Author Topic: Searching by mapping coordinates - longitude and latitude (Read 2380 times)

petednz · March 27, 2008, 12:59:51 pm

Any suggestions for how we can put in a series of geocodes (longitude and latitude) that would define a polygon (ie a space) and search for the contacts within that space?

Donald Lobo · March 27, 2008, 01:15:50 pm

1. hire someone who is good at geo math and coordinate geometry

2. check out the drupal location module: http://drupal.org/project/location (which is currently in transition). I think there is some code in there which you could potentially reuse to get answers for "gimme all the contacts who live in a 5 km radius from these coordinates (its a circle, so its just a radial distance check which is a wee bit easier that a polygon check

3. Take the above code and create a custom search.

4. Post back the code on the forum for us to read and admire

lobo

petednz · March 28, 2008, 09:22:32 pm

Yep - doing my best to identify OS solutions that require minimal tinkering - found http://www.zonums.com/gmaps/digipoint.html which basically seems to do what i am looking for in terms of being able to grab the coordinates that define the polygon (though it doesn't draw the lines) and output a csv or kml file.
Now just have to see how much messing it takes to query civi in terms of coordinates which fit within the defined area.

Donald Lobo · March 28, 2008, 09:58:12 pm

this seems a bit interesting, so i did some search to see the potential solutions for this. here are a few useful links i found:

lobo

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Author Topic: Searching by mapping coordinates - longitude and latitude (Read 2380 times)

petednz

Searching by mapping coordinates - longitude and latitude

Donald Lobo

Re: Searching by mapping coordinates - longitude and latitude

petednz

Re: Searching by mapping coordinates - longitude and latitude

Donald Lobo

Re: Searching by mapping coordinates - longitude and latitude