Abstract
DEMs, thus, simply regular grids of elevation measurements over the land surface.The aim of the present work is to produce high resolution DEM for certain investigated region (i.e. Baghdad University Campus\ college of science). The easting and northing of 90 locations, including the ground-base and buildings of the studied area, have been obtained by field survey using global positioning system (GPS). The image of the investigated area has been extracted from Quick-Bird satellite sensor (with spatial resolution of 0.6 m). It has been geo-referenced and rectified using 1st order polynomial transformation. many interpolation methods have been used to estimate the elevation such as ordinary Kriging, inverse distance weighted (IDW) and natural neighbor methods. The mosaic algorithm has then been applied between the base and building layers of studied area in order to perform the final DEM. The accuracy assessments of the interpolation methods have been calculated using the root-mean-square-error (RMSE) criterion. Finally, the estimated DEMs have been used to constructing 3-D views of the original image.
Highlights
A digital elevation model (DEM) is a digital representation of ground surface topography or terrain
Digital elevation modeling (DEM) is one of the modern methods for representing the topographic surface of the terrain
DEMs being generated by many methods, such as ground survey, photogrammetry, Light Detection and Ranging (LIDAR), and Global positioning system (GPS) techniques which have been adopted to generate high resolution digital elevation model [1,2]
Summary
A digital elevation model (DEM) is a digital representation of ground surface topography or terrain. Digital elevation modeling (DEM) is one of the modern methods for representing the topographic surface of the terrain, (i.e., how the elevation of the ground surface is changing with position). This has been done by contour lines on topographic maps. DEMs being generated by many methods, such as ground survey, photogrammetry, Light Detection and Ranging (LIDAR), and Global positioning system (GPS) techniques which have been adopted to generate high resolution digital elevation model [1,2].
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