[postgis-users] Geocoding

[Dan Putler]

While not PostGIS based, there is C-based PAGC (www.pagcgeo.org) that  
does do batch geocoding, and could be configured to run under CGI as  
a web based application. PAGC is designed to work with shapefile  
sets, and can be easily customized to work with any address ranged  
road network file (albeit, less customization will be needed for US  
and Canadian layers).

There are problems with TIGER/Line, but its performance is actually  
not that much worse than commercial products. The following link may  
be of some interest on this:

http://lagic.lsu.edu/LGISC/Presentations/2005/LGISC-PRES-20050420- 
Geocoding_Evaluation.pdf

In terms of commercial products, a road network layer for a single  
state runs around $1000 to $1500.

Dan

On 2-Feb-07, at 12:39 PM, Brad Ediger wrote:

> Yes, the TIGER/Line data can be horribly inaccurate, and the Navteq/ 
> Tele Atlas data is horribly expensive.
>
> Google Maps provides a geocoder web service (http://www.google.com/ 
> apis/maps/documentation/#Geocoding_Examples) via HTTP but it is  
> rate-limited to 50,000 requests per day. They have some commercial- 
> use restrictions, IIRC, and you can't use any of the GMaps services  
> for real-time tracking. But it might fit the bill.
>
> Their commercial-use service is pretty darn expensive, too. Starts  
> at $10,000 per year and goes up from there.
>
> hth,
> Brad
>
> On Feb 2, 2007, at 2:29 PM, Rob Tester wrote:
>
>> I think that the task of geocoding is fairly easy and I have  
>> written a geocode function that uses PostGIS. However, the problem  
>> is where to get the data. In the U.S. you can use Tiger line data  
>> from the census, but it is horrible inaccurate.  If you have  
>> resources you can purchase more accurate data from other companies  
>> like Navteq, or manually correct the census data.
>>
>>
>> Rob.
>>
>>
>>
>>
>> From: postgis-users-bounces at postgis.refractions.net  
>> [mailto:postgis-users-bounces at postgis.refractions.net] On Behalf  
>> Of Stone, Matthew (DHS-HISP)
>> Sent: Friday, February 02, 2007 1:15 PM
>> To: postgis-users at postgis.refractions.net
>> Subject: [postgis-users] Geocoding
>>
>>
>> Does/Will PostGis have a Geocoding routine built in such as ArcSDE  
>> has locators and geocoding processing?  I am curious, as geocoding  
>> is the building block of any GIS work I do and I have need of  
>> decent open-source solutions that can process millions of records  
>> in a batch mode, or can be implemented on the WEB as a “geocoding  
>> service” either again in batch mode, or real time via other web- 
>> based applications.  I understand the limitations of this  
>> functionality in an open-source environment, namely the ability of  
>> getting decent reference data, but am curious all the same.
>>
>>
>> Maybe a module could be built that accesses the geocoding services  
>> provided by Google or Yahoo, of MS Virtual Earth??????
>>
>>
>> Just thought I would throw this out there.
>>
>>
>> Matthew
>>
>>
>> Matthew Stone, MPH
>> UCSF/CA Dept. of Health Services
>> Health Information & Strategic Planning (HISP)
>>
>> Office of County Health Services (OCHS)
>>
>> 1501 Capitol Ave MS 5204
>>
>> Mailing Address:
>> PO BOX 997413, MS 5204
>> Sacramento CA 95899-7413
>>
>> Physical Address:
>>
>> 1501 Capitol Avenue, Suite 71.5195, MS 5204
>>
>> Sacramento, CA 95814
>>
>> _____________________________
>>
>> PH: 916-552-9918
>> FAX: 916-552-8260
>>
>> mstone at dhs.ca.gov
>>
>>
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