| 墨卡托投影最佳基准纬线确定方法 |
| |
| 引用本文： | 叶彤,黄毅,焦晨晨,金立新.墨卡托投影最佳基准纬线确定方法[J].海洋测绘,2021(1):41-46. |
| |
| 作者姓名： | 叶彤 黄毅 焦晨晨 金立新 |
| |
| 作者单位： | ;1.海军工程大学导航工程系;2.91001部队;3.中国地质大学地理与信息工程学院;4.甘肃铁道综合工程勘察院有限公司 |
| |
| 基金项目： | 国家自然科学基金(41871376；41971416；41771487)；湖北省杰出青年科学基金(2019CFA086) |
| |
| 摘 要： | 针对海图制图中墨卡托投影以投影区域中纬线作为基准纬线投影变形大的问题,分别在投影区域长度变形最小、面积变形最小和边纬线长度变形相等的条件下确定最佳基准纬度。以北半球为例,3种条件下确定的基准纬度均大于中纬度,南北纬度差为10°、20°、30°、40°时,与中纬度差值最大分别为2.0936°、5.0621°、9.1315°、13.5536°。3种条件下确定的基准纬度分别有最小的整体长度变形、整体面积变形以及长度最大变形,可根据不同需求选取合适的基准纬度。
|
| 关 键 词： | 海图制图 地图投影 墨卡托投影 投影变形 基准纬线 |
Method for Determining Optimal Standard Parallel of Mercator Projection |
| |
| YE Tong,HUANG Yi,JIAO Chenchen,JIN Lixin.Method for Determining Optimal Standard Parallel of Mercator Projection[J].Hydrographic Surveying and Charting,2021(1):41-46. |
| |
| Authors: | YE Tong HUANG Yi JIAO Chenchen JIN Lixin |
| |
| Abstract: | Due to the large deformation of Mercator projection,if taking the mid-latitude as the standard parallel,the standard parallel is determined under the condition that length deformation is minimal,area deformation is minimal and the length deformation of the edge latitude line is equal.Taking the northern hemisphere as an example,the standard parallel determined under the three conditions is greater than the middle latitude.When the latitude range is 10°,20°,30° and 40°,the maximum difference value from the middle latitude is 2.0936°,5.0621°,9.1315° and 13.5536° respectively.The length and area deformation and the maximum deformation are improved respectively.Therefore,a suitable standard parallel can be selected according to different needs. |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《海洋测绘》浏览原始摘要信息 |
| 点击此处可从《海洋测绘》下载免费的PDF全文 |
|
