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Re: cgDrawVectors over map problem? [message #89690 is a reply to message #89620]

Sun, 16 November 2014 23:20

Dave[4]
Messages: 38
Registered: December 2007

Member

在 2014年11月2日星期日UTC+8上午8时54分05秒，Dave写道：
> Hi David:
>
> I want to use cgDrawVectors to draw wind over map, like this:
>
> mapNorth = Obj_New('cgMap', 'Polar Stereographic', Limit=[0, -180, 90, 180], /NoBorder)
> mapNorth -> Draw
>
> cgMap_Continents, Color='black', map_structure=mapNorth
> cgMap_Grid, LatDel=15, LonDel=15, LineStyle=1, Color='charcoal', /label, lonlabel=2, map_structure=mapNorth
>
> cgDrawVectors, 10, 0, 140, 40, vecColors='black', /Overplot, referencevector=10, /solid, thick=2, MapCoord=mapNorth
>
> In this example, the wind (u=10,v=0) should blow towards east. But the plotted wind blow towards right.
>
> That's to say, the wind direction does not fellow the map projection. So why. Very thanks!
>
> Dave

Hi david:
Another question. Now cgvector work fine with cgmap object, but not with cgmapset. Very thanks!
Dave

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[Message index]

		cgDrawVectors over map problem? By: Dave[4] on Sat, 01 November 2014 17:54
		Re: cgDrawVectors over map problem? By: David Fanning on Sun, 02 November 2014 09:23
		Re: cgDrawVectors over map problem? By: Dave[4] on Sun, 02 November 2014 16:10
		Re: cgDrawVectors over map problem? By: Dave[4] on Sun, 16 November 2014 23:20
		Re: cgDrawVectors over map problem? By: David Fanning on Mon, 17 November 2014 05:24
		Re: cgDrawVectors over map problem? By: Dave[4] on Mon, 17 November 2014 17:20
		Re: cgDrawVectors over map problem? By: David Fanning on Mon, 17 November 2014 17:37

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