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GoogleMaps与GPS定位位置不符的问题
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灵魂收割  
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 More options Nov 7, 11:42 pm
From: 灵魂收割 <mr...@21cn.com>
Date: Sat, 7 Nov 2009 20:42:35 -0800 (PST)
Local: Sat, Nov 7 2009 11:42 pm
Subject: GoogleMaps与GPS定位位置不符的问题
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使用GoogleMaps API JavaScript编写的程序，加上由定位设备（GPS定位仪）测量出来的数据，并显示在地图上，发现定位出来的
数据显示在地图上有偏移。

使用GoogleMaps Control For asp.net 2.0服务器控件编写的程序，GPS定位仪测量出的数据显示在地图上，与“卫星地
图”没有偏移，显示正确，但与“地图”位置有错位！

图片显示如下：
http://bbsattach.uuu9.com/attachment/thumb/Day_091108/1251_1253920_45...
http://bbsattach.uuu9.com/attachment/thumb/Day_091108/1251_1253920_bb...
http://bbsattach.uuu9.com/attachment/thumb/Day_091108/1251_1253920_11...
http://bbsattach.uuu9.com/attachment/thumb/Day_091108/1251_1253920_46...


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灵魂收割  
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 More options Nov 7, 11:53 pm
From: 灵魂收割 <mr...@21cn.com>
Date: Sat, 7 Nov 2009 20:53:23 -0800 (PST)
Local: Sat, Nov 7 2009 11:53 pm
Subject: Re: GoogleMaps与GPS定位位置不符的问题
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欢迎加入QQ群讨论，72351051

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Rosen Jiang  
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 More options Nov 8, 12:33 am
From: Rosen Jiang <rosenji...@gmail.com>
Date: Sun, 8 Nov 2009 13:33:13 +0800
Local: Sun, Nov 8 2009 12:33 am
Subject: Re: GoogleMaps与GPS定位位置不符的问题
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这个很正常，就是这个效果。

2009/11/8 灵魂收割 <mr...@21cn.com>


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Uriel  
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 More options Nov 8, 8:27 am
From: Uriel <uriel...@gmail.com>
Date: Sun, 8 Nov 2009 05:27:18 -0800 (PST)
Local: Sun, Nov 8 2009 8:27 am
Subject: Re: GoogleMaps与GPS定位位置不符的问题
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原因：你生活在天朝
解决方法提示：api里有offset(x,y)功能，就是用来干这个的

On 11月7日, 下午8时42分, 灵魂收割 <mr...@21cn.com> wrote:


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junjiang.liu  
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 More options Nov 8, 9:20 pm
From: "junjiang.liu" <ljunji...@gmail.com>
Date: Mon, 9 Nov 2009 10:20:43 +0800
Local: Sun, Nov 8 2009 9:20 pm
Subject: Re: GoogleMaps与GPS定位位置不符的问题
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没有找到offset这个函数呀，能说具体一些吗？谢谢

2009/11/8 Uriel <uriel...@gmail.com>


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Rosen Jiang  
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 More options Nov 8, 10:08 pm
From: Rosen Jiang <rosenji...@gmail.com>
Date: Mon, 9 Nov 2009 11:08:52 +0800
Local: Sun, Nov 8 2009 10:08 pm
Subject: Re: GoogleMaps与GPS定位位置不符的问题
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offset(x,y)有固定的数值么？

2009/11/9 junjiang.liu <ljunji...@gmail.com>


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illumin  
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 More options Nov 8, 11:31 pm
From: illumin <illumi...@gmail.com>
Date: Sun, 8 Nov 2009 20:31:57 -0800 (PST)
Local: Sun, Nov 8 2009 11:31 pm
Subject: Re: GoogleMaps与GPS定位位置不符的问题
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没有固定数值,各地的偏移值都不同,需要从google查询各个坐标的偏移量

On Nov 9, 11:08 am, Rosen Jiang <rosenji...@gmail.com> wrote:


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Rosen Jiang  
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 More options Nov 8, 11:38 pm
From: Rosen Jiang <rosenji...@gmail.com>
Date: Mon, 9 Nov 2009 12:38:10 +0800
Local: Sun, Nov 8 2009 11:38 pm
Subject: Re: GoogleMaps与GPS定位位置不符的问题
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GControlPosition(anchor:enum GControlAnchor,
offset:GSize<http://code.google.com/intl/zh-CN/apis/maps/documentation/reference.h...>)

貌似看到了相应的构造函数，但是offset:GSize<http://code.google.com/intl/zh-CN/apis/maps/documentation/reference.h...>
如何构造呢？也就是你说的偏移量查询

2009/11/9 illumin <illumi...@gmail.com>


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Uriel  
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 More options Nov 9, 9:08 am
From: Uriel <uriel...@gmail.com>
Date: Mon, 9 Nov 2009 06:08:24 -0800 (PST)
Local: Mon, Nov 9 2009 9:08 am
Subject: Re: GoogleMaps与GPS定位位置不符的问题
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GProjection()
自定义投影，用fromLatLngToPixel和fromPixelToLatLng进行偏移

On 11月8日, 下午6时20分, "junjiang.liu" <ljunji...@gmail.com> wrote:


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Uriel  
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 More options Nov 9, 9:12 am
From: Uriel <uriel...@gmail.com>
Date: Mon, 9 Nov 2009 06:12:34 -0800 (PST)
Local: Mon, Nov 9 2009 9:12 am
Subject: Re: GoogleMaps与GPS定位位置不符的问题
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不是这个，这个只是设置控件位置

没有标准的偏移值，因为经纬度（一般是UTM）和国内坐标系（如xian80之类）之间的转换是加密的、非线性的

On 11月8日, 下午8时38分, Rosen Jiang <rosenji...@gmail.com> wrote:


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