问题描述
我在WGS84中有一个GPS坐标,我想使用或JavaScript中的。
I have a GPS-coordinate in WGS84 that I would like to transform to a map-projection coordinate in SWEREF99 TM using PROJ.4 in Java or Proj4js in JavaScript.
很难找到的文档以及如何使用它。如果你有一个很好的链接,请发表评论。
Its hard to find documentation for PROJ.4 and how to use it. If you have a good link, please post it as a comment.
是 + proj = utm + zone = 33 + ellps = GRS80 + towgs84 = 0,0,0,0, 0,0,0 +单位= m + no_defs
我试图使用用于转换 Lat:55°00'N,长:12°45'E
并尝试使用此代码:
I have tried to use a PROJ.4 Java library for transforming Lat: 55° 00’ N, Long: 12° 45’ E
and tried with this code:
String[] proj4_w = new String[] {
"+proj=utm",
"+zone=33",
"+ellps=GRS80",
"+towgs84=0,0,0,0,0,0,0",
"+units=m",
"+no_defs"
};
Projection proj = ProjectionFactory.fromPROJ4Specification(proj4_w);
Point2D.Double testLatLng = new Point2D.Double(55.0000, 12.7500);
Point2D.Double testProjec = proj.transform(testLatLng, new Point2D.Double());
这给我点 Point2D.Double [5197915.86288144,1822635.9083898761]
但我应该 N:6097106.672,E:356083.438
我做错了什么?我应该使用什么方法和参数?
正确的值取自。
我不确定是否 proj.transform(testLatLng,new Point2D.Double());
是正确的使用方法。
I am not sure if proj.transform(testLatLng, new Point2D.Double());
is the right method to use.
推荐答案
55是纬度还是经度?
55 is latitude or longitude?
编辑:看起来你应该简单地交换lat和long参数。
it seems you should simply swap lat and long parameters.
EDIT2:ie
Point2D.Double testLatLng = new Point2D.Double(12.7500, 55.0000);
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