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post #11 of 12 (permalink) Old 01-27-2007, 06:39 AM
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Carmel Ct and the seven houses on it did not exist when the Honda map disk was made. It was just a driveway leading to a large weed covered lot behind a trashy old farmhouse. The developer (really a one man show who builds the homes and sells them one at a time by himself) tore down the house and put the road in its place. The homes on June Marie Ct are also his work and he was only about half way done building it out and had not started on Carmel Ct when the map data was compiled. How long his plans for the road extensions were filed in advance I do not know but the streets were not as they now appear back in 2002 when the map disk was published. I never looked at Weir Drive in that time frame so I can't comment on it. The Honda map data is also a NAVTEQ product which is why it looks so much like the newer Benz supplied nav data.

I suppose you could say that the reason the Honda lists more street names on the map display is because Honda, all of the Asian imports with OEM nav systems and some European OEM systems like the ones found on newer BMW and Volvo products do not have the nav repeater screen in the instrument cluster like Mercedes or VW which will list the street names you are driving on. This would almost be a logical assumption except that the map disks for the Becker Command in my E Class have always had the same level of street name detail as the Honda disks.

Finally, starting with the 6.1 MB database NAVTEQ has corrected the blunders in the maps that would try to take you down freeway exits that no longer exist to the street level in downtown San Jose because their maps were almost two years behind the actual completion of the freeways through the city and the freeway no longer starts and stops along its path but continues without a break.

The map data on the Becker Commands is stored on the DVD in a compressed format and the database of POI's is much less detailed than the one for the Alpine navs. One very useful feature of the Alpine units is the ability to look up a POI by entering its phone number. That way if I wanted to enter the address of say, an Olive Garden Resturant in San Jose as a destination, all I would have to do is enter the phone number for the place instead of scrolling through a list with every Italian resurant in the area trying to find them.

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post #12 of 12 (permalink) Old 01-27-2007, 08:39 AM
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Here's an example of where I noticed street names where deleted on newer Mercedes DVDs. The picture below is an Alpine Mercedes DVD, version 2002.1, one of the first versions, and shows MERCEDES lane and a few others in Atherton on the screen.

Driving through that same neighborhood more recently, with Alpine Mercedes DVD version 2006.2 did not display those street names on the screen. I had to click on them instead so an info screen with street name would pop up, or drive onto the street, so the name would apprear at the bottom. I assumed the names were deleted to speed up the panning speed of the display....

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