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Re: Point within country boundary [message #87365 is a reply to message #87359]

Tue, 28 January 2014 08:08

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Fabien writes:

> I think you are aware that they are not doing the same thing.
> ComputeMask things "pixels", containPoints thinks "(grid) points".

Now that I think about it, another way of making a pixel mask, with just
the country boundaries, might be something like this.

cgDisplay, 720, 360
cgErase, 'black'
cgMap_Set, /Cylindrical, Position=[0,0,1,1], /NoBorder, /NoErase
file = Filepath(SubDir=['resource','maps','shape'], "country.shp")
usa = cgExtractShape(file, 'CNTRY_NAME', 'UNITED STATES')
cgDraw_ROI, usa, Color='white'
mask = TVRD() NE 0

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thue. ("Perhaps thou speakest truth.")

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[Message index]

		Point within country boundary By: Matt[3] on Fri, 24 January 2014 10:48
		Re: Point within country boundary By: David Fanning on Fri, 24 January 2014 11:08
		Re: Point within country boundary By: Phillip Bitzer on Fri, 24 January 2014 11:43
		Re: Point within country boundary By: David Fanning on Fri, 24 January 2014 12:06
		Re: Point within country boundary By: Phillip Bitzer on Fri, 24 January 2014 13:22
		Re: Point within country boundary By: David Fanning on Fri, 24 January 2014 13:36
		Re: Point within country boundary By: Fabzi on Sat, 25 January 2014 04:54
		Re: Point within country boundary By: David Fanning on Sat, 25 January 2014 05:36
		Re: Point within country boundary By: Fabzi on Sat, 25 January 2014 06:14
		Re: Point within country boundary By: Matt[3] on Tue, 28 January 2014 03:35
		Re: Point within country boundary By: Fabzi on Tue, 28 January 2014 05:01
		Re: Point within country boundary By: Fabzi on Tue, 28 January 2014 07:05
		Re: Point within country boundary By: David Fanning on Tue, 28 January 2014 07:15
		Re: Point within country boundary By: David Fanning on Tue, 28 January 2014 07:20
		Re: Point within country boundary By: David Fanning on Tue, 28 January 2014 08:08
		Re: Point within country boundary By: iqbalhabibie0684 on Wed, 22 February 2017 01:18
		Re: Point within country boundary By: Helder Marchetto on Wed, 22 February 2017 01:41

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