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Re: GeoTiff- grid [message #58270 is a reply to message #58167]

Tue, 22 January 2008 15:01

robinson.inj
Messages: 32
Registered: August 2007

Member

On Jan 22, 4:47 pm, David Fanning <n...@dfanning.com> wrote:
> robinson....@gmail.com writes:
>> David, I followed your examples but still have problems. In the uv
>> space my corners IDL and ENVI aggred
>> UpperLeftCoordinate:(-167346.0185E, 3677892.5566N)
>> LowerRightCoordinate:(1222128.8184E,2983386.7945N)
>> My image has 3000 col x 1500 lin. The pix resolution is 463.3127
>> meters.
>
> I get an image resolution of 2999 x 1499 when I take
> the corner coordinates, subtract them, and divide
> by the pixel resolution. The fact that ENVI and IDL
> agree is a good thing, but in all of the GeoTIFF
> files I've been working, with doing this arithmetic
> gives me the image size exactly. So, that concerns
> me.
>
>> However in the lon/lat space i got:
>> IDL: UpperLeftCoordinate: (-98.555279E, 45.411655N)
>> LowerRightCoordinate: ( -81.568627E,51.346972N)
>> ENVI: UpperLeftCoordinate: (-98.09914722E, 33.30501389N)
>> LowerRightCoordinate:(-84.82142500E, 27.55810278N)
>
> Unless you are using the *completely* wrong map projection
> (how did you determine what this is?), then it looks to me
> like you didn't convert the corners you thought you were
> converting.
>
> But I would like to see the listgeo output to know
> what I am dealing with here.
>
> Cheers,
>
> David
> --
> David Fanning, Ph.D.
> Fanning Software Consulting, Inc.
> Coyote's Guide to IDL Programming (www.dfanning.com)
> Sepore ma de ni thui. ("Perhaps thou speakest truth.")

I posted the listgeo list above.

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[Message index]

		GeoTiff- grid By: robinson.inj on Mon, 21 January 2008 13:59
		Re: GeoTiff- grid By: David Fanning on Wed, 23 January 2008 11:00
		Re: GeoTiff- grid By: robinson.inj on Wed, 23 January 2008 23:35
		Re: GeoTiff- grid By: robinson.inj on Wed, 23 January 2008 10:52
		Re: GeoTiff- grid By: David Fanning on Wed, 23 January 2008 07:49
		Re: GeoTiff- grid By: David Fanning on Wed, 23 January 2008 07:29
		Re: GeoTiff- grid By: robinson.inj on Wed, 23 January 2008 07:15
		Re: GeoTiff- grid By: robinson.inj on Wed, 23 January 2008 05:08
		Re: GeoTiff- grid By: David Fanning on Tue, 22 January 2008 15:31
		Re: GeoTiff- grid By: David Fanning on Tue, 22 January 2008 15:17
		Re: GeoTiff- grid By: robinson.inj on Tue, 22 January 2008 15:01
		Re: GeoTiff- grid By: David Fanning on Thu, 24 January 2008 06:48
		Re: GeoTiff- grid By: robinson.inj on Thu, 24 January 2008 06:29
		Re: GeoTiff- grid By: David Fanning on Thu, 24 January 2008 05:40

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