The paper is focused the discussion on the problems of background mapdigitization, dialog box, polygon topology etc.
本文着重讨论底图数字化、对话窗、多边形拓扑等关键问题。
2
The topographic map scanning digitization is an important acquisition method for GIS data, which has become the mainstream of the mapdigitization.
地形图扫描数字化为GIS数据源的一种重要获取手段，已经成为地图数字化的主流。
3
According to the user's requirements for mapdigitization and data structure, this paper designs a "polygon-chain" combined sampling method and a sampling program.