelation information, terrain structural characteristics and terrain basic factors. The results show that there are much difference of the DEMs generated by the two methods. Users of DEMs should be aware of the strengths and weaknesses of the different methods in addition to their own special purpose before producing multi-scale DEMs.
Keywords :
digital elevation models; geographic information systems; statistical analysis; terrain mapping; dense grid DEM; digital elevation model; elevation autocorrelation information; elevation statistical parameters; multiscale DEM construction; terrain basic factors; terrain simplification algorithm; terrain structural characteristics; three-dimensional Douglas-Peucker; Biological system modeling; Computers; Digital elevation models; Feature extraction; Mathematical model; Surface topography; Tin; Digital Elevation Models; Terrain Simplify; Three-Dimensional Douglas-Peucker; Very Important Points;
Conference_Titel :
Environmental Science and Information Application Technology (ESIAT), 2010 International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-7387-8
DOI :
10.1109/ESIAT.2010.5568378
