[gdal-dev] gdalwarp - Clip raster using mask

[Joaquim Luis]

Alisson,

It's not so easy to follow what is "desired" and "not-desired". For an 
excellent discussion of the details involved in such operations see

http://blogs.mathworks.com/steve/2006/12/22/poly2mask-and-roipoly-part-3/

As a solution for your 'wish-behavior'  case maybe what you can do is to 
previously expand your polygon with a buffer of half cell width.

Joaquim

> Hi friends,
>
> By using gdalwarp to clip a raster with a mask (shape), I get a new 
> raster of smaller size, which is the boundary of the polygon shape 
> (mask). However, the pixels do not pass the polygon. I would like to 
> pass the pixels just a little of the polygon mask.
>
> For clarity, I send two pictures of what I desire and not desire:
> http://postimage.org/image/hlrc3911z/
> http://postimage.org/image/4vn3q5t3r/
>
> The used command is: gdalwarp -dstnodata 0 -q -cutline 
> C:/Users/Hugo/Final.shp -crop_to_cutline -of GTiff 
> C:/Users/Hugo/Elevation-DEM-CLIPPED.img 
> C:/Users/Hugo/Elevation-DEM-CLIPPED.img
>
> Can you help me?
>
> Best Regards,
> -- 
> Alisson Barbosa
> Systems Analyst - FUNCEME
> M.Sc. in Computer Science - MACC
> Graduate in Computer Science  - UECE
>
>
>
>
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