Thread: China City Navigator NT 2010.21 (CH) for Garmin

Thanks to the available for download, that this map 3D and JCV file?
Also, why don't thank me for moderators, although I did not provide a map download links, but I was the first to offer this map of the trail of Oh, haha, a joke!
I am a Chinese, of course, is like a Chinese map, thanks!

China City Navigator NT 2010.21 JCV
[Only registered and activated users can see links. ]

some post says PID-33. But you should try using FID WITHOUT PID for the first try, because only a portion of mobile phone require PID.

And don't worry if you find unlocked map generated with gmaptool is 200+ Mb less in size. The loss is believed to be photo-quality QSI, which could be displayed on hi-end Garmin PNAs only. @ the meantime, non-qsi map contributes a lots to performance.

Tested on Garmin Mobile XT on HTC Touch HD at home
Seems does not need offset correction file (namely the 6kiB GMAPPROM.IMG file) to find the right location

Originally Posted by lh128

Tested on Garmin Mobile XT on HTC Touch HD at home
Seems does not need offset correction file (namely the 6kiB GMAPPROM.IMG file) to find the right location

Would you please perform following steps before give this try?
1.backup your poi file
2.delete /save folder
3.delete 6kb gmapprom.img and oem img.
4.reboot your PPC/PNA or whatever
5.Change "lock position to road " to "display actual position"
6.restart Garmin

I'm interested with your reviews, because I met some troubles with this. And some other comments on DIY this map suggest some difference.

Originally Posted by lh128

Hey, sorry for the late reply. Kinda busy last week.

I started this time with a new ROM flash (it will delete everything) and cleared my storage card with a card reader. So it's as clean as new.
But of course I installed Chinese language support to display Chinese characters. It only involves copying a font file and modifying some registry key.

First, extract the file downloaded in this forum > GPS Navigation Systems > Navigation Softwares > [Windows CE 6.0] Garmin Mobile XT v5.00.30w ASN
Sorry my account does not have the privilege to post a direct link.
It only includes Mobile XT program, without gmapprom.img or anything.

Then, use the "you know what" to generate an sw.unl file.

Finally, copy the base map and unlocked detailed map provided in the first post, and change settings in Tools - Settings - Map - Show Location, from "on roads" to "at GPS location".

I walked from office to subway station, and subway to home. The position was correct all the way.

Hope it's helpful.

Is that because the map had already been corrected? Or Garmin finally tried of making offset?

Originally Posted by godeyes

Is that because the map had already been corrected? Or Garmin finally tried of making offset?

First, further tested with other base map and ruled out the possibility of that.

Then tested with older version of China map (701 NT17) and I'm way off the point as expected. My location on the old map was about 500m NW. But the position is correct with map 760 and 2010.21.
On other hand, my coordinate was quite different during the test. On newer maps, my coordinate was about 500m SE from the actual one, according to Google Earth.

So the conclusion is: From version 760 on, the former offset correction file, namely the 6kiB GMAPPROM.IMG file, is included in the map and will change the coordinate instead of change position showed on the map. Anyone with a problem displaying those maps should consider upgrading their software to support the integrated file.

And Garmin will certainly continue making offset, as long as it stays in business in China. The government believes the coordinate is "national security" issue and requires all map publishers make offset, thought anyone now can just download Google Earth and have the exact coordinate.