The Distributed Computing Large - scale Spatial Data Key Issues of Multi - Scale Representation of Spatial Data 对空间数据多尺度表达有关问题的思考
The handle of spatial data is key issue of Geographic Information System ( GIS ). The spatial data can be analyzed and applied when stored and operated in GIS. 地理信息系统(GIS)是以空间数据为研究对象,在实现对空间数据的存储和操作的基础上进行空间分析和应用。
Spatial coordinates of key point are obtained by photogrammetry. Surface precision, repeated deployment precision and errors of key point are analyzed, then experimental results and theoretical analysis are compared with each other. 采用摄影测量的方法获取了支撑桁架关键点的空间坐标,分析了支撑桁架的形面精度、重复展开精度和关键点的误差情况,将实验数据与理论分析进行了对比验证。
Spatial data is key elements to create Grid GIS. 地理空间数据传输是构建网格GIS的基础。
So it becomes increasingly important that efficient query in the enormous spatial data, creating appropriate spatial index is key to the efficient query. 因此在庞大的空间数据中高效的查询也变得越来越重要。所以为数据建立一个好空间索引,是高效查询的关键。