CAJ | 학술논문

选用国家测绘地理信息局官方网站上的等差分纬线多圆锥投影世界地图为研究数据，特别考虑了极点在该投影上的弧长为赤道投影长度的一半的重要性质，采用选取参考点、曲线拟合等方法得出了等差分纬线多圆锥投影的正解变换公式，还采用二分法实现了该投影的反解变换。用户可以在相应的GIS软件中实现各类专题地图的输出和出版时使用这一公式，这一公式还可以与已有的投影类型一道作为用户调用投影的基本代码模板，解决了在以前出版的此类投影的世界地图中各经线和纬线不能完全对称的问题。当然这一公式并没有考虑面积变形和角度变形，因此使用此投影公式制成的成图的比例尺也不准确，这一缺陷有待于进一步深入研究。
선용국가측회지리신식국관방망참상적등차분위선다원추투영세계지도위연구수거，특별고필료겁점재해투영상적호장위적도투영장도적일반적중요성질，채용선취삼고점、곡선의합등방법득출료등차분위선다원추투영적정해변환공식，환채용이분법실현료해투영적반해변환。용호가이재상응적GIS연건중실현각류전제지도적수출화출판시사용저일공식，저일공식환가이여이유적투영류형일도작위용호조용투영적기본대마모판，해결료재이전출판적차류투영적세계지도중각경선화위선불능완전대칭적문제。당연저일공식병몰유고필면적변형화각도변형，인차사용차투영공식제성적성도적비례척야불준학，저일결함유대우진일보심입연구。
Based on the world map of equivalent different latitude parallel polyconic projection posted on the net by State Bureau of Surveying and Mapping , especially considering the important property that the projection length of the geographic poles is half the length of the equatorial projection , the reference points selecting , curve fitting, etc are utilized.This essay finally suggests the forward solution to this projection .This essay also utilizes the bisection method to carry out the reverse solution of this projection .Users are a-ble to execute the map making and publishing with this projection method , which is also used as the code template users invoke , as well as many renowned projection types .In addition , this projection method also solves the problem of incomplete symmetry .This pro-jection method , however , does not take area and angle variation seriously , causing the inaccuracy in terms of using legends , calling for further research .