comp.lang.idl-pvwave archive: archive

Home » Public Forums » archive » Shape to raster

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Shape to raster [message #78139]

Wed, 26 October 2011 09:52

Fabzou
Messages: 76
Registered: November 2010

Member

Dear IDLers,

My apologies if this question has been posted before.

I have a polygon vector file from which I know the coordinates within a
grid (subpixel precision) and I would like to make a mask from this
information (within the polygon = 1, outside = 0).

The only idea I have to make this would be to use the polyfill command
and use the produced image as a mask. This would be easy to do, but I am
worried about the precision I would reach by doing so (I am concerned
about the line thickness, for example, and all the things that make of
POLYFILL and DRAW_ROI a plot routine and not a "shape to raster" routine).

Maybe there is an IDL equivalent to the ENVI "Build mask from a ROI" tool?

Thanks for your help!

Fabz

Report message to a moderator

[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

Previous Topic:	Re: unable to set time attribute for netCDF in IDL
Next Topic:	Re: wind fields on map

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Fri Nov 28 13:35:35 PST 2025

Total time taken to generate the page: 0.00228 seconds