地图分幅 meaning in Chinese

sheet line system

Meanwhile , in 3d - scene , some functions of spatial analysis and interactive operations have been realized . and , a testing application system of 3dcm is developed , which includes tin model construction , the creation of contour , spatial coordinate query , section - cutting , measuring distance and area , 3d visualization and operation about topography and building etc . the purpose of developing testing system is to demonstrate the correctness of 3dcm based on the visualization . finally , the result of the testing and 3dgis research direction is put forward to investigate generally
另外，在三维模型的可视化场景中，实现了一些3dgis的交互操作和空间分析功能，结合论文的目标，开发了一个实验系统，对三维城市的建模方法进行了论证，实现了dem模型的快速构建及等高线的追踪和地图分幅，实现了三维城市模型的可视化，在可视化的基础上实现了部分空间交互操作和空间分析，如：空间坐标查询、断面切割、距离和面积量算、建筑物属性查询、三维动态漫游等。