Rails - May 2007 - How do I implement a simple geographic information database with zip/postal code calculations

Hi,

Sorry that this topic is not really rails-specific, but I happen to be
implementing it in rails.  I''m trying to implement a common scenario,
where you get a comprehensive list of states/provinces, cities, and
zip/postal codes, and you find nearby cities based on a specified
location, like on some of the dating sites.  I have no clue where to
start, I''m not even sure what keywords I should use to search.  If
anyone can point out to me how this is usually done, I would really
appreciate it.

Thanks!

Bob


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> Sorry that this topic is not really rails-specific, but I happen to be
> implementing it in rails.  I''m trying to implement a common
scenario,
> where you get a comprehensive list of states/provinces, cities, and
> zip/postal codes, and you find nearby cities based on a specified
> location, like on some of the dating sites.  I have no clue where to
> start, I''m not even sure what keywords I should use to search.  If
> anyone can point out to me how this is usually done, I would really
> appreciate it.
Start here:

http://www.zipcodedownload.com/

Get one of the packages that includes lat/long coordinates.  Then just do 
earth-distance calculations and you''re done.

We use that to drive this: http://www.cardplayer.com/poker_room

-philip

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On May 10, 12:48 pm, Philip Hallstrom
<r...-SUcgGwS4C16SUMMaM/qcSw@public.gmane.org>
wrote:
> > Sorry that this topic is not really rails-specific, but I happen to be
> > implementing it in rails.  I''m trying to implement a common
scenario,
> > where you get a comprehensive list of states/provinces, cities, and
> > zip/postal codes, and you find nearby cities based on a specified
> > location, like on some of the dating sites.  I have no clue where to
> > start, I''m not even sure what keywords I should use to
search.  If
> > anyone can point out to me how this is usually done, I would really
> > appreciate it.
>
> Start here:
>
> http://www.zipcodedownload.com/
>
> Get one of the packages that includes lat/long coordinates.  Then just do
> earth-distance calculations and you''re done.
>
> We use that to drive this:http://www.cardplayer.com/poker_room
>
> -philip
Thanks for the recommendation.  I was wondering if there are any free
ones available that don''t do as much.  I just need to let the user
select a city or zip/postal, and return a list of cities within say
50/100/200 miles.  There''s no need to be too specific.  I am just a
student writing this app from my bedroom, so I try not to spend too
much. :)

Thanks!

Bob


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On 5/10/07, bob <papersmith-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
>
>
>
>
> On May 10, 12:48 pm, Philip Hallstrom
<r...-SUcgGwS4C16SUMMaM/qcSw@public.gmane.org> wrote:
> > > Sorry that this topic is not really rails-specific, but I happen
to be
> > > implementing it in rails.  I''m trying to implement a
common scenario,
> > > where you get a comprehensive list of states/provinces, cities,
and
> > > zip/postal codes, and you find nearby cities based on a specified
> > > location, like on some of the dating sites.  I have no clue where
to
> > > start, I''m not even sure what keywords I should use to
search.  If
> > > anyone can point out to me how this is usually done, I would
really
> > > appreciate it.
> >
> > Start here:
> >
> > http://www.zipcodedownload.com/
> >
> > Get one of the packages that includes lat/long coordinates.  Then just
> do
> > earth-distance calculations and you''re done.
> >
> > We use that to drive this:http://www.cardplayer.com/poker_room
> >
> > -philip
>
> Thanks for the recommendation.  I was wondering if there are any free
> ones available that don''t do as much.  I just need to let the user
> select a city or zip/postal, and return a list of cities within say
> 50/100/200 miles.  There''s no need to be too specific.  I am just
a
> student writing this app from my bedroom, so I try not to spend too
> much. :)
>
> Thanks!
>
> Bob
>
> Purely out of curiosity, I decided to investigate this myself, and I found
http://www.cfdynamics.com/cfdynamics/zipbase/index.cfm . It''s free, and
has
lat/long coordinates and cities. It appears to be from 2001, but it may be
accurate enough for your needs.


doppler

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I haven''t looked into this at all, but does the Google Maps API have
any
calls that would return the exact same information?  If so, then just make a
call out to their service.

On 5/10/07, David Rose <doppler-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
>
> On 5/10/07, bob <papersmith-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> >
> >
> >
> >
> > On May 10, 12:48 pm, Philip Hallstrom
<r...-SUcgGwS4C16SUMMaM/qcSw@public.gmane.org> wrote:
> > > > Sorry that this topic is not really rails-specific, but I
happen to
> > be
> > > > implementing it in rails.  I''m trying to implement
a common
> > scenario,
> > > > where you get a comprehensive list of states/provinces,
cities, and
> > > > zip/postal codes, and you find nearby cities based on a
specified
> > > > location, like on some of the dating sites.  I have no clue
where to
> >
> > > > start, I''m not even sure what keywords I should use
to search.  If
> > > > anyone can point out to me how this is usually done, I would
really
> > > > appreciate it.
> > >
> > > Start here:
> > >
> > > http://www.zipcodedownload.com/
> > >
> > > Get one of the packages that includes lat/long coordinates.  Then
just
> > do
> > > earth-distance calculations and you''re done.
> > >
> > > We use that to drive this:http://www.cardplayer.com/poker_room
> > >
> > > -philip
> >
> > Thanks for the recommendation.  I was wondering if there are any free
> > ones available that don''t do as much.  I just need to let the
user
> > select a city or zip/postal, and return a list of cities within say
> > 50/100/200 miles.  There''s no need to be too specific.  I am
just a
> > student writing this app from my bedroom, so I try not to spend too
> > much. :)
> >
> > Thanks!
> >
> > Bob
> >
> > Purely out of curiosity, I decided to investigate this myself, and I
> found http://www.cfdynamics.com/cfdynamics/zipbase/index.cfm .
It''s free,
> and has lat/long coordinates and cities. It appears to be from 2001, but it
> may be accurate enough for your needs.
>
>
> doppler
> >
>

-- 
Terry (TAD) Donaghe
http://tadspot.tumblr.com

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Hello,

Check out YM4R/GM . I am using it for a website I just started 
coding(experimenting yet) www.catbrowse.com

Enter in the text field something like:  Arendsweg, netherlands
I list possible results if google maps API returns multiple locations 
(thanks to google and YM4R/GM)

If it returns only one address than I show it on google map. Something 
like Arendsweg, Alkmaar, Netherlands   (and then drag map to a little 
South West)

All I use is (query is user''s input)

  def find_locations(query)
    Geocoding.get(query, { :host => "catbrowse.com" })
  end


You should really check out the YM4R/GM, great plugin.

Gokhan Arli
www.sylow.net

-- 
Posted via http://www.ruby-forum.com/.

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I just run a quick query below and it finds the state for given zipcode.


$ ./script/console
Loading development environment.
>> Geocoding.get("30327")
=> [#<struct Ym4r::GmPlugin::Geocoding::Placemark address="GA 30327, 
USA", country_code="US", administrative_area="GA", 
sub_administrative_area="", locality="",
dependent_locality="",
thoroughfare="", postal_code="30327", longitude=-84.419966, 
latitude=33.862723, accuracy=5>]


Gokhan Arli
www.sylow.net


Philip Hallstrom wrote:
>> I haven''t looked into this at all, but does the Google Maps
API have any
>> calls that would return the exact same information?  If so, then just
make a
>> call out to their service.
> 
> Yes and no.  You can get the lat/long for a given address/city/zip, but
> you can''t do things like figure out the state given the zip, etc
which
> is
> what this guy wants to do...
> 
> Also, they have a limit on the number of queries/day, but if you can 
> cache
> it on insert that might work too.

-- 
Posted via http://www.ruby-forum.com/.

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> I haven''t looked into this at all, but does the Google Maps API
have any
> calls that would return the exact same information?  If so, then just make
a
> call out to their service.
Yes and no.  You can get the lat/long for a given address/city/zip, but 
you can''t do things like figure out the state given the zip, etc which
is
what this guy wants to do...

Also, they have a limit on the number of queries/day, but if you can cache 
it on insert that might work too.

>
> On 5/10/07, David Rose
<doppler-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>>
>> On 5/10/07, bob
<papersmith-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>>>
>>>
>>>
>>>
>>> On May 10, 12:48 pm, Philip Hallstrom
<r...-SUcgGwS4C16SUMMaM/qcSw@public.gmane.org> wrote:
>>>>> Sorry that this topic is not really rails-specific, but I
happen to
>>> be
>>>>> implementing it in rails.  I''m trying to implement
a common
>>> scenario,
>>>>> where you get a comprehensive list of states/provinces,
cities, and
>>>>> zip/postal codes, and you find nearby cities based on a
specified
>>>>> location, like on some of the dating sites.  I have no clue
where to
>>>
>>>>> start, I''m not even sure what keywords I should
use to search.  If
>>>>> anyone can point out to me how this is usually done, I
would really
>>>>> appreciate it.
>>>>
>>>> Start here:
>>>>
>>>> http://www.zipcodedownload.com/
>>>>
>>>> Get one of the packages that includes lat/long coordinates. 
Then just
>>> do
>>>> earth-distance calculations and you''re done.
>>>>
>>>> We use that to drive this:http://www.cardplayer.com/poker_room
>>>>
>>>> -philip
>>>
>>> Thanks for the recommendation.  I was wondering if there are any
free
>>> ones available that don''t do as much.  I just need to let
the user
>>> select a city or zip/postal, and return a list of cities within say
>>> 50/100/200 miles.  There''s no need to be too specific.  I
am just a
>>> student writing this app from my bedroom, so I try not to spend too
>>> much. :)
>>>
>>> Thanks!
>>>
>>> Bob
>>>
>>> Purely out of curiosity, I decided to investigate this myself, and
I
>> found http://www.cfdynamics.com/cfdynamics/zipbase/index.cfm .
It''s free,
>> and has lat/long coordinates and cities. It appears to be from 2001,
but it
>> may be accurate enough for your needs.
>>
>>
>> doppler
>>>
>>
>
>
> -- 
> Terry (TAD) Donaghe
> http://tadspot.tumblr.com
>
> >
>
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> I just run a quick query below and it finds the state for given zipcode.
Sweet! Guess I need to relook at it :)

>
>
> $ ./script/console
> Loading development environment.
>>> Geocoding.get("30327")
> => [#<struct Ym4r::GmPlugin::Geocoding::Placemark address="GA
30327,
> USA", country_code="US", administrative_area="GA",
> sub_administrative_area="", locality="",
dependent_locality="",
> thoroughfare="", postal_code="30327",
longitude=-84.419966,
> latitude=33.862723, accuracy=5>]
>
>
> Gokhan Arli
> www.sylow.net
>
>
> Philip Hallstrom wrote:
>>> I haven''t looked into this at all, but does the Google
Maps API have any
>>> calls that would return the exact same information?  If so, then
just make a
>>> call out to their service.
>>
>> Yes and no.  You can get the lat/long for a given address/city/zip, but
>> you can''t do things like figure out the state given the zip,
etc which
>> is
>> what this guy wants to do...
>>
>> Also, they have a limit on the number of queries/day, but if you can
>> cache
>> it on insert that might work too.
>
>
> -- 
> Posted via http://www.ruby-forum.com/.
>
> >
>
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Oh well, give it a few more years and cheaper connectivity and storage and
Google will provide an API for retrieving any information at all.

I guess if you want, you can already do a generic google search for
"85260."  The first thing retrieved is the name of the city.  So, you
could
probably screen scrape that.  I wonder if google watches for bots doing
stuff like that, or if they cap searches.

Heh... Idle minds...

On 5/10/07, Philip Hallstrom
<rails-SUcgGwS4C16SUMMaM/qcSw@public.gmane.org>
wrote:
>
>
> > I haven''t looked into this at all, but does the Google Maps
API have any
> > calls that would return the exact same information?  If so, then just
> make a
> > call out to their service.
>
> Yes and no.  You can get the lat/long for a given address/city/zip, but
> you can''t do things like figure out the state given the zip, etc
which is
> what this guy wants to do...
>
> Also, they have a limit on the number of queries/day, but if you can cache
> it on insert that might work too.
>
>
> >
> > On 5/10/07, David Rose
<doppler-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> >>
> >> On 5/10/07, bob
<papersmith-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> >>>
> >>>
> >>>
> >>>
> >>> On May 10, 12:48 pm, Philip Hallstrom
<r...-SUcgGwS4C16SUMMaM/qcSw@public.gmane.org> wrote:
> >>>>> Sorry that this topic is not really rails-specific,
but I happen to
> >>> be
> >>>>> implementing it in rails.  I''m trying to
implement a common
> >>> scenario,
> >>>>> where you get a comprehensive list of
states/provinces, cities, and
> >>>>> zip/postal codes, and you find nearby cities based on
a specified
> >>>>> location, like on some of the dating sites.  I have no
clue where to
> >>>
> >>>>> start, I''m not even sure what keywords I
should use to search.  If
> >>>>> anyone can point out to me how this is usually done, I
would really
> >>>>> appreciate it.
> >>>>
> >>>> Start here:
> >>>>
> >>>> http://www.zipcodedownload.com/
> >>>>
> >>>> Get one of the packages that includes lat/long
coordinates.  Then
> just
> >>> do
> >>>> earth-distance calculations and you''re done.
> >>>>
> >>>> We use that to drive
this:http://www.cardplayer.com/poker_room
> >>>>
> >>>> -philip
> >>>
> >>> Thanks for the recommendation.  I was wondering if there are
any free
> >>> ones available that don''t do as much.  I just need to
let the user
> >>> select a city or zip/postal, and return a list of cities
within say
> >>> 50/100/200 miles.  There''s no need to be too
specific.  I am just a
> >>> student writing this app from my bedroom, so I try not to
spend too
> >>> much. :)
> >>>
> >>> Thanks!
> >>>
> >>> Bob
> >>>
> >>> Purely out of curiosity, I decided to investigate this myself,
and I
> >> found http://www.cfdynamics.com/cfdynamics/zipbase/index.cfm .
It''s
> free,
> >> and has lat/long coordinates and cities. It appears to be from
2001,
> but it
> >> may be accurate enough for your needs.
> >>
> >>
> >> doppler
> >>>
> >>
> >
> >
> > --
> > Terry (TAD) Donaghe
> > http://tadspot.tumblr.com
> >
> > >
> >
>
> >
>

-- 
Terry (TAD) Donaghe
http://tadspot.tumblr.com

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http://zipcodesearch.rubyforge.org/

Problem solved.

On May 11, 12:53 am, "Terry Donaghe"
<terry.dona...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> Oh well, give it a few more years and cheaper connectivity and storage and
> Google will provide an API for retrieving any information at all.
>
> I guess if you want, you can already do a generic google search for
> "85260."  The first thing retrieved is the name of the city.  So,
you could
> probably screen scrape that.  I wonder if google watches for bots doing
> stuff like that, or if they cap searches.
>
> Heh... Idle minds...
>
> On 5/10/07, Philip Hallstrom
<r...-SUcgGwS4C16SUMMaM/qcSw@public.gmane.org> wrote:
>
>
>
>
>
> > > I haven''t looked into this at all, but does the Google
Maps API have any
> > > calls that would return the exact same information?  If so, then
just
> > make a
> > > call out to their service.
>
> > Yes and no.  You can get the lat/long for a given address/city/zip,
but
> > you can''t do things like figure out the state given the zip,
etc which is
> > what this guy wants to do...
>
> > Also, they have a limit on the number of queries/day, but if you can
cache
> > it on insert that might work too.
>
> > > On 5/10/07, David Rose
<dopp...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > >> On 5/10/07, bob
<papersm...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > >>> On May 10, 12:48 pm, Philip Hallstrom
<r...-SUcgGwS4C16SUMMaM/qcSw@public.gmane.org> wrote:
> > >>>>> Sorry that this topic is not really
rails-specific, but I happen to
> > >>> be
> > >>>>> implementing it in rails.  I''m trying to
implement a common
> > >>> scenario,
> > >>>>> where you get a comprehensive list of
states/provinces, cities, and
> > >>>>> zip/postal codes, and you find nearby cities
based on a specified
> > >>>>> location, like on some of the dating sites.  I
have no clue where to
>
> > >>>>> start, I''m not even sure what keywords I
should use to search.  If
> > >>>>> anyone can point out to me how this is usually
done, I would really
> > >>>>> appreciate it.
>
> > >>>> Start here:
>
> > >>>>http://www.zipcodedownload.com/
>
> > >>>> Get one of the packages that includes lat/long
coordinates.  Then
> > just
> > >>> do
> > >>>> earth-distance calculations and you''re done.
>
> > >>>> We use that to drive
this:http://www.cardplayer.com/poker_room
>
> > >>>> -philip
>
> > >>> Thanks for the recommendation.  I was wondering if there
are any free
> > >>> ones available that don''t do as much.  I just
need to let the user
> > >>> select a city or zip/postal, and return a list of cities
within say
> > >>> 50/100/200 miles.  There''s no need to be too
specific.  I am just a
> > >>> student writing this app from my bedroom, so I try not to
spend too
> > >>> much. :)
>
> > >>> Thanks!
>
> > >>> Bob
>
> > >>> Purely out of curiosity, I decided to investigate this
myself, and I
> > >> foundhttp://www.cfdynamics.com/cfdynamics/zipbase/index.cfm.
It''s
> > free,
> > >> and has lat/long coordinates and cities. It appears to be
from 2001,
> > but it
> > >> may be accurate enough for your needs.
>
> > >> doppler
>
> > > --
> > > Terry (TAD) Donaghe
> > >http://tadspot.tumblr.com
>
> --
> Terry (TAD) Donaghehttp://tadspot.tumblr.com

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Just gave a talk on this at our local ruby users group last night.
(ncl.rb).

Useful plugin is GeoKit ( http://geokit.rubyforge.org/  ) which allows
you to geocode addresses using a variety of sources (Google, Yahoo
etc) works great if you are in the US or Canada. For UK Codes it
becomes a problem due to copyright of the postcode database. I have
hacked together an extra geocoder ( http://magpieuk.blogspot.com )
which plugs in to GeoKit which utilises a server I found which offers
this for free ( http://emad.fano.us/blog/?p=277 ).

GeoKit gives you the acts_as_mappable which once you add lat and lng
fields to it allows you to do nice things such as:


object1.distance_to(object2)

origin = MultiGeocoder.geocode("NE1 4ST")

nearlocs =  Model.find(:all, :origin => origin, :order => "distance
ASC"

If you need to integrate with Google / Yahoo maps have a look at YM4R
( http://thepochisuperstarmegashow.com/projects/ )

Hope this helps

Regards

Lee


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