[Geoserver-devel] [jira] Created: (GEOS-1215) Returned coverage dimensions do not always match those requested

Returned coverage dimensions do not always match those requested
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                 Key: GEOS-1215
                 URL: http://jira.codehaus.org/browse/GEOS-1215
             Project: GeoServer
          Issue Type: Bug
          Components: WCS
    Affects Versions: 1.5.1
            Reporter: Edward Nash
            Assignee: Andrea Aime
             Fix For: 1.5.2
         Attachments: 2003.zip, CoverageTest.java, kamp_umriss.zip

I'm running into problems with GeoServer 1.5.1 WCS returning coverages (GeoTIFFs) with different dimensions (1 pixel larger in both width and height) to what I request. I assume that the problem is creeping in somewhere in the crop/resample/transform chain.

When I send the request

http://www.preagro.de/geoserver/wcs?SERVICE=WCS&VERSION=1.0.0&REQUEST=GetCoverage&COVERAGE=preagro:2003&CRS=EPSG:31468&RESPONSE_CRS=EPSG:31468&BBOX=4428336.3286009,5800831.4255015,4428985.3286009,5801314.9255015&WIDTH=260&HEIGHT=194&FORMAT=GEOTIFF

The result I get has the following GridGeometry (261 x 195 pixels and not 260 x 194 as requested):

GridGeometry2D[GeneralGridRange[0..261, 0..195], PARAM_MT["Affine",
  PARAMETER["num_row", 3],
  PARAMETER["num_col", 3],
  PARAMETER["elt_0_0", 2.4961538461547246],
  PARAMETER["elt_0_2", 4428337.576677823],
  PARAMETER["elt_1_1", -2.49226804123475],
  PARAMETER["elt_1_2", 5801313.67936748]]]

Attached is a quickly-hacked-together test case that demonstrates the problem, and shows that the problem seems to be dependent on the source data since the other coverage being tested for comparison (kamp_umriss) gets the correct grid geometry. Also attached is the source data (coverages kamp_umriss and 2003, ARCGRID) which are used in the test case.

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