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Re: Wrapping image on polar projection [message #87823 is a reply to message #87767]

Thu, 27 February 2014 09:57

Vinay
Messages: 3
Registered: February 2014

Junior Member

On Wednesday, February 26, 2014 11:58:46 AM UTC-9, Vinay wrote:
> Hi folks,
>
>
>
>
>
> Was anyone out there successful in wrapping images on polar projection using 'cg' routines. Most of the other examples essentially uses cgCoutour. OK here is where, I got stuck.
>
>
>
> My data is similar to the example given in
>
> http://www.idlcoyote.com/map_tips/warptomap.php
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>
>
>
>
> ------My code---------------------------
>
> Filein = 'test1.sav'
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> RESTORE, Filein
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> Help, image, lats, lons
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>
>
> S = Size(image)
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> lat = Rebin(lats, s(1), s(2))
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> lon = Rebin(lons, s(1), s(2))
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> image1 = Bytscl(image,min = 0.0, max = 0.15,/NaN )
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>
>
> cgDisplay, Title='Polar Projection'
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>
>
> map = Obj_New('cgMap', 'Polar Stereographic', LIMIT=[60, -180, 90, 180], Center_Lat=90, Center_Lon=180, POSITION=[0.05, 0.05, 0.95, 0.95])
>
>
>
> warped = cgWarpToMap(Image1, lon, lat, MAP=map, MISSING=0, Resolution=[400, 300], /SetRange)
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> cgImage, warped, Position=[0.1, 0.1, 0.9, 0.9]
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> cgMap_Grid, Map=map, /Label, Color='Blue'
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> cgMap_Continents, MAP=map, Color='Blue'
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> cgMap_Continents, MAP=map, Color='Blue', /Countries
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> ------------------------------------
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> It will be great, if anyone has any suggestions!!
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> Thanks,
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>
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> Vinay

So true, the data is low-resolution and limits the ability to get good results. Yes, the gridded methods 'works' fine with quite acceptable results. Thankyou for your time.

Cheers!!

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[Message index]

		Wrapping image on polar projection By: Vinay on Wed, 26 February 2014 12:58
		Re: Wrapping image on polar projection By: David Fanning on Wed, 26 February 2014 13:10
		Re: Wrapping image on polar projection By: Vinay on Wed, 26 February 2014 13:23
		Re: Wrapping image on polar projection By: David Fanning on Wed, 26 February 2014 13:30
		Re: Wrapping image on polar projection By: David Fanning on Wed, 26 February 2014 13:33
		Re: Wrapping image on polar projection By: David Fanning on Thu, 27 February 2014 05:26
		Re: Wrapping image on polar projection By: Vinay on Thu, 27 February 2014 09:57

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