Oblique Mercator Projection and Its Application in Navigation
LI Zhongmei
ZHANG Meng
BIAN Shaofeng
LI Songlin
Abstract：With the prosperity of seafaring,chart accrracy should meet higher demands. To decrease projection length distor?tion near the ship route,based on which an oblique reference sphere is built by the least square method. On the sphere,the ship route stretch along the 0°parallel. Through establishing the transformation relationship of geographic coordinates between the earth and the oblique reference sphere,oblique Mercator projection is realized. Finally,taking the Malacca Straits as an example,advan?tage of the projection to decrease length deformation and graticules shape distortion are verified,which could be used for both high precision chart making of important channels and providing references for navigation.
Keywords：oblique projectionMercator projectionapplication in navigationleast square methodlength deformation
Publication Date：2019-12-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 54-57 )