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Re: using IDLnetURL to get an image from a HTTP URL into IDL [message #91504 is a reply to message #91494]

Tue, 21 July 2015 14:20

Michael Galloy
Messages: 1114
Registered: April 2006

Senior Member

On 7/21/15 4:37 AM, Puneeth Shankar wrote:
> Hi Mike,
> Would you happen to know how to grab corner lat longs from a geotiff image?
> Currently, I'm able to get just one such point from the tiff structure "MODELTIEPOINTTAG".
> Ex: print,tiff_tags.MODELTIEPOINTTAG
> 0.00000000 0.00000000 0.00000000 -82.399429 41.402946 0.00000000
>
> These lat-longs are essential for google static maps to draw a bounding box over the 250x250 map headlessly.
>
> Regards,
> Puneeth
>

Checkout this page:

http://www.remotesensing.org/geotiff/spec/geotiff2.6.html

If you only have a single tie point, I think it is indicating that it is
a simple affine transformation. Use the ModelPixelScaleTag to determine
the other corner.

--
Michael Galloy
www.michaelgalloy.com
Modern IDL: A Guide to IDL Programming (http://modernidl.idldev.com)

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[Message index]

		using IDLnetURL to get an image from a HTTP URL into IDL By: Puneeth Shankar on Mon, 06 July 2015 01:01
		Re: using IDLnetURL to get an image from a HTTP URL into IDL By: Helder Marchetto on Mon, 06 July 2015 01:27
		Re: using IDLnetURL to get an image from a HTTP URL into IDL By: Puneeth Shankar on Mon, 06 July 2015 12:19
		Re: using IDLnetURL to get an image from a HTTP URL into IDL By: Michael Galloy on Mon, 06 July 2015 14:53
		Re: using IDLnetURL to get an image from a HTTP URL into IDL By: Puneeth Shankar on Tue, 07 July 2015 02:49
		Re: using IDLnetURL to get an image from a HTTP URL into IDL By: Helder Marchetto on Tue, 07 July 2015 03:08
		Re: using IDLnetURL to get an image from a HTTP URL into IDL By: Michael Galloy on Tue, 07 July 2015 09:33
		Re: using IDLnetURL to get an image from a HTTP URL into IDL By: Puneeth Shankar on Tue, 07 July 2015 22:47
		Re: using IDLnetURL to get an image from a HTTP URL into IDL By: Helder Marchetto on Wed, 08 July 2015 00:37
		Re: using IDLnetURL to get an image from a HTTP URL into IDL By: Puneeth Shankar on Wed, 08 July 2015 11:21
		Re: using IDLnetURL to get an image from a HTTP URL into IDL By: Puneeth Shankar on Tue, 21 July 2015 03:37
		Re: using IDLnetURL to get an image from a HTTP URL into IDL By: Michael Galloy on Tue, 21 July 2015 14:20
		Re: using IDLnetURL to get an image from a HTTP URL into IDL By: Puneeth Shankar on Wed, 22 July 2015 11:29
		Re: using IDLnetURL to get an image from a HTTP URL into IDL By: lakshmi prasanna on Tue, 08 September 2015 22:59
		Re: using IDLnetURL to get an image from a HTTP URL into IDL By: Craig Markwardt on Mon, 06 July 2015 17:43

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