what is the best option for in house geocoding service [closed]

StackOverflow https://stackoverflow.com/questions/20809202

Question

I'm looking for a in house geocoding tool to geocode millions of address. I've tried on TIGER database, but it got only about 60% address rooftop. There are addresses way far away from the actual address. My needs are:

1. fast enough to process those millions of address in days
2. rooftop accuracy - shouldn't be too far away (I'll say less than 100 foot mistake)
3. in house service - so it should be free to our internal staff
4. ideally open source, but it's ok to have a one time cost to set it up

Currently I'm looking at application level infrastructure, and I'm open to dedicate map server or something like that. I just don't have enough information to start researching.

Feel free to throw me any ideas, thoughts, comments. I'd love to hear them!

Was it helpful?

Solution

There are two pieces to this problem.

  1. the geocoder and how well it parses addresses and matches them to the reference data set.
  2. the reference data

For 1, I have extracted the parser standardizer from PAGC into a postgresql stored procedure (which is OpenSource) and then built a couple of geocoders using that as the heart of the engine.

For 2, and the accuracy that you are looking for, you will likely need high quality commercial data like Navteq or parcel data. Tiger is good for the cost to get you near the location but Title 13 requires Census to fuzzy the address ranges to no single address can be matched to a Census form. So as you found out, Tiger will not do the job.

I have written a lot of geocoders and have one that will work with Navteq and should give you results that are close to your requirements. Check out http://imaptools.com/ and contact me if your interested.

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