Leveling of DEM Generated from Satellite Data for Mosaicking
Gaurav Vashisth1, A. D. Prasad2
1Gaurav Vashisth, Geomatics Engineering Section, Department of Civil Engineering, Indian Institute of Technology Roorkee, India.
2A. D. Prasad, Department of Civil Engineering, Indian Institute of Technology Roorkee, India.
Manuscript received on April 05, 2013. | Revised Manuscript received on April 28, 2013. | Manuscript published on May 05, 2013. | PP: 312-318 | Volume-3, Issue-2, May 2013. | Retrieval Number: B1582053213/2013©BEIESP
Open Access | Ethics and Policies | Cite
© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Digital Elevation Model finds use in wide range of applications. Often the study area in such applications is very large, which needs the mosaicking of the adjacent smaller DEM tiles. When adjacent DEMs are mosaicked together then systematic errors such as vertical offset and tilt between the DEM tiles can produce visible discontinuities along the borders of the overlapping areas. The standard mosaicking procedures reduces just the inconsistencies at the boundaries of the areas of overlap; the remaining portion of DEM tiles is left uncorrected. The method proposed in the paper uses the cell values present in the overlap region to reduce the vertical offsets and the tilt present in the DEM tiles so that they can be subsequently used for preparing mosaic of DEM tiles.
Keywords: GIS, DEM, Leveling, Mosaic, Errors, Cartosat