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Re: CGMAP_GSHHS: problem with land/water colors [message #85523 is a reply to message #85522]

Wed, 14 August 2013 13:33

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

David Fanning writes:

> I think I would have
> used cgMap_Continents instead, and used the GSHHS data for just the
> inland waterways, if I needed that much detail. In other words, I think
> this is a wrong tool for the job kind of problem. (Unless, of course,
> you have a coffee machine nearby and you don't really care now long it
> all takes.)

Here is how I would have written this code. It works with either of your
two map limits.

PRO test_gshhs

datafile='C:\IDL\data\gshhs\gshhs_2.2\gshhs\gshhs_i.b'

; include some water
map_limits = [29.,-95.,34.,-88]
; land only
;map_limits = [31.,-95.,34.,-88]

cgDisplay, 500, 350, /free
pos = [0.1,0.1, 0.9, 0.8]

; set map projection
cgmap_set, limit = map_limits, /mercator, position=pos

cgColorFill, Position=pos, Color='tg5'
cgMap_Continents, color='tan', /continents, /fill

; issue CGMAP_GSHHS
cgMap_GSHHS, datafile, Fill=1, Level=2, Color='black', $
Water_color='blu4'

; overdraw state borders
cgMap_Continents, /usa, color='yellow'

cgPolygon, Position=pos, Color='black'
END

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]

		CGMAP_GSHHS: problem with land/water colors By: Matteo on Wed, 14 August 2013 12:08
		Re: CGMAP_GSHHS: problem with land/water colors By: David Fanning on Wed, 14 August 2013 12:15
		Re: CGMAP_GSHHS: problem with land/water colors By: David Fanning on Wed, 14 August 2013 12:38
		Re: CGMAP_GSHHS: problem with land/water colors By: David Fanning on Wed, 14 August 2013 13:08
		Re: CGMAP_GSHHS: problem with land/water colors By: David Fanning on Wed, 14 August 2013 13:33
		Re: CGMAP_GSHHS: problem with land/water colors By: Matteo on Wed, 14 August 2013 14:57
		Re: CGMAP_GSHHS: problem with land/water colors By: David Fanning on Wed, 14 August 2013 15:41

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