documentation from ncml to iso ted habermann, noaa nesdis ngdc
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Documentation from NcML to ISOTed Habermann, NOAA NESDIS NGDC
Layers of Access
HDF5 Data
HDF & NetCDF Library
Climate Forecast, Attribute Conventions
for Data Discovery
MatLab, IDL, IDV, Ferret, GMT
OPeNDAP
Geospatial Database
SQL
Community Data Models,Open GIS Specifications
ArcMap, ArcIMS,WMS, WFS, WCS
GML, KML, SimpleFeatures
HDF/netCDF GIS
Conventions
Discovery
Use / Mashup
Understanding
Climate-Forecast (CF) ConventionsStandard variable names and data organizations
Unidata Attribute Convention for Data Discovery
ISO Conventions
ISO Conventions
Containers
THREDDS Catalog
NcML In the file or the catalog
netCDF in the file
Purpose
Documentation Completeness
COMPLETNESS Use UnderstandingDiscovery
ClimateForecast ACDD ISO
NcML
19139
ncISO ncISO?
DocumentationRepositoryISO 19115,
19115-2, 19119 and extensions
THREDDS
HDF, netCDF, ACDD, CF
DIF, FGDC,Data.Gov
SensorML
WCS, WMS, WFS, SOS
KML
Open Provenance
Model, PROV
Documentation in Multiple Dialects
Although CF is specifically a netCDF standard, we feel that most of the ideas areof wider application. The metadata objects could be contained in file formats other than netCDF. Conversion of the metadata between files of different formats will be facilitated if conventions for all formats are based on similar ideas.
Spiral 1:Initial Content
Metadata ContentIndependent of standard
StandardGuidance /
Implementation
Check BackWith Users
Spiral 2-N: Scientific QuestionsNew RequirementsNew Use Cases
Check BackWith Data Collectors/
Providers
Spiral Development / Training
IdentificationIdTitleAbstractResource DateTopic CategoryTheme KeywordMetadata ContactScience Contact
ExtentGeospatial Bounding BoxTemporal Start/EndVertical Min/MaxPlace Keywords
DistributionDistributor ContactOnline ResourceDistribution FormatData Center KeywordsBrowse Graphic
Text SearchesPurposeExtent DescriptionLineage StatementProject Keywords
Quality/LineageSourcesProcess StepsQuality Reports / Coverages
Acquisition InformationInstrumentPlatformInstrument KeywordsPlatform Keywords
Content InformationAttribute TypeAttribute NamesAttribute DefinitionsAttribute Units
Discovery Understanding
ConnectionOnlineResource:Linkage (URL)NameDescriptionFunction
Spiral Development / Training: Potential Spirals
Climate-Forecasttitle
THREDDSdataset@idkeywordkeyword/@vocabularycreator/namecreator/contact@emailcreator/namedate/@type="created, issued, modified"]
ISOfileIdentifiertitleabstractresource date(s)topicCategorytheme keywordmetadata contactscience contact
Data Discoverynaming_authority:idtitlecreator_namecreator_emailcreator_urldate_createdinstitutionsummarykeywordskeywords_vocabulary
Identification and DiscoveryAs metadata are shared between national and international repositories it is becoming important to unambiguously identify specific records. This required an identifier in the metadata. Some mechanism must exist for ensuring that these identifiers are unique. This is accomplished by specifying the naming authority or namespace for the identifier.
Climate-Forecast THREDDS ISOOnlineResource:Linkage (URL)NameDescriptionFunction
Data Discovery
Connection
Climate-Forecastgeospatial_lat_mingeospatial_lat_maxgeospatial_lon_mingeospatial_lon_maxgeospatial_vertical_mingeospatial_vertical_maxtime_coverage_starttime_coverage_end
THREDDSgeospatialCoverage/northsouth/startgeospatialCoverage/northsouth/sizegeospatialCoverage/eastwest/startgeospatialCoverage/eastwest/sizetimeCoverage/starttimeCoverage/endgeospatialCoverage/updown/startgeospatialCoverage/updown/size
ISOGeospatial Bounding BoxTemporal Start/EndVertical Min/MaxPlace Keywords / Geographic Identifiers
Data Discoverygeospatial_lat_mingeospatial_lat_maxgeospatial_lon_mingeospatial_lon_maxgeospatial_vertical_mingeospatial_vertical_maxtime_coverage_starttime_coverage_end
Extent
This basic extent information supports spatial/temporal searches that are increasingly important as the number of map based search interfaces increases. Many of the attributes included in this spiral can be calculated from the data if the file is compliant with the NetCDF Climate and Forecast (CF) Metadata Convention.
Climate-Forecastgeospatial_lat_units &resgeospatial_lon_units & resgeospatial_vertical_units & restime_coverage_units & res
THREDDSgeospatialCoverage/northsouth/units &resgeospatialCoverage/eastwest/units &resgeospatialCoverage/updown/units &res
ISOData Discoverygeospatial_lat_units &resgeospatial_lon_units &resgeospatial_vertical_units &restime_coverage_durationtime_coverage_resolution
Other Extent
Climate-Forecast THREDDS/metadata/publisher/name/metadata/publisher/contact/@email/metadata/publisher/contact/@urlService URLs
ISODistributor ContactOnline ResourceDistribution FormatData Center KeywordsBrowse Graphic
Data Discoverypublisher_namepublisher_emailpublisher_url
Distribution
Climate-Forecastcommentreferences
THREDDSmetadata/documentationmetadata/projectmetadata/documentation[@type="funding"]
ISOPurposeExtent DescriptionLineage StatementProject Keywords
Data Discoverycontributorcontributor_roleacknowledgementproject
Text Searches
Text searches are a very important mechanism for data discovery. This group includes attributes that contain descriptive text that could be the target of these searches. Some of these attributes, for example title and summary, might also be displayed in the results of text searches.
Climate-Forecastsource
THREDDS ISOInstrumentPlatformInstrument KeywordsPlatform Keywords
Data Discovery
Acquisition Information
Climate-Forecastsourcehistoryflag_masksflag_valuesflag_meaningsancillary_variables
THREDDS ISOSourcesProcess StepsQuality Reports / CoveragesQuality Flags
Data Discovery
Quality Information
Climate-Forecastlong_namestandard_namestandard_name_vocabularyscale_factoradd_offsetvalid_min, max, rangeunits
THREDDSmetadata/variables@vocabulary
ISOAttribute TypeAttribute NamesAttribute DefinitionsAttribute Units
Data Discoverycdm_data_type
Content Information
Spiral Development / Training: Rubrics
THREDDS Data ServerMultiple Dialects:
THREDDS Catalog
file1.nc file2.nc file3.nc file4.nc file1.nc file.ncfile.nc file.ncfile2.nc file.nc
THREDDS Catalog
THREDDS Catalog
Extract Data
OPeNDAP WMS WCS
Extract Metadata (NcISO)
NcML ISO Rubric
THREDDS Metadata Server
THREDDS Metadata Server
Documentation in Three Dialects
ISO ACDDNcML
https://geo-ide.noaa.gov/wiki/index.php?title=NcISOhttp://groups.google.com/
group/ncisometadata
DocumentationRepositoryISO 19115,
19115-2, 19119 and extensions
THREDDS
HDF, netCDF, ACDD, CF
DIF, FGDC,Data.Gov
SensorML
WCS, WMS, WFS, SOS
KML
Open Provenance
Model, PROV
Documentation in Multiple Dialects
1010101010101010101111100100101101001001001001000100100010010101001001010010010101000100100010100100100101010101010101010101010100010010101000010100
Metadata
Where Are Citations?
XML
dataset /resource
source
keywordthesaurus
& ontology
evaluationprocedure
standardspecification
algorithm featurecatalog
applicationschema
alternatemetadata
metadata& servicestandard
associatedresource
name/metadata
additionaldocumentation
constraintsreference
sourcemetadata
processreference &
documentation
softwarereference
featurecatalog
formatspecification
Documentation
Questions?
ted.habermann@noaa.gov
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