It is one of the most important factors in cartographic generalization to accept or reject geographic elements.

地图综合的重点是地理要素选取与图形概括。

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Using these factors as input and spatial coordinate as expectant output, it is feasible to simulate the spatial distribution of geographic elements by training network.

该函数是由多种因素综合作用的结果，如果以各因素为输入、对应空间坐标值为期望输出，对网络进行训练可对地理要素的空间分布进行模拟。

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And with the demonstrational geographic elements of road and forest, the road design is realized and the constructional method of virtual forest environment is mentioned based on TIN.

并以道路和森林为示范地理要素，初步实现了基于TIN的道路设计，并提出了基于TIN的虚拟森林环境的构建方法。

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