Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
1995
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*November
*December
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 1995

[Date Index] [Thread Index] [Author Index]

Search the Archive

Spherical trig application

  • Subject: [mg2209] Spherical trig application
  • From: ui at uribe.demok.co.uk (Roger Uribe)
  • Date: Mon, 16 Oct 1995 15:53:36 GMT
  • Approved: usenet@wri.com
  • Distribution: local
  • Newsgroups: wri.mathgroup
  • Organization: Wolfram Research, Inc.
  • Sender: daemon at wri.com ( )

Given a roughly convex polygon on the Earth's surface - typically 1000
miles "diameter" and 3 - 12 vertices. I need to know whether a given
point is in it or not.  There are about 10,000+ such points to test so
I need an effecient method.

Any ideas, or know of any software that will do something like it.

I guess defining the enclosing circle and discarding any points
outside that would get rid of most of them.

I don't want a lesson in spherical trig, I'm no expert but I know
enough, it's the methods and short cuts I'm after.

Thanks  Roger.



  • Prev by Date: Re: Q: ROTATING ANIMATIONS in MMA?
  • Next by Date: Re: Re: Best Windows for Mma 2.2.2????
  • Previous by thread: Re: Making Mathematica Functions Evaluate Rapidly?
  • Next by thread: Spherical trig application