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Point within country boundary [message #87319]

Fri, 24 January 2014 10:48

Matt[3]
Messages: 23
Registered: April 2011

Junior Member

Hi All,

I'm trying to find out which countries a set of points fall within. I thought I could do this using the supplied map shapefiles and IDLanROI. However, when I try this:

country_path = "/usr/local/exelis/idl/resource/maps/shape/country.shp"

oSHP = OBJ_NEW('IDLffShape', country_path )
ent1 = oSHP -> GetEntity( 34, /ATTRIBUTES ) ;USA
OBJ_DESTROY, oSHP

oROI = OBJ_NEW('IDLanROI', (*ent1.vertices))
test = oROI -> ContainsPoints([-100.], [35.])
OBJ_DESTROY, oROI

print, test

... I get 0, whereas I'm pretty sure -100E, 35W should be within the USA.

Am I misunderstanding how these objects or shape files should be used?

Thanks in advance for any pointers,

Matt

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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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