Hi, On Tue, Mar 29, 2016 at 02:23:48PM -0400, Allan Visochek wrote: > Hey there, > > I'm having trouble making sense of some gaps in the data I am getting from > the nominatim search. > > For a project that I am working on, I need to find the length of various > streets. I've set up a program which does the following and works fine: > > 1. Query the raw osm file for all way elements with a particular name. > 2. For each element, iterate over the node reference tags and retrieve the > longitude and latitude coordinates of each node. > 3. Add the distances between each pair of consecutive nodes if they are > within the boundaries of a particular city. > > Again, this program works fine, I'd be glad to include the code if it would > be helpful, but have left it out for now to keep things concise. > > To save time, I have installed nominatim. My current method is to search > for elements using the street name as a query and return the geojson for > that element: > > /search?q=Chapel+Street&format=json > I've also tried: > /search?format=json&street=Chapel+Street > and I've tried this with a number of different streets. > > The problem here is that a lot of segments of any particular street are > left out. I have checked to verify that my local results are the same as > those
Try to add a dedupe=0 to your parameters, possibly combined with a limit=100. This should give you all the missing segments. You will still have to combine them yourself. There is a feature request open to combine the segments already in the server but so far nobody has found the time to implement it: https://github.com/twain47/Nominatim/issues/332 Kind regards Sarah _______________________________________________ Geocoding mailing list [email protected] https://lists.openstreetmap.org/listinfo/geocoding
