To follow up on a question below slightly differently: Is Nominatim data at the street level only? Or does the dataset include house numbers as well? I'm trying to get a feel for how much data might have house numbers vs. just street level data. Any information here would be helpful - if metro areas have house number data generally, or other details.
Thanks! Charles On Mon, Oct 15, 2012 at 3:08 PM, Charles Randall <[email protected]>wrote: > Thanks for the responses Sarah. I didn't understand address details fully > before, but on second read it makes sense. Thanks for all the info! > > Charles. > > > > On Mon, Oct 15, 2012 at 2:01 PM, Sarah Hoffmann <[email protected]> wrote: > >> Hi, >> >> On Mon, Oct 15, 2012 at 11:33:17AM -0700, Charles Randall wrote: >> > Hey all - >> > I've got a couple of random Nominatim questions for the group: >> > >> > a. Nominatim accuracy: A number of times, when I put in a specific house >> > address for Nominatim, I get back a lat long, which doesnt vary with >> street >> > numbers. >> > - I assume this is because of the data files used. >> >> This happens, when the house numbers are not in the database, then the >> coordinate of the street is returned. >> >> > - Do people do anything to make these more accurate? >> >> You can always survey house numbers and add them to the OSM database. >> >> > b. Address details option in URL: >> > I'm curious, if I set the nominatim query string to have the option >> > "addressdetails=1", what exactly is coming back in the data I see >> returned? >> > I feel like the different sets of place id's returned is the lat long >> > address details of the other street options that are listed on the main >> > screen when you do a query. >> >> I'm not sure I understand that question. What you get back with >> addressdatails >> is a list of the parts of the address together with their designation >> (street, >> city, county, country, etc.) >> >> > c. Are there particular xml files for US address data that some people >> find >> > are more accurate than others? >> >> Not sure how that relates to Nominatim. It's primary source is data from >> OSM, >> there are no other xml files. You'll find different excerpts in the >> internet >> but they all come from one source - OpenStreetMap. >> >> For the US, it can also be made to use Tiger house number data on top of >> the >> OSM data, which will most help with your problem from question 1. I can't >> really comment on the accuracy of this additional TIGER data. Maybe others >> know better. >> >> Sarah >> > >
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