• Corpus ID: 9906987

Visualizing topography by openness: A new application of image processing to digital elevation models

  title={Visualizing topography by openness: A new application of image processing to digital elevation models},
  author={Michio Shirasawa and Ryuzo Yokoyama},
  journal={Photogrammetric Engineering and Remote Sensing},
A new parameter, here termed openness, expressing the degree of dominance or enclosure of a location on an irregular surface, is developed to visualize topographic character. Openness is an angular measure of the relation between surface relief and horizontal distance. For angles less than 90", it is equivalent to the internal angle of a cone, its apex at a DEM location, constrained by neighboring elevations within a specified radial distance. Openness incorporates the terrain line-of-sight, or… 
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