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https://issues.apache.org/jira/browse/SIS-495?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Martin Desruisseaux closed SIS-495.
-----------------------------------
> Resampling trims one pixel when transform is identity and interpolation is
> nearest
> ----------------------------------------------------------------------------------
>
> Key: SIS-495
> URL: https://issues.apache.org/jira/browse/SIS-495
> Project: Spatial Information Systems
> Issue Type: Bug
> Components: Referencing
> Reporter: Johann Sorel
> Assignee: Martin Desruisseaux
> Priority: Major
> Fix For: 1.1
>
>
> The new resample removes the right most pixel when transform is identity and
> interpolation is set to nearest.
>
> Test case :
> {code:java}
> /**
> * Tests resample with an identity transform and a coverage extent change.
> *
> * @throws TransformException if some coordinates can not be transformed
> to the target grid geometry.
> */
> @Test
> @Ignore
> public void testExtentIdentity() throws TransformException {
> final CoordinateReferenceSystem crs =
> CommonCRS.WGS84.normalizedGeographic();
> final BufferedImage image = new BufferedImage(2, 2,
> BufferedImage.TYPE_BYTE_GRAY);
> final WritablePixelIterator ite = WritablePixelIterator.create(image);
> for (int x = 0; x < 2; x++) {
> for (int y = 0; y < 2; y++) {
> ite.moveTo(x, y);
> ite.setSample(0, 10);
> }
> }
> final AffineTransform2D gridToCrs = new AffineTransform2D(1, 0, 0,
> -1, 0, 0);
> final GridCoverageBuilder gcb = new GridCoverageBuilder();
> gcb.setValues(image);
> gcb.setDomain(new GridGeometry(null, CELL_CENTER, gridToCrs, crs));
> final GridCoverage coverage = gcb.build();
> GridGeometry targetGrid = new GridGeometry(new GridExtent(4, 4),
> CELL_CENTER, gridToCrs, crs);
> final GridCoverage target = resample(coverage, targetGrid);
> Raster data = target.render(null).getData();
> Assert.assertEquals(10, data.getSample(0, 0, 0));
> Assert.assertEquals(10, data.getSample(1, 0, 0));
> Assert.assertEquals( 0, data.getSample(2, 0, 0));
> Assert.assertEquals( 0, data.getSample(3, 0, 0));
> Assert.assertEquals(10, data.getSample(0, 1, 0));
> Assert.assertEquals(10, data.getSample(1, 1, 0));
> Assert.assertEquals( 0, data.getSample(2, 1, 0));
> Assert.assertEquals( 0, data.getSample(3, 1, 0));
> Assert.assertEquals( 0, data.getSample(0, 2, 0));
> Assert.assertEquals( 0, data.getSample(1, 2, 0));
> Assert.assertEquals( 0, data.getSample(2, 2, 0));
> Assert.assertEquals( 0, data.getSample(3, 2, 0));
> }{code}
>
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