Geographic bounding box of a data file
This example prints the metadata of a netCDF file in the XML format defined by the ISO 19115-3 international standard. The coverage values are not read, only the netCDF file header is read.
Direct dependencies
| Maven coordinates | Module info | Remarks |
|---|---|---|
org.apache.sis.storage:sis-netcdf |
org.apache.sis.storage.netcdf |
|
edu.ucar:cdm-core |
For netCDF-4 or HDF5 |
The cdm-core dependency can be omitted for netCDF-3 (a.k.a. “classic”),
GeoTIFF or any other formats supported by Apache SIS.
For the dependencies required for reading GeoTIFF instead of netCDF files,
see the geographic bounding box code example.
Code example
The file name in following code need to be updated for yours data.
import java.util.Map;
import java.io.File;
import java.io.StringWriter;
import javax.xml.bind.JAXBException;
import javax.xml.transform.stream.StreamResult;
import org.opengis.metadata.Metadata;
import org.apache.sis.storage.DataStore;
import org.apache.sis.storage.DataStores;
import org.apache.sis.storage.DataStoreException;
import org.apache.sis.xml.XML;
public class ExportMetadata {
/**
* Demo entry point.
*
* @param args ignored.
* @throws DataStoreException if an error occurred while reading the data file.
* @throws JAXBException if an error occurred while marshalling metadata to XML.
*/
public static void main(String[] args) throws DataStoreException, JAXBException {
try (DataStore store = DataStores.open(new File("CMEMS.nc"))) {
Metadata metadata = store.getMetadata();
System.out.println(XML.marshal(metadata));
/*
* By default the XML schema is the most recent version of the standard supported
* by Apache SIS. But the legacy version published in 2007 is still in wide use.
* The legacy version can be requested with the `METADATA_VERSION` property.
*/
Map<String,String> config = Map.of(XML.METADATA_VERSION, "2007");
StringWriter result = new StringWriter();
XML.marshal(metadata, new StreamResult(result), config);
// Result is in `result.toString()`.
}
}
}Output
The output depends on the data and the locale. Below is an example:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<mdb:MD_Metadata xmlns:cit="http://standards.iso.org/iso/19115/-3/cit/1.0"
xmlns:gco="http://standards.iso.org/iso/19115/-3/gco/1.0"
xmlns:mcc="http://standards.iso.org/iso/19115/-3/mcc/1.0"
xmlns:mdb="http://standards.iso.org/iso/19115/-3/mdb/1.0"
xmlns:mrc="http://standards.iso.org/iso/19115/-3/mrc/1.0"
xmlns:mrd="http://standards.iso.org/iso/19115/-3/mrd/1.0"
xmlns:mri="http://standards.iso.org/iso/19115/-3/mri/1.0"
xmlns:mrl="http://standards.iso.org/iso/19115/-3/mrl/1.0"
xmlns:mrs="http://standards.iso.org/iso/19115/-3/mrs/1.0"
xmlns:msr="http://standards.iso.org/iso/19115/-3/msr/1.0">
<mdb:metadataStandard>
<!-- Omitted for brevity -->
</mdb:metadataStandard>
<mdb:spatialRepresentationInfo>
<msr:MD_GridSpatialRepresentation>
<msr:numberOfDimensions>
<gco:Integer>3</gco:Integer>
</msr:numberOfDimensions>
<msr:axisDimensionProperties>
<msr:MD_Dimension>
<msr:dimensionName>
<msr:MD_DimensionNameTypeCode codeList="(…snip…)#MD_DimensionNameTypeCode" codeListValue="column">Column</msr:MD_DimensionNameTypeCode>
</msr:dimensionName>
<msr:dimensionSize>
<gco:Integer>865</gco:Integer>
</msr:dimensionSize>
</msr:MD_Dimension>
</msr:axisDimensionProperties>
<msr:axisDimensionProperties>
<msr:MD_Dimension>
<msr:dimensionName>
<msr:MD_DimensionNameTypeCode codeList="(…snip…)#MD_DimensionNameTypeCode" codeListValue="row">Row</msr:MD_DimensionNameTypeCode>
</msr:dimensionName>
<msr:dimensionSize>
<gco:Integer>1081</gco:Integer>
</msr:dimensionSize>
</msr:MD_Dimension>
</msr:axisDimensionProperties>
<msr:axisDimensionProperties>
<msr:MD_Dimension>
<msr:dimensionName>
<msr:MD_DimensionNameTypeCode codeList="(…snip…)#MD_DimensionNameTypeCode" codeListValue="time">Time</msr:MD_DimensionNameTypeCode>
</msr:dimensionName>
<msr:dimensionSize>
<gco:Integer>96</gco:Integer>
</msr:dimensionSize>
</msr:MD_Dimension>
</msr:axisDimensionProperties>
<msr:cellGeometry>
<msr:MD_CellGeometryCode codeList="(…snip…)#MD_CellGeometryCode" codeListValue="area">Area</msr:MD_CellGeometryCode>
</msr:cellGeometry>
<msr:transformationParameterAvailability>
<gco:Boolean>false</gco:Boolean>
</msr:transformationParameterAvailability>
</msr:MD_GridSpatialRepresentation>
</mdb:spatialRepresentationInfo>
<mdb:referenceSystemInfo>
<mrs:MD_ReferenceSystem>
<mrs:referenceSystemIdentifier>
<mcc:MD_Identifier>
<mcc:code>
<gco:CharacterString>time latitude longitude</gco:CharacterString>
</mcc:code>
</mcc:MD_Identifier>
</mrs:referenceSystemIdentifier>
</mrs:MD_ReferenceSystem>
</mdb:referenceSystemInfo>
<mdb:identificationInfo>
<mri:MD_DataIdentification>
<mri:citation>
<cit:CI_Citation>
<cit:title>
<gco:CharacterString>Ocean surface 15-minutes mean fields for the Iberia-Biscay-Ireland (IBI) region</gco:CharacterString>
</cit:title>
<cit:identifier>
<mcc:MD_Identifier>
<mcc:code>
<gco:CharacterString>CMEMS_v5r1_IBI_PHY_NRT_PdE_15minav_20220516_20220516_R20220516_FC01</gco:CharacterString>
</mcc:code>
</mcc:MD_Identifier>
</cit:identifier>
<cit:citedResponsibleParty>
<cit:CI_Responsibility>
<cit:role>
<cit:CI_RoleCode codeList="(…snip…)#CI_RoleCode" codeListValue="originator">Originator</cit:CI_RoleCode>
</cit:role>
<cit:party>
<cit:CI_Organisation>
<cit:name>
<gco:CharacterString>Puertos del Estado (PdE)</gco:CharacterString>
</cit:name>
</cit:CI_Organisation>
</cit:party>
</cit:CI_Responsibility>
</cit:citedResponsibleParty>
<cit:otherCitationDetails>
<gco:CharacterString>http://marine.copernicus.eu/</gco:CharacterString>
</cit:otherCitationDetails>
</cit:CI_Citation>
</mri:citation>
<mri:pointOfContact>
<cit:CI_Responsibility>
<cit:role>
<cit:CI_RoleCode codeList="(…snip…)#CI_RoleCode" codeListValue="pointOfContact">Point of contact</cit:CI_RoleCode>
</cit:role>
<cit:party>
<cit:CI_Organisation>
<cit:name>
<gco:CharacterString>Puertos del Estado (PdE)</gco:CharacterString>
</cit:name>
</cit:CI_Organisation>
</cit:party>
</cit:CI_Responsibility>
</mri:pointOfContact>
<mri:spatialRepresentationType>
<mcc:MD_SpatialRepresentationTypeCode codeList="(…snip…)#MD_SpatialRepresentationTypeCode" codeListValue="grid">Grid</mcc:MD_SpatialRepresentationTypeCode>
</mri:spatialRepresentationType>
<mri:resourceFormat>
<mrd:MD_Format>
<mrd:formatSpecificationCitation>
<cit:CI_Citation>
<cit:title>
<gco:CharacterString>Hierarchical Data Format, version 5</gco:CharacterString>
</cit:title>
<cit:alternateTitle>
<gco:CharacterString>NetCDF-4</gco:CharacterString>
</cit:alternateTitle>
</cit:CI_Citation>
</mrd:formatSpecificationCitation>
</mrd:MD_Format>
</mri:resourceFormat>
</mri:MD_DataIdentification>
</mdb:identificationInfo>
<mdb:contentInfo>
<mrc:MD_CoverageDescription>
<mrc:attributeGroup>
<mrc:MD_AttributeGroup>
<mrc:attribute>
<mrc:MD_SampleDimension>
<mrc:sequenceIdentifier>
<gco:MemberName>
<gco:aName>
<gco:CharacterString>zos</gco:CharacterString>
</gco:aName>
<gco:attributeType>
<gco:TypeName>
<gco:aName>
<gco:CharacterString>short[865][1081][96]</gco:CharacterString>
</gco:aName>
</gco:TypeName>
</gco:attributeType>
</gco:MemberName>
</mrc:sequenceIdentifier>
<mrc:description>
<gco:CharacterString>Sea surface height</gco:CharacterString>
</mrc:description>
<mrc:name>
<mcc:MD_Identifier>
<mcc:code>
<gco:CharacterString>sea_surface_height_above_geoid</gco:CharacterString>
</mcc:code>
</mcc:MD_Identifier>
</mrc:name>
<mrc:units>m</mrc:units>
<mrc:scaleFactor>
<gco:Real>0.001</gco:Real>
</mrc:scaleFactor>
<mrc:offset>
<gco:Real>0.0</gco:Real>
</mrc:offset>
</mrc:MD_SampleDimension>
</mrc:attribute>
<mrc:attribute>
<mrc:MD_SampleDimension>
<mrc:sequenceIdentifier>
<gco:MemberName>
<gco:aName>
<gco:CharacterString>uo</gco:CharacterString>
</gco:aName>
<gco:attributeType>
<gco:TypeName>
<gco:aName>
<gco:CharacterString>short[865][1081][96]</gco:CharacterString>
</gco:aName>
</gco:TypeName>
</gco:attributeType>
</gco:MemberName>
</mrc:sequenceIdentifier>
<mrc:description>
<gco:CharacterString>Eastward velocity</gco:CharacterString>
</mrc:description>
<mrc:name>
<mcc:MD_Identifier>
<mcc:code>
<gco:CharacterString>eastward_sea_water_velocity</gco:CharacterString>
</mcc:code>
</mcc:MD_Identifier>
</mrc:name>
<mrc:units>m∕s</mrc:units>
<mrc:scaleFactor>
<gco:Real>0.001</gco:Real>
</mrc:scaleFactor>
<mrc:offset>
<gco:Real>0.0</gco:Real>
</mrc:offset>
</mrc:MD_SampleDimension>
</mrc:attribute>
<mrc:attribute>
<mrc:MD_SampleDimension>
<mrc:sequenceIdentifier>
<gco:MemberName>
<gco:aName>
<gco:CharacterString>vo</gco:CharacterString>
</gco:aName>
<gco:attributeType>
<gco:TypeName>
<gco:aName>
<gco:CharacterString>short[865][1081][96]</gco:CharacterString>
</gco:aName>
</gco:TypeName>
</gco:attributeType>
</gco:MemberName>
</mrc:sequenceIdentifier>
<mrc:description>
<gco:CharacterString>Northward velocity</gco:CharacterString>
</mrc:description>
<mrc:name>
<mcc:MD_Identifier>
<mcc:code>
<gco:CharacterString>northward_sea_water_velocity</gco:CharacterString>
</mcc:code>
</mcc:MD_Identifier>
</mrc:name>
<mrc:units>m∕s</mrc:units>
<mrc:scaleFactor>
<gco:Real>0.001</gco:Real>
</mrc:scaleFactor>
<mrc:offset>
<gco:Real>0.0</gco:Real>
</mrc:offset>
</mrc:MD_SampleDimension>
</mrc:attribute>
</mrc:MD_AttributeGroup>
</mrc:attributeGroup>
</mrc:MD_CoverageDescription>
</mdb:contentInfo>
<mdb:resourceLineage>
<mrl:LI_Lineage>
<mrl:source>
<mrl:LI_Source>
<mrl:description>
<gco:CharacterString>IBI-MFC (PdE Production Center)</gco:CharacterString>
</mrl:description>
</mrl:LI_Source>
</mrl:source>
</mrl:LI_Lineage>
</mdb:resourceLineage>
<mdb:metadataScope>
<mdb:MD_MetadataScope>
<mdb:resourceScope>
<mcc:MD_ScopeCode codeList="(…snip…)#MD_ScopeCode" codeListValue="dataset">Dataset</mcc:MD_ScopeCode>
</mdb:resourceScope>
</mdb:MD_MetadataScope>
</mdb:metadataScope>
</mdb:MD_Metadata>