摘要
区域面积计算是区域分析的基础。随着空间信息剖分组织理论的发展,地球剖分网格受到广泛关注,并且显示了在空间大数据组织能力上的潜力。球面空间与欧式空间不同胚导致地球剖分网格规格不一的特征,在进行区域面积计算时需要先将网格转换回对应的经纬度范围,再进行积分运算,流程复杂,计算效率不高。由此本文根据GeoSOT全球参考网格的剖分方案,基于矩阵变换的分块、邻接操作以及向量的乘法运算,设计了一种可以摆脱经纬度和积分运算的面积计算方法,并针对此方法设计实验验证了其可行性和高效性,为网格体系下区域面积计算提供一种新思路。
Area calculation is the basis of regional analysis. With the development of geospatial information subdivision organization theory, the discrete global grid has been widely concerned and shows the potential of spatial big data organization capabilities. Different spherical shapes in the spherical space and the European space lead to different features of the earth＇s subdivision grid. When calculating the area, the grid needs to be converted back to the corresponding latitude and longitude range, and then the integral operation is performed. The flow is complicated and the calculation efficiency is not high. Therefore, based on the GeoS OT global subdivision grid reference scheme, a feasible and efficient area calculation method that can get rid of latitude and longitude and integral operation is designed based on matrix transformation including block division and adjacency, and vector multiplication operation. The feasibility and efficiency of the algorithm have been examined, and the method provides a new idea for area calculation under the global grid system.
作者
齐澄宇
程承旗
濮国梁
陈波
QI Chengyu;CHENG Chengqi;PU Guoliang;CHEN Bo(Institute of Remote Sensing and Geographic Information System,Peking University,Beijing 100871,China;College of Engineering,Peking University,Beijing 100871,China)
出处
《地理信息世界》
2018年第3期17-21,共5页
Geomatics World
基金
国家重点研发计划项目(2017YFB0503700)
高分辨率对地观测系统国家重大专项(11-Y20A02-9001-16/17
30-Y20A01-9003-16/17
30-Y30B13-9003-14/16)
测绘地理信息公益性行业科研专项(201512020)资助
关键词
区域面积
剖分网格
矩阵变换
region area
subdivision grid
matrix transformation
