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  1. GeoServer
  2. GEOS-8057

Requesting images stored in EPSG:4326 in EPSG:3857 pixelates the image

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: High
    • Resolution: Fixed
    • Affects versions: 2.10.1
    • Fix versions: 2.10.4, 2.11.2
    • Components: None
    • Labels:
      None
    • Environment:

      Data stored in EPSG:4326 in PostGIS datastore
      GeoServer version 2.10.1
      GeoTools version 16.1

      Description

      I have images that cross the dateline, so I store the data in EPSG:4326 in my datastore.

      Under my GeoServer WMS settings I have Enable advanced projection handling and Enable continuous map wrapping turned on.

      When I request the imagery in EPSG:4326, the stored projection, images look good. But when I request the imagery in EPSG:3857, the images all look pixelated.

      This happens to all images, even the ones that do not cross the dateline.

      To summarize:
      Problem is that requesting images stored in EPSG:4326 with EPSG:3857 projection with advanced projection handling ruins the image resolution.

        Attachments

        1. accretion_out.tif
          8.65 MB
        2. epsg_3857.jpg
          38 kB
        3. epsg_4326.jpg
          33 kB
        4. gs-2.12-3857.png
          51 kB
        5. PASS_RS2_270663_1_21565_1.tif
          780 kB

          Issue links

          is blocked by

          Bug - A problem which impairs or prevents the functions of the product. GEOT-5735 ReadResolutionCalculator under-estimates the reading resolution in case one axis is stretched a lot more than the other

          • Medium - Has the potential to affect progress.
          • Resolved

            Activity

              People

              • Assignee:
                aaime Andrea Aime
                Reporter:
                rcho Richard Cho
              • Votes:
                1 Vote for this issue
                Watchers:
                4 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: