sis-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Martin Desruisseaux (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SIS-418) Decompose netCDF keywords attribute value
Date Mon, 21 May 2018 09:17:00 GMT
Martin Desruisseaux created SIS-418:
---------------------------------------

             Summary: Decompose netCDF keywords attribute value
                 Key: SIS-418
                 URL: https://issues.apache.org/jira/browse/SIS-418
             Project: Spatial Information Systems
          Issue Type: Improvement
          Components: Storage
    Affects Versions: 0.8, 0.7, 0.6, 0.5, 0.4, 0.3
            Reporter: Martin Desruisseaux


The {{keywords}} attribute in netCDF files sometime contains a value like below:

{noformat}
:keywords = "EARTH SCIENCE > Oceans > Ocean Temperature > Sea Surface Temperature"
;
:keywords_vocabulary = "GCMD Science Keywords" ;
{noformat}

Currently, {{NetcdfMetadata}} store the whole string in a single ISO 19115 {{Keyword}} value,
while actually it should be many keywords. The GCMD keywords structure is described on the
NASA [Global Change Master Directory (GCMD) Keywords|https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords]
web page. It uses the following hierarchical structure:

{quote}Category > Topic > Term > Variable > Detailed Variable{quote}

We may interpret the structure as below:

* We support only {{"EARTH_SCIENCE"}} (other possible values are {{"CONTINENT"}}, {{"Earth
Remote Sensing Instruments"}}, _etc._)
* {{KeywordType.DISCIPLINE}} (note: would be wrong if above was {{"CONTINENT"}} for example).
* {{KeywordType.THEME}} (note: would be {{KeywordType.INSTRUMENT}} instead if above was _"Earth
Remote Sensing Instruments"_ instead than _"Earth Science"_).
* {{KeywordType.SUB_TOPIC_CATEGORY}}

We may also provide a {{KeywordClass}} with a reference to GCMD as an ontology.




--
This message was sent by Atlassian JIRA
(v7.6.3#76005)

Mime
View raw message