The Subdivision of Partial Grid Based on Discrete Global Grid Systems
Yongsheng Zhang · Acta Geodaetica et Cartographica Sinica · 2009
Firstly,the paper analyzed the essentiality of generating partial grids based on the application and requirement of discrete global grid systems. And then,we brought forward the fundermental thought of generating partial grid which is under the discrete global grid frame,and discussed the detailed edge problems of partial high-precision grid. Started with the ubiety between a point and a spherical triangle,we discussed the ubiety between a point and a spherical random polygon,and then edge simplifying algorithm of spherical random polygon are studied,as well as co-relationship between points and spherical random polygon,grid district clipping based on spanning the developed surface and grid data hierarchical creating algorithm. In the end we prove exactness and efficiency of the algorithm through the experiments.