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Re: Point inside/outside a polygon?
Dennis Boccippio writes:
> Does anyone know of IDL routines for determination of whether a point
> datum is inside/outside a closed irregular polygon? I'm told that some
> variants of this functionality are available in Matlab and Mathematica,
> was curious if anyone had implemented a solution for IDL. My usual
> kludge to this is polyfill/mask-based, which is probably a very
> inefficient approach...
Here is an article that describes one approach:
I am using the INSIDE program described there to
determine if a contour line is internal or external to
another contour line in a current application
I am building for a client and it works beautifully.
David Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438 E-Mail: email@example.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155