极地研究2017，Vol.29Issue(4)：454-460,7.DOI:10.13679/j.jdyj.2017.4.454
一种适用于极区的横轴墨卡托海图
A TRANSVERSE MERCATOR CHART SUITABLE FOR POLAR REGIONS
王海波 1张汉武 1张萍萍 2王军 2郝勇帅3
作者信息
- 1. 海军大连舰艇学院航海系,辽宁大连 116018
- 2. 海军大连舰艇学院研究生管理大队,辽宁大连 116018
- 3. 海军大连舰艇学院导弹系,辽宁大连 116018
- 折叠
摘要
Abstract
Polar regions are located at high latitudes. There may be several choices for chart projection of polar regions, including Mercator projection, polar stereographic projection, gnomonic projection, Lambert con-formal projection and transverse Mercator projection. The Mercator projection introduces an increasingly large deformation near the polar regions and deformation of infinity at the poles on the chart. With polar stereographic projection, the rhumb line is not straight on the chart. Gnomonic projection is not conformal projection, therefore, it is very difficult to measure range and bearing directly on the chart. On a Lambert conformal chart, longitude is represented by angle. With the transverse Mercator projection, almost all lines of latitude and longitude are curved. Hence, none of the aforementioned projection is particularly suitable for safe polar navigation and reliable chart work. To solve the above problems, a false graticules is con-structed and the problem of transforming between false and true latitude and longitude is solved. A transverse Mercator chart based on this false graticules is drawn using Matlab. The characteristics of this new type of chart are similar to those of a Mercator chart and there is still deformation distortion in the polar region, but lines of false longitude and false latitude are mutually parallel and respectively orthogonal. Overall, this new type of chart would be convenient for doing polar chart work.关键词
极区航海/伪经纬线网/航海图/横轴墨卡托投影/海图切换Key words
polar navigation/false graticules/navigation chart/transverse Mercator projection/chart change引用本文复制引用
王海波,张汉武,张萍萍,王军,郝勇帅..一种适用于极区的横轴墨卡托海图[J].极地研究,2017,29(4):454-460,7.
