Thread: Venus Series City Navigator China NT CHS 2011.11

Originally Posted by syzygy

Similar to the two subfiles above, only the firmware/software in some Garmin China and Garmin Taiwan products can recognize this bin file and activate the shift adding (not the mythical correcting) feature.

This sounds strange to me, cause this bin file was provided by Garmin USA to customers who bought the China NT map from their website and faced the shifting issue. After this, USA/EU devices had also no shifting anymore. Please note that the file is original from Garmin. Maybe its not limited to China or Taiwan devices, maybe the bin file works only for a limited amount of Nuvi models

Originally Posted by syzygy

However, the recorded waypoints, routes and tracks will all have shifted coordinates which cannot be exchanged with Google Earth and other regular GPS products/software.

Some good news and updates regarding the saved data. The new Oregon 450 and Oregon 550 sold by Garmin China can save both un-shifted and shifted coordinates now. A great improvement. Other new devices like 62S sold in China may have the same feature, but not confirmed yet.

For Oregon 450:
If no SD card is inserted, the coordinates saved in the internal memory will be shifted.
If an SD card is inserted, the coordinates will be saved in SD card only but are un-shifted.

For Oregon 550:
If an SD card is inserted, shifted and un-shifted coordinates will be saved in the internal memory and SD card respectively at the same time.
Not sure which verison will be saved when no SD is inserted. Most likely shifted.

ander7724:

the most remarkable advantage from Venus is the resultant performance. With official release the QSI (Quick Search Index) and ISM (precious & better cross-boarder/blocks plan) are expected, but GS QSI is only available in limited portion of Garmin Series hardware.

I think, without confirm with syzygy, ISM is no way to work with Venus, nor could it be Venus-ed.

mentioned bin file from hardware firmware, must exist with official map, and must be removed with Venus map.

Originally Posted by betahash

I think, without confirm with syzygy, ISM is no way to work with Venus, nor could it be Venus-ed.

It's not clear to me if ISM.IDX contains any shifted data that needs to be corrected or not. Judging by its extension IDX, I guess it should contain indices for searching purpose only and needs no correction.

If you have an official Garmin China device, you certainly can choose to install the official map or the Venus (optionally with QSI and ISM) map. Just need to make sure the shift adding feature provided by the bin file is or is not activated respectively. For all other devices, Venus map (without QSI and ISM) is the only choice left for China NT map.

Originally Posted by betahash

I just guess from the result plans and its names:
1. idx = index = properties , relationship and namespace alias
2. Any kind of alias must have a way to locate unique GPS record/mark. And vice versa.
3. Venus maps has unreliable distant-trip plan ---> such kind of coordination and alias seems less valid.
4. if the shifted GPS marks are used by aliases and their indexes, it might be impossible to offer a Venus version. In such a case precondition #1-2 ( #2 might be a false one) in this case might not be satisfied.-- e.g., for multi-connected points in several blocks , which are already orphan OR folded in Venus, their relationships and properties are already broken . Even their namespace aliases are consistent with corrected GPS marks, it will not work any more.

And for this reason and this result, inter-blocks {route} Mechanism is hard to rebuild in Venus.

Above is not based on any kind of research as syzygy has already done. I just tried to discuss this possibility in viewpoints of database and data structures --- could be nonsense as well.

Ander:
junction=crossing query
Intersection might be detailed address ( street, bld. number ) query. I have no such a device, try yourself.

My understanding of an index is: it is a key that helps the associated search algorithm to find the queried item quicky, without going through each item one by one. An index normally contains search key related data and pointers only, not all data of the queried item.

For example, a telephone book sorted by last names may provide you with an index table that maps A, B, C (keys) to the page number (pointers) of the first page containing last names starting with A, B, C respectively. You will not find a person's first name, address or phone number in the index table. Because of this, even if you update a person's phone number you don't need to update the index table. The same search algorithm will work just fine.

Now, treat the road name, ISM.IDX and coordinate as the last name, index table and phone number of the example above respectively. To search an address or junction, you will go through the index table ISM.IDX. Once you find it, you can look up additional info like coordinates and road side of the matched item. But like a phone book, correcting a coordinate will require no changes to the index table ISM.IDX and the same search algorithm will work just fine.

If there are route planning or routing issues, they should come from somewhere else, especially the NET and NOD subfiles. I would not think the ISM.IDX subfile is the culprit to cause wrong route planning and routing.

So is there every going to be an English version of City Navigator NT 2011.11 ?

Originally Posted by shimsim

So is there every going to be an English version of City Navigator NT 2011.11 ?

Unlikely in the near future. Note that even the 2011.11 CHS version has not been officially announced and released for download. What we have is copied out from a new Garmin China retail product.

Originally Posted by syzygy

Note that even the 2011.11 CHS version has not been officially announced and released for download. What we have is copied out from a new Garmin China retail product.

Speak of the devil, ...
Garmin China just announced the availability of 2011.11 maps for registered users to download. See

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