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Re: Shape to raster [message #78174 is a reply to message #78139]

Mon, 31 October 2011 09:09

ben.bighair
Messages: 221
Registered: April 2007

Senior Member

Hi,

On Oct 31, 10:54 am, David Fanning <n...@dfanning.com> wrote:
> Fabzou writes:
>> I have an other question though. How will the IDLanROI object
>> "understand" the XY coordinates [0.5,0.5]? In my conception, these
>> coordinates correspond to the center of the first down left pixel, but
>> my first tests tend to show that this may not be the case...
>
> Oh, my gosh! I just spent a week worrying about this
> in conjunction with an update of my Active Contouring
> software! I don't use an IDLanROI object there, because
> I want to do this myself and completely understand what
> I am doing. In *my* ROI, the [0.5,0.5] location would
> indeed be the center of the first pixel. I don't know
> off-hand what the IDLanROI object will do.

I think the PIXEL_CENTER keyword is going to provide you with control
over this issue.

http://idlastro.gsfc.nasa.gov/idl_html_help/IDLanROIComputeM ask.html#wp1003888

Cheers,
Ben

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[Message index]

		Shape to raster By: Fabzou on Wed, 26 October 2011 09:52
		Re: Shape to raster By: Fabzou on Mon, 31 October 2011 09:17
		Re: Shape to raster By: ben.bighair on Mon, 31 October 2011 09:09
		Re: Shape to raster By: Fabzou on Mon, 31 October 2011 09:07
		Re: Shape to raster By: David Fanning on Mon, 31 October 2011 07:54

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