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I followed the instructions at: http://www.letseehere.com/postgis-geocoder-using-tiger-2010-data

To get postgres working with postgis, but some of the addresses are off 500 ft to as much as 1 mile in my random sampling. Do you know of any more reliable data sets?

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    Tiger/Line is only as good as the data submitted to it; there are commercial vendors (TomTom/TeleAtlas or Nokia/Navteq) that are much more accurate but also will cost you several thousands of dollars. For free geocoding/routing of data your good choices are highly limited.
    – D.E.Wright
    Mar 9, 2012 at 19:09
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    @D.E.Wright Seems a better answer than comment. :)
    – Nathanus
    Mar 9, 2012 at 19:49

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Tiger/Line is only as good as the data submitted to it; there are commercial vendors (TomTom/TeleAtlas or Nokia/Navteq) that are much more accurate but also will cost you several thousands of dollars. For free geocoding/routing of data your good choices are highly limited.

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If you are looking for other geocoding data sources, you would probably benefit by searching and reading previous discussions on this site (with the tag [geocoding]), but a couple specifics I would recommed reading are:

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You can get a ready to run server with all TIGER 2013 data loaded as Amazon AWS Server (AMI). See here: http://www.tigergeocoder.com/. I found it to be pretty good, TIGER data improved a lot from 2011 edition. 2012 and 2013 are pretty good data wise.

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