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能否添加BD09直接转WGS84的方法 #22

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HPDell opened this issue Dec 19, 2017 · 7 comments
Open

能否添加BD09直接转WGS84的方法 #22

HPDell opened this issue Dec 19, 2017 · 7 comments

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@HPDell
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HPDell commented Dec 19, 2017

我使用BD09转GCJ02然后再转WGS84好像产生了很大偏差。但是使用python版本的BD09直接转WGS84的方法偏差不是很大。
@wandergis
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收到，这几天会测试看下误差，如果误差不大就加进去。

@HPDell
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HPDell commented Dec 20, 2017

确实有一定误差。图中这个应该是一套数据的，但是通过python和js分别转出来，就变成了两套点。

image

@wandergis
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wandergis commented Dec 20, 2017 •
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 const coordtransform = require('coordtransform');
 var bd09towgs84 = function bd09towgs84(lng, lat) {
    var mid = coordtransform.bd09togcj02(lng, lat);
    return coordtransform.gcj02towgs84(mid[0], mid[1]);
  };

  var wgs84tobd09 = function wgs84tobd09(lng, lat) {
    var mid = coordtransform.wgs84togcj02(lng, lat);
    return coordtransform.gcj02tobd09(mid[0], mid[1]);
  };

@HPDell 你试试这两个函数，测试了几个转换结果跟python的一样的，你帮忙根据你这个业务场景再测试下，谢谢啦

@vmvz
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vmvz commented Mar 27, 2018

误差这么大, 不好用呀, 哪些地图可以直接获取 wgs84?

@HPDell
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HPDell commented Mar 28, 2018 via email

@vmvz
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vmvz commented Mar 28, 2018

@HPDell Bing 不知道可以不可以

@HPDell
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HPDell commented Mar 28, 2018 via email

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@vmvz @wandergis @HPDell