[GeoTools] Load the EPSG Properties File

레드트레인 2013. 4. 3. 17:11

GeoTools에서 좌표를 지정하거나 좌표변환을 하기 위해서는 EPSG 코드를 사용하게 되는데 기본 라이브러리에 포함되지 않은 EPSG 코드가 있을경우 org.opengis.referencing.NoSuchAuthorityCodeException 가 발생한다.

아래와 같은 방법으로 사용자 정의 프로퍼티 파일을 읽어 추가시켜줄 수 있다.

import java.io.File;
import java.io.IOException;
import java.net.URL;

import org.geotools.factory.Hints;
import org.geotools.metadata.iso.citation.Citations;
import org.geotools.referencing.CRS;
import org.geotools.referencing.ReferencingFactoryFinder;
import org.geotools.referencing.factory.PropertyAuthorityFactory;
import org.geotools.referencing.factory.ReferencingFactoryContainer;
import org.opengis.referencing.FactoryException;
import org.opengis.referencing.NoSuchAuthorityCodeException;
import org.opengis.referencing.crs.CoordinateReferenceSystem;

...

public void setEPSGProperties() throws 
		IOException, NoSuchAuthorityCodeException, FactoryException {

File file = new File(this.getClass().getResource("/").getPath() + "/epsg.properties");

@SuppressWarnings("deprecation")
	URL url = file.toURL();
	if (file.exists()) {
		System.out.println( file.getParent() );
	}

Hints hints = new Hints(Hints.CRS_AUTHORITY_FACTORY, PropertyAuthorityFactory.class);
	ReferencingFactoryContainer referencingFactoryContainer = 
			ReferencingFactoryContainer.instance(hints);

PropertyAuthorityFactory factory = new PropertyAuthorityFactory(
			referencingFactoryContainer, Citations.fromName("EPSG"), url);

ReferencingFactoryFinder.addAuthorityFactory(factory);

//WKT로 확인
	CoordinateReferenceSystem crs = CRS.decode("EPSG:5181");
	System.out.println( crs.toWKT() );

}

...

<EPSG:5181 - WKT>

Dependency Library

commons-dbcp
gt-data
gt-epsg-hsql
gt-jdbc
gt-referencing
gt-render
hsqldb
jsr-275