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The New Definition of Cartographic Generalization Based on Conditioned Transformation
Pages: 76-78
Year: Issue:  2
Journal: Hydrographic Surveying and Charting

Keyword:  地图概括数学定义地图符号变换约束条件点集选取夸大;
Abstract: 从较大比例尺地图A编较小比例尺地图B时必须进行地图概括.因此,地图概括中必然存在变换h:A→B.作为选取、夸大等地图概括形式实质上是点集之间在某种约束条件下的变换,不同的约束条件对应着不同的地图概括形式.根据这思路,提出了包括选取、夸大等11种地图概括形式的数学定义.由于依比例符号、不依比例符号和半依比例符号本质上属于地图概括,它的数学定义也可用同样的思路探讨.
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