The algorithm based on C Tree can complete the polygon selection and combination operation in high efficiency for given large scale polygon map layer and small output scale.
对于给定的大比例尺地图多边形图层数据，该算法可以高效率地完成多边形选取与合并的综合操作，输出小比例尺地图图层数据。
When a texture map representing an uneven surface is applied to a flat polygon, the surface appears to get flattened.
当使用材质贴图在光滑的多边形上表现一个粗糙的表面时，那个表面看起来像是平坦的。
Note that you can change the coordinates to map any part of the texture to any part of the polygon face.
你可以通过修改纹理坐标来使用任意的部分覆盖多边形表面。
Putting forward the change statistic method based on acreage, and counting the varieties of vector map data by using polygon intersection of vector data and changed pixel of raster data.
提出基于面积的变化统计方法，分别利用矢量数据的多边形交集和栅格数据的变化像素来统计地图矢量数据的变化。
This code will draw a feedback polyline and in the sixth map mouse up a polygon will be created and drawn as shown.
这些代码将会绘制一个反馈的线，当鼠标第六次谈起的的时候，将会创建一个多边形，绘制效果如下所示。
Based on the theory of conformal map, map model is built for planar parametric circle, rectangle and polygon regions. The boundary of parametric region rests with the need of tool path planning.
根据协调映射的理论，建立了平面上圆形域、矩形域、多边形域等参数域的映射模型，可根据轨迹规划的需要来选择映射的边界。
It is the basic function for GIS to get unit polygon by overlaying the vector map, but the uncertainty of polygon is the disastrous factor affecting GIS's data quality.
用矢量基础图件叠加来获取单元图斑的方法是GIS的基本功能，但叠加多边形的不确定性成为影响GIS数据质量的灾难性因素。
Based on figure characteristics of building-polygon, two models of simplification and rectangularity of building-polygon in map generalization were presented in the paper.
依据建筑物多边形的图形特点分析了其在地图综合中两类处理模型：化简与直角化。
According to the user's requirements for map digitization and data structure, this paper designs a "polygon-chain" combined sampling method and a sampling program.
本文从用户对地图数字化采样工艺和数据结构的需求出发，设计了“图斑——链”综合采样方法，并编写了与之相应的程序。
The paper is focused the discussion on the problems of background map digitization, 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。
The paper is focused the discussion on the problems of background map digitization, 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。
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