Hi Cliff, I have only recently heard about NavTech data being used in 
conjunction with a geocoding engine. I have only good things about their 
accuracy for the areas that they cover and I was hoping someone on the 
MapInfo L group could provide some feed back. I have cut and pasted a couple 
of items from the NavTech website.
Derek

1. What can your database do for me that the other map databases can't?
The NAVTECH database enables:
- The best address location/geocoding in the industry
- Optimized route sequencing
- Legal routes and accurate driving directions
- Dynamic route guidance
- The most accurate vehicle tracking

4. How was the map database built? Is it simply a modified TIGER file (TIGER 
was created by the US government for census estimating purposes) or was it 
built with in-the-field research, aerial photos, proprietary 
state-of-the-art software and a thorough quality assurance and certification 
process?
Only Navigation Technologies uses a tested systematic in-the-field 
research-build process. Navigation Technologies uses USGS quad sheets (for 
positional accuracy) combined with aerial photographs and field collected 
and verified data. Navigation Technologies is the only map database builder 
and supplier that does not use the highly inaccurate TIGER file. Every 
NAVTECH database goes through a rigorous quality assurance test and receives 
a release certificate before it is shipped.

5. How often is the map database updated? Who does the updating, where?
Only the NAVTECH database is updated 4 times a year by a field network of 
more than 45 offices throughout North America. Our field staff drives more 
than one million miles a year performing extensive verification and 
validation of additions and changes to the road network.

6. When using the database for geocoding, what can I expect my address 
matching success rate to be? Is this to the exact street location or just 
'in the neighborhood'?
With Navigation Technologies you can reliably achieve an address matching 
success rate to the exact street location in excess of 95%.

7. Can the database produce legal driving directions? Can it produce them 
reliably?
Only Navigation Technologies enables the creation of legal and reliable 
driving directions.

8. Does the database come with any sort of accuracy and completeness 
warranty?
Only the NAVTECH database is backed with an accuracy and completeness 
warranty.

9. What is your expertise in building and maintaining map databases?
Navigation Technologies was the first company to build a navigable map 
database and continues to be the global leader in map database construction 
and innovation.

10. What other companies use the map database for vehicle routing, 
scheduling and tracking or route guidance?
The world's largest and most trusted companies use the NAVTECH database 
including Federal Express, the United States Postal Service, New York Times 
and Whirlpool for fleet scheduling and routing. Other companies that have 
chosen Navigation Technologies over the competition include BMW, Mercedes 
Benz, Lexus, Acura, Kenwood, Alpine, Honda and Toyota among many others.



>From: "Clifford J. Mugnier" <[EMAIL PROTECTED]>
>Reply-To: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>
>To: 'D W' <[EMAIL PROTECTED]>
>Subject: RE: MI re: NavTech data in MapMarker 5.0 Plus supposed to be the 
>most accurate
>Date: Mon, 16 Aug 1999 20:42:18 -0500
>
>Derek,
>
>Exactly what are you talking about?  I have never heard of
>Navtech data.  Data concerning what?
>
>Cliff
>
>Clifford J. Mugnier ([EMAIL PROTECTED])
>The Topographic Engineering Laboratory
>Department of Civil and Environmental Engineering
>UNIVERSITY OF NEW ORLEANS
>New Orleans, Louisiana  70148
>
>Voice and Facsimilie: (504) 280-7095
>
>On Monday, 16 August, 1999 12:01 PM, D W
>[SMTP:[EMAIL PROTECTED]] wrote:
> > Hi, has or is anyone using NavTech data in their
>Geocoding
> > software? I have
> > heard it is the most accurate database for geocoding out
> > there. Thanks.
> > Derek
> >
> >
> >
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