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Re: Wrapping image on polar projection [message #87769 is a reply to message #87768]

Wed, 26 February 2014 13:23

Vinay
Messages: 3
Registered: February 2014

Junior Member

On Wednesday, February 26, 2014 12:10:38 PM UTC-9, David Fanning wrote:
> Vinay writes:
>
>
>
>> 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
>
>>
>
>>
>
>> ------My code---------------------------
>
>> Filein = 'test1.sav'
>
>> RESTORE, Filein
>
>> Help, image, lats, lons
>
>>
>
>> S = Size(image)
>
>> lat = Rebin(lats, s(1), s(2))
>
>> lon = Rebin(lons, s(1), s(2))
>
>> image1 = Bytscl(image,min = 0.0, max = 0.15,/NaN )
>
>>
>
>> cgDisplay, Title='Polar Projection'
>
>>
>
>> 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)
>
>> cgImage, warped, Position=[0.1, 0.1, 0.9, 0.9]
>
>> cgMap_Grid, Map=map, /Label, Color='Blue'
>
>> cgMap_Continents, MAP=map, Color='Blue'
>
>> cgMap_Continents, MAP=map, Color='Blue', /Countries
>
>> ------------------------------------
>
>>
>
>> It will be great, if anyone has any suggestions!!
>
>
>
> Have you read this article:
>
>
>
> http://www.idlcoyote.com/code_tips/usegriddata.html
>
>
>
> 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.")

Hi David,

Yes, I know there are other ways to achieve this by using Map_set, Map_Patch, Map_Proj_Init ...etc. I was particularly, interested in using cgWarpToMap and was giving it a try !!!

Thanks,

Vinay

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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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