单词	hill shading
释义	hill shading hill shading A method of representing relief on a map by depicting the shadows that would be cast by high ground if light were shining from a certain direction. hill shading hill shading [′hil ‚shād·iŋ] (mapping) Also known as hillwork; plastic shading; relief shading; shading. A method of showing relief on a map by simulating shadows by assuming oblique sunlight from the northwest so that slopes facing south and east are shaded. The pictorial effect created by this method. hill shading One of the methods of indicating heights or relief on a map. A bright light is assumed to be shining across the map sheet so the shadows are cast by high grounds. The map appears stereoscopic by optical illusion. However, some details tend to get obliterated by the shadows, and hence this method is not extensively used.
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