2D Map Visualization of Nationwide LiDAR Digital Elevation Models
Yi-Hsing Tseng
Last modified: 2016-05-03
Abstract
Meter-level resolution Digital Elevation Models (DEMs) have become widely available since airborne LiDAR systems are popular. Although displaying high-resolution DEMs with stereo viewing screen allows us to realistically experience the topographic changes, it is difficult to overlay or inter-analyze with other thematic maps. This study devotes to the theory of deriving topographic parameters from high-resolution DEMs and the visualization of the parameters as raster maps, such as hillshade maps, slope maps, aspect maps, openness maps and multi-directional hillshade maps and so on. These maps enable users to observe topographic features with two-dimensional maps. For demonstration, maps of some example topographic parameters are generated with the Global Mapper. The characteristics and advantages of each topographic parameter will be analyzed through a visual investigation of the maps. The tint scheme and color continuity of multiple frames will be discussed as well. The combination of multiple topographic parameters into a map will also be assessed to display topographic information, which meets the requirements of some particular applications. This study is expected to be useful for a variety of applications of high-resolution DEMs.
Keywords
Visualization, 2D, Digital Elevation Model, Topographic parameter, Raster mapping
References
Chiba, T., Kaneta, S. I., & Suzuki, Y. (2008). Red relief image map: new visualization method for three dimensional data. The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 37(B2), 1071-1076.
Loisios, D., Tzelepis, N., & Nakos, B. (2007, August). A methodology for creating analytical hill-shading by combining different lighting directions. Proceedings of 23rd international cartographic conference, Moscow (p. 78).
Veronesi, F., & Hurni, L. (2014). Changing the light azimuth in shaded relief representation by clustering aspect. The Cartographic Journal, 51(4), 291-300.
Yokoyama, R., Shirasawa, M., & Pike, R. J. (2002). Visualizing topography by openness: a new application of image processing to digital elevation models. Photogrammetric engineering and remote sensing, 68(3), 257-266.
An account with this site is required in order to view papers.
Click here to create an account.