wrong position offset between satellite pictures and local map in Shanghai China
search in google maps for:
91号 赤峰路, Yangpu, Shanghai, 上海市, China
which will point at a famous road in Shanghai.
Now switch between Satellite images and painted map. Notice the difference?
Using Ubuntu Firefox 3.5 I notice an offset of about 500-600 meters. The addresses position fits correctly at the map but is
wrong at the satellite image.
Can you confirm if that is a bug?
for China instead.
In China, the built-in iPhone Maps application is distorted and will
show you a position that is 300-1000m randomly from reality. The
ABCMaps application is to align the maps to the real place.
ABCMaps is Chinese only applcation now. However, it is so easy to use.
So even you can not read Chinese you can use it also. The English
version will come out in the future.
Find out where you are really in China. If you travel in China,
sometimes you will be troubled by China maps offset. The ABCMaps application is to align automatically the maps to the real place .
If available in your area, real-time traffic conditions will be
displayed over the road as color-coded lines by click "Traffic" button.
What's New In Version 1.30
1. English support added
2. Traditional Chinese support added
3. Small bug fix for iOS 3.0
On the Nexus One [HTC] Google phone there is also an occasional offset issue.
In Beijing it is generally accurate to within a few metres. However in other parts of China there seem to be offset issues. After crossing the border from Hong Kong [where everything was perfect] and into Shenzhen the offset was at least 100 metres off. The GPS locator showed one's position as being way off the road one was on.
The offset as sometimes appears in mobile apps is very similar to that seen in Google Maps on a PC/Mac. The overlay of roads on the satellite view drops out after a certain level, but buy flipping between the two of overlaying the transport/metro system it can be seen that there is an offset of several metres.
To be specific the offset is 530 metres NEE [approx 60 degrees] between the Street Map position and the Satellite View position.
This issue definitely appears to be China specific. Overlays are perfectly aligned even in countries like Burma [Myanmar], but on crossing the Chinese border the discrepancy occurs. It is likely that this is all part of the Chinese authority's 'war on Google' and is not likely to get any better. Google has apparently failed to obtain a licence for its mapping service, a requirement set in 2010, and looks set to be blocked on May 1st.
As regards a solution, there is unlikely to be one other than to use another mapping provider.
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