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
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