Thirdly , it utilizes line tracking and douglas - peucker line - simplification algorithm to realize the raster - to - vector conversion . a triangulated irregular network ( tin ) is constructed based on vector data , and dem point - array data is computed by interpolating grid on tin 第三,使用轮廓线跟踪算法和dpl多边形近似方法实现等高线数据的矢量转换;并基于等高线矢量数据建立不规则三角网,再内插格网生成dem点阵数据。
Meanwhile the national science foundation funded the creation of the national technology grid to connect university scientists with high - end computers , nasa started work on its information power grid ( which had similar goals ) , and the doe initiated pioneering work on applying grids to science research 美国航太总署也开始研发具有类似目标的资讯力格网；能源部则针对格网应用到科学研究这部份，展开创新的工作。
It has helped that almost all efforts to develop grid systems build on the globus toolkit , but it was clear that well - defined , community - based technical standards would be essential if grid computing were to expand beyond its initial users 几乎所有的格网系统都是根据全球工具套件开发出来的，这一点能提供一些帮助；不过，若希望格网运算能普及到原有的使用者之外，显然必须具备一套定义清楚、而且是以社群为基础的技术标准。
