SPHDIST: Stata module to compute spherical distances

Bill Rising ()

Statistical Software Components from Boston College Department of Economics

Abstract: sphdist.ado does the spherical distance calculations. deg2rad.ado converts one to three variables expressing the degrees minutes and seconds of arc. The radius may be specified as a number, but if omitted defaults to the proper radius for the earth in whatever units you like to use. Either radians or degrees may be used, though degrees is the measure of choice. The latitude and longitude are fed to the ado file through the lat1() lon1() lat2() and lon2() options (which can be either numbers or variables or a mixture. If they are variables, each may have 1 to 3 variables for degrees minutes, and seconds of arc). This is version 1.1 of the software.

Language: Stata
Requires: Stata version 6.0
Keywords: spherical coordinates; geographic data (search for similar items in EconPapers)
Date: Written 1999-03-19
Note: This module may be installed from within Stata by typing "ssc install sphdist". Windows users should not attempt to download these files with a web browser.

Downloads: (external link)
http://fmwww.bc.edu/repec/bocode/s/sphdist.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/s/sphdist.hlp help file (text/plain)
http://fmwww.bc.edu/repec/bocode/d/deg2rad.ado program code (text/plain)

Related works:
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http://repec.org/docs/ssc.php

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