Re: Zip Code Proximity

Does anyone happen to have a copy of the zips.zip file from the census
bureau? Their FTP server is uncooperative.


Dustin Sallings wrote:
>
> On Thu, 18 May 2000, Jeff Hoffmann wrote:
>
>         I tried to get a few permutations of that to work, but with no
> luck.  The following will give a list of all places sorted by how far away
> from my house they are:
>
> select zipcode, city, state, point(latitude, longitude) as point
>     from zips
>     order by point_distance(location_of(95051), point(latitude,longitude))
>
> I defined the function location_of for my own convenience:
>
> create function location_of(integer) returns point as
>     'select point(latitude, longitude) from zips where zipcode = $1 '
>     language 'sql'
>
> # > select zip, location <@> '(lat, lon)'::box
> # >   from zipcodes
> # >  order by location <@> '(lat, lon)'::box
> # >  limit 10;
> # >
> #
> # oops, typo.  those boxes should be points.  plus, it looks like you can
> # get zipcodes & lat-longs from the census at:
> #
> # http://ftp.census.gov/geo/www/gazetteer/places.html
> #
> #
>
> --
> dustin sallings                            The world is watching America,
> http://2852210114/~dustin/                 and America is watching TV.

--
Paul Dlug
Unix/Web Programmer