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On Tue, Jun 7, 2016 at 4:24 PM, kweiss01@anonymised.com <kweiss01@anonymised.com40…> wrote:
Hey all,
I think I stumbled across a bug in the time & elevation dimension handling of the NetCDF-out extension. Our source data contains elevations in Pascals and so we configured the elevation dimension accordingly under the “Dimensions” tab. When I execute a DescribeCoverage request for the coverage, the Elevation domain is correctly labled with uom=“Pa”. However, when I execute a getCoverage request, the response data defines the elevation units as “m”. Looking through the source code I think the bug may be caused by something as trivial as the capitalization (or lack thereof) used for the enabledDimensions key in org.geoserver.wcs2_0.response.WCSDimensionsSubsetHelper.java. The “setupDimensions()” method calls “setupDimensionBean()” for both time & elevation dimensions using all caps. As I step through the code in the debugger, my enabledDimensions map contains both “time” and “elevation” as lower case keys. The result is that the dimension is not retrieved from the map of enabledDimensions and the “fallback” case is hit which uses default values for unit type and symbol.
I have tried modifying the coverage.xml to use capital names for time & elevation dimensions, but this causes GeoServer to ignore the dimensions altogether. Am I configuring my GeoServer incorrectly or is this an actual bug?
We should take a look on this but I think it’s a bug.
Could you open a JIRA for this?
I wonder if the code should use the org.geoserver.catalog.ResourceInfo IDs instead. If you are familiar with the code and you would like to test that suggestion you can also consider setting up a PullRequest with the fix if it works.
Also, and this is a slightly unrelated question, is there a way to provide additional attributes to a dimensions output?
At the moment this is not supported.
Only global attributes addition is supported in the NetCDF Output tab.
There, you can also deal with CF compliant variable names for which long_name and standard_name attributes are populated. However they refers to data variables, not dimensions.
Hope this helps.
Cheers,
Daniele
As stated before, my source data contains elevation info in Pascals. I would like to output the following attributes under my elevation dimensions if possible:
positive = “down”
long_name = “Isobaric surface”
standard_name = “air_pressure”
Thanks,
Kevin M. Weiss
Software Engineer
CRITICAL NETWORKS / HARRIS CORPORATION
harris.com / kevin.weiss@anonymised.com0…
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