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Re: Find all points within a set of polygons [message #46638 is a reply to message #46637]

Wed, 30 November 2005 07:43

Maarten[1]
Messages: 176
Registered: November 2005

Senior Member

Thanks for the reply, that got rid of at least one loop. Funny how IDL
ends up doing things differently all the time: the sample C-code I
found denounces the angle method as horribly slow, and generally
recommends to use the number of border crossings on a half-line to
infinity (what I wrote above).

How I missed that file while searching your site I don't know, perhaps
adding a "Search Terms" field to the function header is a good idea (in
general this seems to classify as a "Point location" type of problem).

I'll report back when I've found a clever way of doing this for a lot
of boxes at once.
Maarten

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[Message index]

		Re: Find all points within a set of polygons By: JD Smith on Wed, 30 November 2005 12:45
		Re: Find all points within a set of polygons By: Maarten[1] on Wed, 30 November 2005 08:03
		Re: Find all points within a set of polygons By: David Fanning on Wed, 30 November 2005 07:51
		Re: Find all points within a set of polygons By: Maarten[1] on Wed, 30 November 2005 07:43
		Re: Find all points within a set of polygons By: David Fanning on Wed, 30 November 2005 07:23
		Re: Find all points within a set of polygons By: Maarten[1] on Thu, 08 December 2005 07:53

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