import org.geotools.metadata.iso.citation.Citations; //导入依赖的package包/类
/**
 * Creates the SRS from the selected SRID
 * 
 * @param srid The srid from the selected Entry in Combo
 */
private void createComboSelectionSRS(String srid) {
	String authority_epsg = Citations.getIdentifier(Citations.EPSG);
	CRSAuthorityFactory factory = ReferencingFactoryFinder.getCRSAuthorityFactory(authority_epsg, null);
	try {
		if(srid == ""){
			selectedSRS = SRS.UNKNOWN;
		}else{
			selectedSRS = new SRS(authority_epsg, srid, factory.getDescriptionText(srid).toString());						
		}
	} catch (Exception ex) {
		selectedSRS = new SRS("GeoKettle", srid, "Custom");
	}
}
 

import org.geotools.metadata.iso.citation.Citations; //导入依赖的package包/类
/**
 * Fills a {@link SRSInit} object with the correct initialization values
 * needed by constructors (authority, description, srid).
 * 
 * Note: The method tries to retrieve as much information from the
 * {@link CoordinateReferenceSystem} <code>crs</code> as possible.
 * 
 * @param init Pass the {@link SRSInit} object to allow multiple return-values.
 * @param crs The {@link CoordinateReferenceSystem} where the information
 *            are retrieved from.
 */
private void getProperties(SRSInit init, CoordinateReferenceSystem crs) {
	// Try to find srid, authority and description from the CRS.
	// Abort if the correct EPSG identifiers were found.
	Set<ReferenceIdentifier> identifiers = crs.getIdentifiers();
	if (!identifiers.isEmpty()) {
		for (ReferenceIdentifier id : identifiers) {
			init.auth = Citations.getIdentifier(id.getAuthority());
			init.srid = id.getCode();
			try {					
				CRSAuthorityFactory factory = ReferencingFactoryFinder.getCRSAuthorityFactory(init.auth, HINTS);
				init.desc = factory.getDescriptionText(init.srid).toString();
				this.is_custom = false;
				break;
			} catch (Exception e) {
				this.is_custom = true;
			}
		}
	} else 
		this.is_custom = true;		

	// If this is not an EPSG spatial reference system, use WKT to describe it but get
	// as much information as possible about the SRS from the WKT.
	if (this.is_custom) {
		init.srid = Const.NVL(init.srid, Integer.toString(UNKNOWN_SRID));
		init.auth = Const.NVL(init.auth, "Custom Authority");
		init.desc = Const.NVL(init.desc, "Custom SRS from WKT");
	}
}
 

import org.geotools.metadata.iso.citation.Citations; //导入依赖的package包/类
public void toWKTFormat() throws Exception {
    // toWKTFormat start
    CoordinateReferenceSystem crs = CRS.decode("EPSG:32735");
    Formattable f = (Formattable) CRS.decode("EPSG:32735", true);
    String wkt = f.toWKT(Citations.ESRI, 2); // use 0 indent for single line
    
    System.out.println("wkt for EPSG:32735 (ESRI)");
    System.out.println( wkt );
    // toWKTFormat end
}
 

import org.geotools.metadata.iso.citation.Citations; //导入依赖的package包/类
public static void main(String args[]) {
    MetadataExamples examples = new MetadataExamples();
    
    examples.exampleRange();
    examples.referenceDocument(Citations.EPSG);
    examples.referenceDocument(Citations.OGC);
    examples.referenceDocument(Citations.ORACLE);
    examples.exampleCitation(examples);
    examples.telephone();
    examples.wkt();
}
 

import org.geotools.metadata.iso.citation.Citations; //导入依赖的package包/类
private void exampleCitation(MetadataExamples examples) {
    CitationImpl citation = new CitationImpl();
    citation.setEditionDate(new Date()); // today
    
    Collection<ResponsibleParty> parties = Collections.singleton(ResponsiblePartyImpl.GEOTOOLS);
    citation.setCitedResponsibleParties(parties);
    
    referenceDocument(Citations.ORACLE);
}
 

import org.geotools.metadata.iso.citation.Citations; //导入依赖的package包/类
/**
    * Constructs a default {@code "Crop"} operation.
    */
public Crop() {
	super(new DefaultParameterDescriptorGroup(Citations.GEOTOOLS,
			"CoverageCrop", new ParameterDescriptor[] { SOURCE_0,
					CROP_ENVELOPE, CROP_ROI,
					ROI_OPTIMISATION_TOLERANCE,
					FORCE_MOSAIC}));

}