通过利用黑白航片编制一个乡的土地利用现状地图为例，介绍航片数字图像计算机分类和制图的具体方法、步骤。
The approach and steps of computer classification and mapping on digital aerial photo image in a case study of land use mapping of a township is presented in this paper.
结合目前公路设计的现状，浅谈公路设计中数字地图的建立。
Combining with the actuality of highway design, this paper gave a brief talk on the setup of vector digital map in highway design.
分析了矢量电子地图的现状，对采用面向对象的数据模型和数据结构实现矢量电子地图进行了研究。
This paper analyzes the current situation of vector electronic map and investigates the realization of vector electronic map with object-oriented data model and structure.
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