Message-ID: <XFMail.050310181023.Ted.Harding@nessie.mcc.ac.uk>
Date: 2005-03-10T18:10:23Z
From: (Ted Harding)
Subject: from long/lat to UTM
In-Reply-To: <s230213d.017@lp-msg1.co.ihc.com>
On 10-Mar-05 Greg Snow wrote:
> [...]
> I found a shapefile of time zones at:
> http://openmap.bbn.com/data/shape/timezone/
>
> A google search on the keywords timezone & shapefile finds a
> few other possibilities.
>
>>> b) a function which, for each name in the list, returns
>>> the TZ name
>
> The "maptools" package can read in the above shapefile and
> convert it to a list of polygons and the "sgeostat" has an
> "in.polygon" function to see if a point is in a given polygon.
>
> The following code worked for me:
> [....]
Many thanks, Greg. That looks just the job, and I'll look
into it.
All best wishes,
Ted.
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Date: 10-Mar-05 Time: 18:10:23
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