Besides the above, I recall Flickr (you know the photo-sharing site) being able to extract (kind of rough) polygons from exif-data of photos (containing lat/longs) . Since often these photo's are tagged by city they could extract city boundaries.
See this old posts I dug up quickly, I'm not sure if development is still active, etc. http://code.flickr.com/blog/2008/10/30/the-shape-of-alpha/ http://biodivertido.blogspot.com/2008/11/flickr-creating-polygons-out-of-points.html hth, Geert-Jan 2011/2/3 viraj <kali...@gmail.com> > thank you all for the links and notes. > > ~viraj > > On Thu, Feb 3, 2011 at 7:08 AM, Gavin Towey <gto...@ffn.com> wrote: > > Openstreetmap.org is as close as you'll get. I'd be surprised if they > have shapes for cities beyond just lat/lon point data, but they should have > shapes data for zips, counties, states and countries if I recall correctly. > > > > -----Original Message----- > > From: vegiv...@gmail.com [mailto:vegiv...@gmail.com] On Behalf Of Johan > De Meersman > > Sent: Wednesday, February 02, 2011 7:59 AM > > To: viraj > > Cc: mysql@lists.mysql.com > > Subject: Re: map polygon data for popular us cities > > > > On Wed, Feb 2, 2011 at 11:30 AM, viraj <kali...@gmail.com> wrote: > > > >> dear list, > >> where can i find a list of map polygons for united states cities? any > >> open database? or tool to obtain correct coordinates? > >> > > > > A bit offtopic here, but I suspect that most such databases will be > > proprietary and thus payable through the nose. Have a look at the > > OpenStreetMap project, I suspect their database might be accessible under > > some open license. > > > > -- > > Bier met grenadyn > > Is als mosterd by den wyn > > Sy die't drinkt, is eene kwezel > > Hy die't drinkt, is ras een ezel > > > > IMPORTANT: This email message is intended only for the use of the > individual to whom, or entity to which, it is addressed and may contain > information that is privileged, confidential and exempt from disclosure > under applicable law. If you are NOT the intended recipient, you are hereby > notified that any use, dissemination, distribution or copying of this > communication is strictly prohibited. If you have received this > communication in error, please reply to the sender immediately and > permanently delete this email. Thank you. > > > > -- > MySQL General Mailing List > For list archives: http://lists.mysql.com/mysql > To unsubscribe: http://lists.mysql.com/mysql?unsub=gbr...@gmail.com > >
