[postgis-users] What street-level database are you using?

[Bruce Saunders]

We  also looked into using NavTech data, but have (for now) stuck with 
the TIGER files.  The primary consideration for the NavTech data was to 
get the details to perform routing (one way streets, turn restrictions, 
etc).  I think the other providers (TeleAtlas and GDT) have these 
details as well.  For now, we've decided to go without the ability to 
calculate routes.

IMHO, I think that the TIGER data is pretty good for most general 
purpose geocoding.  Now if you are trying to send an ambulance 
somewhere... Well, I hope you are using the best comercial data.

Mind if I ask what kind of "fuzzy-string" base geocoding you are 
performing?  I've precomputed double metaphones for the TIGER data we 
are using and search off of that (then score the results with a variety 
of different weighting algorithms).  At the time of initial 
implementation, I didn't see any obvious "fuzzy-string" operators.  Are 
you just doing regular expression searches, or something more 
elaborate?  We will be conducting some performance tests in the coming 
weeks... If I get permission, I'll post the results to the group.

-Bruce

Lowther, David W wrote:

>And don't forget Navtech, although you'll have to sign a non-disclosure
>agreement before you'll get pricing. When I looked into this I liked
>Teleatlas the best, but we ended up staying with TIGER.
>
>Dave
>
>
>  
>
>>-----Original Message-----
>>From: Paul Ramsey [mailto:pramsey at refractions.net] 
>>Sent: Thursday, November 20, 2003 11:29 PM
>>To: PostGIS Users Discussion
>>Subject: Re: [postgis-users] What street-level database are you using?
>>
>>
>>Hi Jason,
>>In the States, your options break down to:
>>
>>- TIGER (old, scruffy, unreliable, but free!)
>>- TeleAtlas
>>- GDT
>>
>>If you have more time than money, an interesting project would be 
>>trying to decode the data underlying Microsoft Streets.
>>
>>Paul
>>
>>On Thursday, November 20, 2003, at 08:14 PM, Jason Garman wrote:
>>
>>    
>>
>>>Hi fellow PostGIS'ers...
>>>
>>>First I'd like to extend my thanks for producing an excellent system
>>>that even a GIS newbie such as myself was able to set up a PostGIS 
>>>system quickly.  I've currently set up a PostGIS table with 
>>>      
>>>
>>Tiger/Line 
>>    
>>
>>>data (right now a few counties in Maryland) and set up some 
>>>      
>>>
>>queries to 
>>    
>>
>>>perform primitive geocoding using the data.  PostgreSQL performs 
>>>admirably, returning fuzzy-string based geocode results in 
>>>      
>>>
>>well under 
>>    
>>
>>>100ms for most searches.
>>>
>>>My question is, are there any commercial data sources for 
>>>      
>>>
>>street-level
>>    
>>
>>>geocoding products for the US available that are reasonably 
>>>      
>>>
>>priced and 
>>    
>>
>>>have easy import options into PostGIS?  I've done some cursory 
>>>searches and I haven't found any real information on this subject.
>>>
>>>Thanks
>>>-- jason
>>>
>>>
>>>_______________________________________________
>>>postgis-users mailing list postgis-users at postgis.refractions.net
>>>http://postgis.refractions.net/mailman/listinfo/postgis-users
>>>
>>>      
>>>
>>      Paul Ramsey
>>      Refractions Research
>>      Email: pramsey at refractions.net
>>      Phone: (250) 885-0632
>>
>>
>>_______________________________________________
>>postgis-users mailing list postgis-users at postgis.refractions.net
>>http://postgis.refractions.net/mailman/listinfo/postgis-users
>>
>>    
>>
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