The Use of Terrain Height Information for Improving the Accuracy of Classification of Landsat Data.

摘要

One potentially important area of work in remote sensing is the use of topographic data in conjunction with satellite imagery to improve the accuracy of classification algorithms. This Memorandum is concerned with techniques for using terrain height data in conjunction with Landsat imagery. An algorithm is described that transforms digitised height contours into an equispaced grid of points. A method is also described which utilises this height matrix to derive the magnitude and direction of the slope of the terrain, information which can in turn be used to calculate the variation in direct solar illumination over an area. Finally, techniques are described for using terrain data to improve the accuracy of multispectral classification of Landsat data. (Author)