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Re: Shape to raster [message #78180 is a reply to message #78117]

Mon, 31 October 2011 07:18

Fabzou
Messages: 76
Registered: November 2010

Member

Hi again,

On 10/27/2011 02:30 PM, David Fanning wrote:
> Fabzou writes:
>> But, as far as I understand the documentation, it only stores one
>> entity. So, if I have many entities (often the case in my shapefiles), I
>> have to instance many IDLanROI objects, generate a mask for all of them
>> and then combine the masks together? Or did I miss something again?
>
> No, you can do all this with one IDLanROI object. Simply
> use the MASK_IN keyword to the Compute_Mask method to
> pass in and modify the mask from previous polygons.

I ended up using IDLanROIgroup. It crashes (fatal error!) when there are
too many entities (thousands of them) but this was just for a test and
everything works fine in "normal" cases.

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...

Thanks!

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[Message index]

		Re: Shape to raster By: MarioIncandenza on Thu, 27 October 2011 09:55
		Re: Shape to raster By: David Fanning on Thu, 27 October 2011 05:30
		Re: Shape to raster By: Fabzou on Thu, 27 October 2011 02:40
		Re: Shape to raster By: David Fanning on Wed, 26 October 2011 10:02
		Re: Shape to raster By: Fabzou on Mon, 31 October 2011 07:18

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