极区横向坐标系的极球面投影特性及使用方法  

Polar stereographic projection characteristics and using method of transverse coordinate system in polar regions

作　　者：温朝江[1] 卞鸿巍[2] 胡耀金 WEN Chaojiang;BIAN Hongwei;HU Yaojin(Unit No.92941,Huludao 125000,China;College of Electrical Engineering,Naval Univ.of Engineering,Wuhan 430033,China)

机构地区：[1]92941部队,辽宁葫芦岛125000 [2]海军工程大学电气工程学院,武汉430033

出　　处：《海军工程大学学报》2024年第5期21-26,共6页Journal of Naval University of Engineering

基　　金：国家自然科学基金资助项目(41506220,41406212,41201478)。

摘　　要：根据极区横向坐标系与航海图配合使用需要,研究了极球面投影极区航海图上横向坐标系的投影特性及使用方法。首先,根据横向坐标系定义和极球面投影公式,推导了极球面投影海图上横向坐标系经纬线和子午线收敛角的投影公式;然后,结合极区航海图的图幅规格、类型和航海绘算要求,对单幅海图上横向经纬线格网形态和横向子午线收敛角分布特性进行了定量分析,给出了图上横向坐标系格网及横向子午线收敛角的使用方法;最后,根据极球面投影航海图上各航向基准的几何关系,得到基于横向子午线收敛角的横向航向、真航向和地理航向的相互转换关系,形成了横向坐标系在极球面投影极区航海图上的初步使用方案,可为后续极区航海图编制使用、电子海图显示及信息系统研制提供参考依据。According to the requirements of transverse coordinate system in conjunction with arctic nautical charts in polar regions,projection characteristics and using method of transverse coordinate system on polar stereographic projection arctic nautical charts were systematically studied.Firstly,formulas of transverse meridian and parallel lines as well as transverse meridian convergence angle were deduced from transverse coordinate system′s definition and polar stereographic projection formulas.Secondly,according to nautical plotting requirements of arctic nautical charts as well as the sheet size and type,the geometric features of transverse meridian and parallel lines and the distribution characteristics of transverse meridian convergence angle on a single arctic nautical chart sheet were quantitatively analyzed.And then the using methods of transverse coordinate system projection grid and transverse meridian convergence angle were presented on polar stereographic projection nautical charts.Finally,transformation formulas among transverse course,true course and grid course were presented based on the geometry relationships of three coordinate systems and the mediating effect of transverse meridian convergence angle.The results of the research provide a preliminary usage scenario of transverse coordinate system on polar stereographic projection arctic nautical charts,and will serve as references for the subsequent compilation and using of arctic nautical charts as well the development of ECDIS-Polar.

关 键 词：横向坐标系 极区航海图 极球面投影 

分 类 号：P282[天文地球—地图制图学与地理信息工程]