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san wei di tu de ji zhu zhi tu shi yan
Author(s): 
Pages: 91-100
Year: Issue:  1
Journal: Geomatics and Information Science of Wunan University

Keyword:  三维地图机助制图制图物体平面地图视方位角表面交线制图区域高度角试验直观性;
Abstract: In this paper some examples are made to show 3-dimensional maps with different topics.These are made by the computer asisted cartographic method with IBM 370/158 computer and Calcomp ADM in the Lab of Geography Department of UND (Univer- sity of North Dakota).Nowadays three-dimensional maps are gradually used on a larger scale.The reasons are as follows: 1.Many cartographic objects have 3-dimensional surfaces,and a 3-dimensional map,so far as cartographic means is concerned,can reveal the natural feature of the object represented. 2.From the viewpoint of cartographic conception,maps made by perspective me- thods are in beter coincidence with man's view to the reality,therefore map readers can get a concrete impresion easier.Moreover,it is easy to make by means of computer asisted cartography.
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