Re: [thredds] Using the NC4 String type for a variable containing a "cf_role" attribute

• To: thredds@xxxxxxxxxxxxxxxx
• Subject: Re: [thredds] Using the NC4 String type for a variable containing a "cf_role" attribute
• From: John Caron <caron@xxxxxxxxxxxxxxxx>
• Date: Mon, 16 Dec 2013 07:52:32 -0700

On 12/12/2013 1:27 PM, Kyle Wilcox wrote:

I have two files where the only difference is the variable type of the "feature_type_instance" variable.

When using a Char array, it works just fine.
When using a String, NCJ fails to find a StructureRecord:

java.lang.IllegalStateException: Cant find Structure record

  at ucar.nc2.ft.point.standard.Table$TableStructure.<init>(Table.java:253)

    at ucar.nc2.ft.point.standard.Table.factory(Table.java:110)

  at ucar.nc2.ft.point.standard.NestedTable.<init>(NestedTable.java:98)   at ucar.nc2.ft.point.standard.TableAnalyzer.analyze(TableAnalyzer.java:406)   at ucar.nc2.ft.point.standard.TableAnalyzer.factory(TableAnalyzer.java:294)   at ucar.nc2.ft.point.standard.PointDatasetStandardFactory.isMine(PointDatasetStandardFactory.java:114)   at ucar.nc2.ft.FeatureDatasetFactoryManager.wrap(FeatureDatasetFactoryManager.java:272)   at ucar.nc2.ft.FeatureDatasetFactoryManager.open(FeatureDatasetFactoryManager.java:243)

You can try loading each file into the FeatureTypes/PointFeature tab to see the stacktrace from the String file (I've attached them).

Based on CF docs (http://cf-pcmdi.llnl.gov/documents/cf-conventions/1.6/cf-conventions.html#coordinates-metadata) it states:

"The variable carrying the cf_role attribute may have any data type."


Is this a bug in NCJ?

Thanks,
Kyle


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Hi Kyle:

John

• Follow-Ups:
  • Re: [thredds] Using the NC4 String type for a variable containing a "cf_role" attribute
    • From: Signell, Richard

• References:
  • [thredds] Using the NC4 String type for a variable containing a "cf_role" attribute
    • From: Kyle Wilcox