Channel 9 Forums - Coffeehouse - Get city & country for latitude and longitude http://mschnlnine.vo.llnwd.net/d1/Dev/App_Themes/C9/images/feedimage.png Channel 9 Forums - Coffeehouse - Get city & country for latitude and longitude http://channel9.msdn.com/Forums Channel 9 keeps you up to date with the latest news and behind the scenes info from Microsoft that developers love to keep up with. From LINQ to SilverLight – Watch videos and hear about all the cool technologies coming and the people behind them. http://channel9.msdn.com/Forums en Wed, 22 May 2013 06:33:17 GMT Wed, 22 May 2013 06:33:17 GMT Rev9 11 -11 -1 Coffeehouse - Get city & country for latitude and longitude Can anybody recommend either a Web Service or an offline database solution which would allow me to get the city and country for any given latitude and longitude?

(Free solutions/services preferred but possible commercial solutions are welcome, too!)

-Ralf

]]> http://channel9.msdn.com/Forums/Coffeehouse/426208-Get-city--country-for-latitude-and-longitude/426208#426208 Sun, 07 Sep 2008 09:58:00 GMT http://channel9.msdn.com/Forums/Coffeehouse/426208-Get-city--country-for-latitude-and-longitude/426208#426208 Ralf Rottmann 11 http://channel9.msdn.com/Niners/BeSharp/Discussions/RSS Coffeehouse - Get city & country for latitude and longitude http://channel9.msdn.com/forums/TechOff/258037-Databases-Storing-locations-and-finding-nearby-locations/

]]> http://channel9.msdn.com/Forums/Coffeehouse/426208-Get-city--country-for-latitude-and-longitude/4847bfccf5fd47899afa9deb013af3f8#4847bfccf5fd47899afa9deb013af3f8 Sun, 07 Sep 2008 12:30:05 GMT http://channel9.msdn.com/Forums/Coffeehouse/426208-Get-city--country-for-latitude-and-longitude/4847bfccf5fd47899afa9deb013af3f8#4847bfccf5fd47899afa9deb013af3f8 ZippyV 11 http://channel9.msdn.com/Niners/ZippyV/Discussions/RSS Coffeehouse - Get city & country for latitude and longitude
ZippyV said:

http://channel9.msdn.com/forums/TechOff/258037-Databases-Storing-locations-and-finding-nearby-locations/

Thanks ZippyV,

I did the search on C9 myself, however, that discussion thread does unfortunately NOT answer the question I've posted here.

I'll repeat for the sake of being clear:

I know many services (Yahoo Maps API, etc.) that allow you to get Latitude and Longitude information when you send an address as the input. I do need it the other way around.

All I want to send as INPUT parameter ist Latitude and Longitude and as a return result I'd need city and country.

Any hints?

]]> http://channel9.msdn.com/Forums/Coffeehouse/426208-Get-city--country-for-latitude-and-longitude/04d36c6600e142d7b67f9deb013af42b#04d36c6600e142d7b67f9deb013af42b Sun, 07 Sep 2008 12:53:45 GMT http://channel9.msdn.com/Forums/Coffeehouse/426208-Get-city--country-for-latitude-and-longitude/04d36c6600e142d7b67f9deb013af42b#04d36c6600e142d7b67f9deb013af42b Ralf Rottmann 11 http://channel9.msdn.com/Niners/BeSharp/Discussions/RSS Coffeehouse - Get city & country for latitude and longitude
BeSharp said:
ZippyV said:
*snip*
Thanks ZippyV,

I did the search on C9 myself, however, that discussion thread does unfortunately NOT answer the question I've posted here.

I'll repeat for the sake of being clear:

I know many services (Yahoo Maps API, etc.) that allow you to get Latitude and Longitude information when you send an address as the input. I do need it the other way around.

All I want to send as INPUT parameter ist Latitude and Longitude and as a return result I'd need city and country.

Any hints?
With that topic I did find a list but it didn't end up on Channel 9.

But I found it back:
http://earth-info.nga.mil/gns/html/namefiles.htm

]]> http://channel9.msdn.com/Forums/Coffeehouse/426208-Get-city--country-for-latitude-and-longitude/aa6484bb8ad8488c84af9deb013af45f#aa6484bb8ad8488c84af9deb013af45f Sun, 07 Sep 2008 12:56:20 GMT http://channel9.msdn.com/Forums/Coffeehouse/426208-Get-city--country-for-latitude-and-longitude/aa6484bb8ad8488c84af9deb013af45f#aa6484bb8ad8488c84af9deb013af45f ZippyV 11 http://channel9.msdn.com/Niners/ZippyV/Discussions/RSS Coffeehouse - Get city & country for latitude and longitude
ZippyV said:
BeSharp said:
*snip*
With that topic I did find a list but it didn't end up on Channel 9.

But I found it back:
http://earth-info.nga.mil/gns/html/namefiles.htm
Wow! With the data files made available there I might be able to set up my own web service to convert stuff! Great hint! Thanks!

]]> http://channel9.msdn.com/Forums/Coffeehouse/426208-Get-city--country-for-latitude-and-longitude/fbf897c3d1724733ac089deb013af48f#fbf897c3d1724733ac089deb013af48f Sun, 07 Sep 2008 13:08:43 GMT http://channel9.msdn.com/Forums/Coffeehouse/426208-Get-city--country-for-latitude-and-longitude/fbf897c3d1724733ac089deb013af48f#fbf897c3d1724733ac089deb013af48f Ralf Rottmann 11 http://channel9.msdn.com/Niners/BeSharp/Discussions/RSS Coffeehouse - Get city & country for latitude and longitude
BeSharp said:
ZippyV said:
*snip*
Wow! With the data files made available there I might be able to set up my own web service to convert stuff! Great hint! Thanks!
Don't be too euphoric, the lists are not clean and contain other things like mountains, rivers, lakes. It's almost impossible to get a clean list of only cities and villages based on filtering the other columns.

]]> http://channel9.msdn.com/Forums/Coffeehouse/426208-Get-city--country-for-latitude-and-longitude/0df4c960650f430ba2189deb013af4c0#0df4c960650f430ba2189deb013af4c0 Sun, 07 Sep 2008 13:21:20 GMT http://channel9.msdn.com/Forums/Coffeehouse/426208-Get-city--country-for-latitude-and-longitude/0df4c960650f430ba2189deb013af4c0#0df4c960650f430ba2189deb013af4c0 ZippyV 11 http://channel9.msdn.com/Niners/ZippyV/Discussions/RSS Coffeehouse - Get city & country for latitude and longitude
ZippyV said:
BeSharp said:
*snip*
Don't be too euphoric, the lists are not clean and contain other things like mountains, rivers, lakes. It's almost impossible to get a clean list of only cities and villages based on filtering the other columns.
Well, I only need to get a city from lat and long. I really wonder that none of the map providers (Google, Yahoo, MS) seem to have a web service for that. All of them offer you to input an address and get lat/long back but not vice versa...

]]> http://channel9.msdn.com/Forums/Coffeehouse/426208-Get-city--country-for-latitude-and-longitude/de45a91ca314433289b69deb013af4f2#de45a91ca314433289b69deb013af4f2 Sun, 07 Sep 2008 13:25:56 GMT http://channel9.msdn.com/Forums/Coffeehouse/426208-Get-city--country-for-latitude-and-longitude/de45a91ca314433289b69deb013af4f2#de45a91ca314433289b69deb013af4f2 Ralf Rottmann 11 http://channel9.msdn.com/Niners/BeSharp/Discussions/RSS Coffeehouse - Get city & country for latitude and longitude
BeSharp said:
ZippyV said:
*snip*
Well, I only need to get a city from lat and long. I really wonder that none of the map providers (Google, Yahoo, MS) seem to have a web service for that. All of them offer you to input an address and get lat/long back but not vice versa...

one interesting thing:

http://maps.google.com/maps?ll=27.950739,-82.459259  will give you a map of tampa, fl

when dealing with locations your database would need to have it updated often as names and countries do chnage.

another issue is how you determine the "city" from LL
LL math to find the distance between two locations can get a bit complex,  as I recall it's called the Great Circle formla as it takes the cuve of the earth into account.

given a point and a distance you may get multiple location names, if several have non-zero distance and are very close which one do you pick?

]]> http://channel9.msdn.com/Forums/Coffeehouse/426208-Get-city--country-for-latitude-and-longitude/6f79b07f6330437180569deb013af528#6f79b07f6330437180569deb013af528 Sun, 07 Sep 2008 13:59:45 GMT http://channel9.msdn.com/Forums/Coffeehouse/426208-Get-city--country-for-latitude-and-longitude/6f79b07f6330437180569deb013af528#6f79b07f6330437180569deb013af528 figuerres 11 http://channel9.msdn.com/Niners/figuerres/Discussions/RSS Coffeehouse - Get city & country for latitude and longitude That activity is called reverse geocoding . Do a google search and you can find loads of free choices. It is possible to do it with the map point web service as demonstrated here
http://virtualearth.spaces.live.com/blog/cns!2BBC66E99FDCDB98!536.entry?wa=wsignin1.0

]]> http://channel9.msdn.com/Forums/Coffeehouse/426208-Get-city--country-for-latitude-and-longitude/26a7e6e2722648f8b4ac9deb013af575#26a7e6e2722648f8b4ac9deb013af575 Sun, 07 Sep 2008 18:04:29 GMT http://channel9.msdn.com/Forums/Coffeehouse/426208-Get-city--country-for-latitude-and-longitude/26a7e6e2722648f8b4ac9deb013af575#26a7e6e2722648f8b4ac9deb013af575 andokai 11 http://channel9.msdn.com/Niners/andokai/Discussions/RSS Coffeehouse - Get city & country for latitude and longitude Yes, Virtual Earth provides a reverse geocoding service in the platform API.

You can see this in our Interactive SDK, http://dev.live.com/virtualearth/sdk expand "Find Information (Basic)", then click on "Reverse Find"

MSDN Library for this, http://msdn.microsoft.com/en-us/library/cc469978.aspx

You'll have the parse the output if you just want city/state but that's pretty trivial.

Enjoy.

]]> http://channel9.msdn.com/Forums/Coffeehouse/426208-Get-city--country-for-latitude-and-longitude/9d6132858156471990989deb013af5a8#9d6132858156471990989deb013af5a8 Mon, 08 Sep 2008 00:07:13 GMT http://channel9.msdn.com/Forums/Coffeehouse/426208-Get-city--country-for-latitude-and-longitude/9d6132858156471990989deb013af5a8#9d6132858156471990989deb013af5a8 Mark Brown 11 http://channel9.msdn.com/Niners/Mark Brown/Discussions/RSS Coffeehouse - Get city & country for latitude and longitude If you just want the list, Check the World Wide Telescope. It has the long list of cities with lat & long which again might be based on Virtual Earth only.

]]> http://channel9.msdn.com/Forums/Coffeehouse/426208-Get-city--country-for-latitude-and-longitude/4d36929094d54d23a3c89deb013af5d9#4d36929094d54d23a3c89deb013af5d9 Mon, 08 Sep 2008 01:03:24 GMT http://channel9.msdn.com/Forums/Coffeehouse/426208-Get-city--country-for-latitude-and-longitude/4d36929094d54d23a3c89deb013af5d9#4d36929094d54d23a3c89deb013af5d9 Niner 11 http://channel9.msdn.com/Niners/Niner/Discussions/RSS