球体八叉树网格编码修正及与传统坐标的变换  

Modified sphere geodesic octree grid coding and its mutual conversion with traditional coordinate system

作　　者：张古彬[1] 禄丰年[2] 曾涛[1] 王金鑫[3] 赵光成 ZHANG Gubin;LU Fengnian;ZENG Tao;WANG Jinxin;ZHAO Guangcheng(Henan Institute of Geological Survey,Zhengzhou 450001,China;Henan Bureau of Geo-exploration&Mineral Development,Zhengzhou 450012,China;School of Geoscience and Technology,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]河南省地质调查院,郑州450001 [2]河南省地质矿产勘查开发局,郑州450012 [3]郑州大学地球科学与技术学院,郑州450001

出　　处：《测绘科学》2020年第11期154-160,共7页Science of Surveying and Mapping

基　　金：河南省科技攻关项目(152102210031);河南省高等学校基础研究计划重点科研项目(16A170003);地理空间信息与数字技术国家测绘地理信息局工程技术研究中心开放基金项目(SIDT2017501);河南省地质矿产勘查开发局2018年财政规划项目(豫地矿2018030)。

摘　　要：针对原有球体测地线八叉树网格(SGOG)编码存在的长而无序、不适宜径向大尺度地理空间剖分、与OSG模型渲染机制不能很好兼容的缺陷,该文提出了修正SGOG编码方案。该方案严格遵守SGOG编码模型,修改了编码的方法与次序,精简了编码长度,优化了内涵结构,面向整个地球系统空间的剖分,方便后续的建模处理;在上述基础上,设计并实现了修正SGOG编码与空间直角坐标的相互转换算法,进而以空间直角坐标为中介,实现了修正SGOG编码到地理坐标系的换算。研究结果表明,修正SGOG编码方法可以很好地解决原编码方式的缺陷,提升了建模的效率与效果,有利于推动SGOG的进一步应用。Aiming at the defects of the original SGOG coding,such as long and disordered,unsuitable for large scale radial geospatial segmentation,and incompatible with OSG model rendering mechanism,a modified SGOG coding scheme was proposed.This scheme strictly followed the SGOG coding model,modified the coding method and order,simplified the coding length,optimized the connotation structure,and faced the space division of the whole earth system,which was convenient for subsequent modeling.On the basis of the above,the mutual conversion algorithm between modified SGOG coding and Spatial Cartesian coordinates was designed and implemented,and then the conversion from modified SGOG coding to geographic coordinates was realized by taking Spatial Cartesian coordinates as the intermediary.The results showed that the modified SGOG coding method could solve the defects of the original coding method,and improved the efficiency and effect of modeling.The method in this paper enriched the SGOG subdivision theory and promoted its further application.

关 键 词：地球剖分网格 地球系统空间网格 球体测地线八叉树网格 四元三角网 编码 坐标转换 

分 类 号：P208[天文地球—地图制图学与地理信息工程]