CAJ | 학술논문

为解决墨卡托投影在高纬极区变形过大而不适用的问题，分析了极球面投影的极区投影变形、经纬线形状以及大圆航线与直线的逼近程度，结果表明：极球面投影能够克服墨卡托投影不足，可满足极区海图投影要求；推导了航程及航向误差公式并分析了其变化规律，结果表明：极球面投影上直线代替大圆航线具有可行性，证明了极区极球面投影的可用性。
위해결묵잡탁투영재고위겁구변형과대이불괄용적문제，분석료겁구면투영적겁구투영변형、경위선형상이급대원항선여직선적핍근정도，결과표명：겁구면투영능구극복묵잡탁투영불족，가만족겁구해도투영요구；추도료항정급항향오차공식병분석료기변화규률，결과표명：겁구면투영상직선대체대원항선구유가행성，증명료겁구겁구면투영적가용성。
Availability and error analysis of polar stereographic projection are given to solve the pro-blem of M ercator projection not being adaptable to polar regions . Projectional distortions , longitude and latitude as w ell as max deviation of great-circle line from straight line on the polar stereographic charts are systematically analyzed .T he results indicate that the polar stereographic projection can overcome the shortcomings of M ercator projection and meet the requirements of po -lar navigation . T he deduction of the formulas of errors in distance and course and the analysis of the rule of change verify the feasibility of the approximate treatment and the availability of polar stereographic projection .