[gps-talkusers] Re: Skewed POI Data

Hello Joleen,
A lot of fixes to the original map data in your home town has occurred since the 2007 data, for instance blocks which use to have address ranges from 200-300 now have the correct address range of 100-200. Your house being at the wrong end of your street is an issue, but even Google has your home at the other end of your street and Google uses both Navteq data as well as TeleAtlas. Obviously there were city planning map issues made initially and the base maps were incorrect from the start for your home town. To fix these issues will take TeleAtlas and Navteq some time to sort out, but I am confident they will eventually fix them. Currently there isn't an easy way to inform TeleAtlas of map errors as they have switched to a Flash based map error reporting mechanism which is not accessible. However, Sendero is planing on creating our own web page to enter in errors for TeleAtlas be this will take some time to implement.
As for POIs being off by 100 feet or more is normal, all POIs from TeleAtlas are located at the street so proper routing can be made for vehicles. Sendero has put in the building blocks to allow users in the future to re-position the Off-street locations of businesses to the front door of these establishments, and we plan when route creation to use both the on-street and off-street locations of POIs to create more blind-friendly routes to the businesses front door. I don't not yet when this functionality will be added but steps have been put in place to make this possible moving forward. 

Thank you
Charles


At 04:54 PM 10/30/2008, you wrote:

Hi All,
Sadly, the Version 5 POI database is still very skewed in my home area. My church, for example is about 500 feet off from the POI data. My home is at the wrong end of the block. Starbucks should be on the corner of 1st and Main, but when I go to 1st and main in virtual mode, Starbucks is 107 feet away. Loney's Harvest Food on South 2nd is more than a block away from its actual location. If I place my virtual location at 2nd and Morton, the real Loney's is on the southeast corner of that intersection. True enough, the actual store is set far back from 2nd Avenue with its parking lot in front of it. However, the GPS POI places it north of Maple, 782 feet north of itself.
The POI data for my Hair salon, Special FX, is in close approximation with the POI data for Loney's and this is also far off. In reality, it is near 2nd street in the Loney's parking lot. the POI is, indeed, near Loney's, but this puts it more than a block away from itself.
The YMCA is on the southeast corner of Birch and Park. The POI data puts it >100 feet away, North of Birch on park.
some businesses seem to be close to their actual location but on the wrong side of the street. 

The map indicates that Birch Street does not go through at 2nd.
It indicates that the intersection does not line up, but in reality it does. There are many streets that do not line up here, but this is not one of them. I would still say that the database is still so confused here that it makes the GPS POI data of little value. What can be done to correct this? I thought that Tele Atlas was to have come here to check things out.
Would it be helpful if I visit several businesses that I know to be off and set a user POI and send the file to Sendero, would this help fix the problems?
Please know that these are not isolated samples. They are just places where I am vary familiar and can easily visit them in virtual mode. I purchased this upgrade very hopeful that the anticipated corrections had been made to the map for my area. 

Joleen




Charles M. La Pierre
CTO Sendero Group
"The GPS company." Distributors of the mPower, PK, Victor Stream, Voice Sense, KNFB Mobile Reader, Talks, Miniguide and ID Mate 
1-888-757-6810

Lat. 37 15' 25" N  Lon: 121 53' 04" W

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