From: Joel VanderWerf <vjoel@...>
Date: 2008-06-24T06:12:02+09:00
Subject: Re: Reorder a XML file by distance from a location

Johnny Repp wrote:
> Hi
> 
> I'm quite the newbie and I'm looking for some help. I need to do
> something quick and it doesnt look so hard.
> 
> I have this RSS file on my computer (below) and I need to produce a very
> similar RSS file but with the items ordered according to the distance
> from a given location using the latitude and longitude. I'm trying to
> use rexml, but I can't really get anything good. I don't figure how
> sorting works.
> 
> Can someone give me some hints or advice?
> 
> ======
> <?xml version="1.0"?>
> <rss version="2.0">
>    <channel>
>       <title>something</title>
>       <description>myfeed</description>
> 
>       <item>
>          <title>somewhere</title>
>          <link>http://link</link>
>          <description>niceplace</description>
>         <geo:lat>45.6743546527171</geo:lat>
>          <geo:long>130.7628651374888</geo:long>
>       </item>
> 
> etc.
> 
>    </channel>
> </rss>
> ======

There's nothing to sort on until you compute distance. Start by googling 
for 'calculate distance from gps coordinates'.

-- 
       vjoel : Joel VanderWerf : path berkeley edu : 510 665 3407