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Re: st: Identify Neighbor Regions with Latitudes and Longitudes
From
Brendan Halpin <[email protected]>
To
[email protected]
Subject
Re: st: Identify Neighbor Regions with Latitudes and Longitudes
Date
Sun, 23 Sep 2012 10:50:29 +0100
On Sat, Sep 22 2012, ��wrote:
> Is it possible to identify all neighboring cities, NOT the nearest
> cities with just latitudes and longitudes?
You need to convert lat/lon pairs to distances: there is an interesting
summary of the various ways of doing this at
http://www.movable-type.co.uk/scripts/latlong.html. What is referred to
there as the equirectangular projection is probably accurate enough.
But first you need to make a data-set of city-pairs. That seems to be a
job for the -joinby- command.
Brendan
--
Brendan Halpin, Department of Sociology, University of Limerick, Ireland
Tel: w +353-61-213147 f +353-61-202569 h +353-61-338562; Room F1-009 x 3147
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