Does anyone know of a free neighbor database?

Question

Does anyone know of a free neighbor database?

Working with a SaaS application in PHP / Zend and want to provide users with the ability to search in the neighborhood, as well as the radius of the zip code. We tried to find a decent US neighborhood database, but so far we have found very expensive sources.

Has anyone found / built neighborhoods of db either by zip code or by lat / long?

+3

api nearest-neighbor geospatial distance

Richard E Platzek Jun 14 '11 at 17:03

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4 answers

Richard E Platzek · Answer 1 · 2011-06-21T23:19:34+0000

Just found a way to create your own neighborhood database from 2 data sources. One of them is the full file of American zip codes with Lat / Long Centroids. Another is the free USGS file found at http://geonames.usgs.gov/domestic/download_data.htm

, USGS , "Populated Places", . Urbanmapping, - 1 ( Neighborhood API).

zip-, USGS lat/longs, . zip- lat/long lat/long, , . 5 -. :

((ACOS (SIN ('. $. * PI()/180) * SIN ( * PI()/180) + COS ('. $. * PI()/180) * COS ( * PI()/180) * COS (('. $ - ) * PI()/180)) * 180/PI()) * 60 * 1.1515) AS distance

, , , ( ).