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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