From: Bill Eisenhauer <bill@...>
Date: 2008-01-04T00:04:48+09:00
Subject: Re: spatial search & search radius circumference with Geokit

Xin Zheng wrote:
> Bill Eisenhauer wrote:
>> What would the API be?
>> 
> 
> Hi Bill,
> 
> Thanks for the quick reply. It's fantastic you guys are so responsive.
> 
> 
> The API could be:
> 
> data_with_location, radius_points = MappableModel.find(:all, :origin => 
> [lat, lng], :within => distance, :return_radius_points => true)
> 
> I think it will be good having an option in the find method. I am not 
> sure how the radius points should be returned, as returning it to two 
> vars is unconventional.
> 
> radius_points = [[lat,lng],[lat,lng],...]
> 
> FYI. I am using KML with Google Maps. KML wants the coordinates like 
> this:
> <coordinates>
>   -112.3372510731295,36.14888505105317,1784
>   -112.3356128688403,36.14781540589019,1784
>   -112.3368169371048,36.14658677734382,1784
>   -112.3384408457543,36.14762778914076,1784
>   -112.3372510731295,36.14888505105317,1784
> </coordinates>
> 
> Perhaps radius_points can be an object with helper method to_kml:
> radius_points.to_kml
> 
> What do you think?

I'm not sure I would put this under "find".  We will probably add it as 
method to our Mappable module which will get mixed into a model. 
However, it'll probably respond to some different type of method name to 
isolate it away from database semantics.

Let me get with Andre and see what can come up with.
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