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(A Tool to fix offline Chinese maps)修正

 
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audgg



Joined: 23 Dec 2010
Posts: 4

PostPosted: Thu Dec 23, 2010 11:50 am    Post subject: (A Tool to fix offline Chinese maps)修正 Reply with quote

可能大家都遇到使用Trekbuddy离线地图时,GPS定位偏差很大。

这个小软件可以修正trekbuddy所使用的中国地图的偏差。将下载后的地图用本软件在PC机上校正,然后放到手机上,可以精确定位。

欢迎使用和提出意见。

软件说明:
1. What is for
It can fix the map tiles downloaded from Googlemaps, Yahoo maps, and any other Chinese electronic maps. Especially it is used to fix the GPS distortions of Chinese maps used by trekbuddy(http://www.trekbuddy.net/forum/). Now it has been tested when working with tar and un-tar format maps downloaded by software "Mobile Atlas Creator 1.8".

2. How to use
Run TrekbuddyCNfix.exe by double click under windows(possibly you need to install .Net 2.0 from Microsoft).Choose the directory where your downloaded map tiles e.g. d:\src\TrekbuddyCNfix\test (uder test\, there should be some folders named like Beijing 01\, Bijing 02...) and then click start button. It is a little slow and single-thread, so you can divide your maps into several parts regarding to the zoom level, and run the software several times independently. After the software finishes the job, you will find a directory named ??_fix at the same directory which you choose at the blank box in the interface. Then, copy the directory ended with _fix into your mobile phone.

3. How it works
It stretches the maps downloaded according to the distortion data of each map tile (size of 256*256).

4. Thanks to
trekbuddy: http://www.trekbuddy.net/forum/
GPS distortion data: http://blog.csdn.net/guidebee/archive/2010/05/22/5616414.aspx
FreeImage: http://freeimage.sourceforge.net/
Tar: http://www.gnu.org/software/tar/
flyinwind2006: comments and tests.

5. Warrant and responsibility
It is free and without any warrant. The author will never respond for any trouble when using this software.

6.Questions or bugs?
Email to liangyuxu@gmail.com any time.



trekbuddyCNfix.rar
 Description:
解压后运行

Download
 Filename:  trekbuddyCNfix.rar
 Filesize:  2.53 MB
 Downloaded:  129 Time(s)

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xbs20032000



Joined: 10 Jan 2011
Posts: 2

PostPosted: Tue Jan 11, 2011 12:29 pm    Post subject: Reply with quote

非常感谢,就是速度太慢了,25M就要等几十分钟
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audgg



Joined: 23 Dec 2010
Posts: 4

PostPosted: Wed Jan 12, 2011 2:55 am    Post subject: Reply with quote

xbs20032000 wrote:
非常感谢,就是速度太慢了,25M就要等几十分钟


嗯,是有点慢。因为要把所有图片都需要重新解码压缩一遍,压缩图片比较消耗时间。
还可以将地图按照级数分开校正,这样如果计算机是多核的话,能快一点。

不过仅仅需要修正一次就一劳永逸了,呵呵。
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xbs20032000



Joined: 10 Jan 2011
Posts: 2

PostPosted: Wed Jan 12, 2011 6:17 am    Post subject: Reply with quote

但是这是目前最好用的校正工具了,再一次非常感谢 Very Happy
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liveman



Joined: 20 Jan 2011
Posts: 1
Location: 47

PostPosted: Thu Jan 20, 2011 1:09 pm    Post subject: Reply with quote

非常感谢,这就下,哈哈
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lsmwell



Joined: 10 Feb 2011
Posts: 1

PostPosted: Thu Feb 10, 2011 1:31 am    Post subject: Reply with quote

太感谢了哈~~
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ouranos



Joined: 16 Feb 2011
Posts: 2

PostPosted: Mon Feb 21, 2011 3:36 am    Post subject: Reply with quote

真的非常感谢,实践证明修正的结果很准确,至少在珠三角西边的广州,中山,珠海很准确。另外有一个问题想请教楼主,可以做一个修正gpx坐标在工具吗?因为从google map上生成的gpx文件中在坐标也是未经过修正的,所以放在tb中会与地图路径不吻合,如果能把这个也修正了那就完美了! Very Happy
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audgg



Joined: 23 Dec 2010
Posts: 4

PostPosted: Wed Feb 23, 2011 9:39 am    Post subject: Reply with quote

ouranos wrote:
真的非常感谢,实践证明修正的结果很准确,至少在珠三角西边的广州,中山,珠海很准确。另外有一个问题想请教楼主,可以做一个修正gpx坐标在工具吗?因为从google map上生成的gpx文件中在坐标也是未经过修正的,所以放在tb中会与地图路径不吻合,如果能把这个也修正了那就完美了! Very Happy


这个倒是很容易做,我一般也不用这些类似导航的功能,充其量也就是定个位,基本就能保证不迷路了。
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lostpsyche



Joined: 09 Apr 2011
Posts: 1

PostPosted: Sat Apr 09, 2011 7:29 am    Post subject: Reply with quote

好东西,下载了进行修正,还比较精确,谢谢楼主奉献
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ouranos



Joined: 16 Feb 2011
Posts: 2

PostPosted: Thu Oct 27, 2011 7:55 am    Post subject: Reply with quote

为什么这几天我用mobile atlas creator 1.8下载了好几次google map(china ditu),在使用楼主工具时都会出错(fatal error),大意是说某个坐标(tx=XX ty=XXX)的参数不能为空之类,请楼主帮助解决。先谢了!要特别说明的是,下载的地图小(单个城市),似乎没有这个问题,只要是大地图(一个省或好几个市)就会出现,而且都是出现在最大级别(16、17级)的地图修正时!!!
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