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| From | Brendan Halpin <brendan.halpin@ul.ie> |
| To | statalist@hsphsun2.harvard.edu |
| 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 mailto:brendan.halpin@ul.ie ULSociology on Facebook: http://on.fb.me/fjIK9t http://teaching.sociology.ul.ie/bhalpin/wordpress twitter:@ULSociology * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/