Martin, Usually it is enough to have just one extra pixel around the source pixel while warping. But for the events like this case, we have the option to set it.
On Tue, Mar 20, 2012 at 1:07 AM, Martin Chapman <[email protected]> wrote: > Chaitanya,**** > > ** ** > > Thank you very much for your response. The problem seems to be with the > default SOURCE_EXTRA parameter of the GDALWarpOptions being defaulted to > 1. When I up that number everything works fine. I think the default for > that value should be larger. What do you think?**** > > ** ** > > Best regards,**** > > Marty**** > > ** ** > > *From:* Chaitanya kumar CH [mailto:[email protected]] > *Sent:* Monday, March 19, 2012 1:00 PM > *To:* Martin Chapman > *Cc:* [email protected] > *Subject:* Re: [gdal-dev] GdalWarp issue**** > > ** ** > > Martin, > > Change the resampling method and/or change the SAMPLE_STEPS warp option.** > ** > > On Tue, Mar 20, 2012 at 12:12 AM, Martin Chapman <[email protected]> > wrote:**** > > All,**** > > **** > > Please see the attached sub-region screen capture of an image I created > using gdalwarp 1.9. I used MS Paint to highlight in red several columns of > pixels that repeat a pattern from left to right across the image > (vertically only) where the pixels are the same color for both pixel > columns when in fact they should be different. The problem seems to occur > whether I am going from source wkt (wgs84 in this case) to the same coord > system or if I go from wgs84 to another coord system. It only seems to > happen when the source image is in WGS84 though.**** > > **** > > Any help is much appreciated.**** > > **** > > Best regards,**** > > Martin**** > > **** > > **** > > > _______________________________________________ > gdal-dev mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/gdal-dev**** > > > > > -- > Best regards, > Chaitanya kumar CH. > > +91-9494447584 > 17.2416N 80.1426E**** > -- Best regards, Chaitanya kumar CH. +91-9494447584 17.2416N 80.1426E
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