Martin, I printed the bounding box and the gridToCRS. There is a difference about a half of a original pixels width/height. That's because the gridToCRS takes the pixel center, isn't it? Or this the problem?
I tried to divide the pixels into 16 pieces and I get the following: 1 2 3 4 5 6 7 8 9 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 2 2 2 2 3 3 3 0 0 1 1 1 2 2 2 2 3 3 3 0 0 1 1 1 2 2 2 2 3 3 3 0 0 4 4 4 5 5 5 5 6 6 6 0 0 4 4 4 5 5 5 5 6 6 6 0 0 4 4 4 5 5 5 5 6 6 6 0 0 4 4 4 5 5 5 5 6 6 6 0 0 7 7 7 8 8 8 8 9 9 9 0 0 7 7 7 8 8 8 8 9 9 9 0 0 7 7 7 8 8 8 8 9 9 9 The grid is shifted about one pixel down, and to the right as well (quarter of an original pixel). Furthermore the same "range" (half of the original pixel width/height) becomes 0, as in the first resampling test. When I divide the pixels into nine pieces, the grid is shiftet about one pixel (third of an original pixel). 0 0 0 0 0 0 0 0 0 0 1 1 1 2 2 2 3 3 0 1 1 1 2 2 2 3 3 0 1 1 1 2 2 2 3 3 0 4 4 4 5 5 5 6 6 0 4 4 4 5 5 5 6 6 0 4 4 4 5 5 5 6 6 0 7 7 7 8 8 8 9 9 0 7 7 7 8 8 8 9 9 Strange behaviour... Christian Am 14.08.2008 um 11:39 schrieb Martin Desruisseaux: > 0 is probably taken as "no data value". The "real world" > coordinates of the first row and first column are probably slightly > outside the "real world" bounding box of the original raster (you > may prints their bounding box for testing this hypothesis, as well > as the "gridToCRS" transform). If this is the case, I don't know > why the Resample operation computed a bounding box slightly outside > the original bounding box. We would need to open a JIRA task with a > test case to track this issue. > > Martin ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Geotools-gt2-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
