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- -------------------- J P R O J . 4 --------------------
-
-This is the second release of JNI wrappers for the main proj4 functions.
-
-PLEASE read the following information.
-
-The first release of JNI wrappers were created by:
-
- http://www.hydrologis.com
-
-For more information regarding the current release please see the web page at:
-
- http://www.geoapi.org/geoapi-proj4/
-
- ---------------------------------------------------
-
-
-What is "Proj.4 wrapper":
--------------
-
-"Proj.4 wrapper" is a small library of Java classes that wrap a few Proj.4 functions by
-using the Java Native Interface (JNI). The main Java class is org.proj4.PJ.
-
-
-Compilation:
--------------
-
-To compile the native part, configure has to be run in the proj directory like this:
-
- CFLAGS=-Iinclude2 ./configure --with-jni=include1
-
-where
-
- include1 = folder in which the header file jni.h resides (usually $JAVA_HOME/include)
- include2 = folder in which the header file jni_md.h resides (usually $JAVA_HOME/include/linux or whatever)
-
-On MacOS, those two folders are /System/Library/Frameworks/JavaVM.framework/Versions/CurrentJDK/Home/include/
-
-
-The java part is compiled by running ant inside the "jniwrap" folder.
-This will compile the classes and archive them in a jar library.
-It applies to Linux, Macos and Windows (and virtually to every system
-supporting java).
-
-
-Requirements:
--------------
-
-Beyond the ones already put by Proj.4, you need:
-- JSE 1.5+, the Java standard development kit version 1.5 or above
-- Ant, to run the build
-- Doxygen for the documentation generation
-
-
-Documentation:
---------------
-
-The documentation is held inside the code and can be retrieved by running
-doxygen inside the folder jniwrap. This will create the HTML format
-documentation inside of jniwrap/docs
-
-The standard way to achieve this is to use an Ant target:
-
- ant do_make_help
-
-
-License:
---------
-
-GPL for the first release
-Proj.4 license for the second release.
-
-
-Authors:
---------
-
-Andrea Antonello (andrea.antonello@hydrologis.com)
-Martin Desruisseaux (martin.desruisseaux@geomatys.fr)
-
-
-Usage & a fast example:
------------------------
-
-The jproj.jar is all is needed to implement proj support in java applications.
-The whole job is done by the proj4, so there are just a couple of functions that
-be used.
-
-The best way is to see everything through an example.
-In the following example we create two Coordinate System and transform 3 points.
-The Coordinate System and the points are hard-coded for simplicity. Of course,
-real applications would read them from a file or other data source.
-
-________________________________________________________________________________
-import org.proj4.*;
-import java.util.Arrays;
-
-
-/**
- * Converts coordinates from EPSG:32632 (WGS 84 / UTM zone 32N) to WGS84,
- * then prints the result to the standard output stream.
- */
-public class Main {
- public static void main(String[] args) throws PJException {
- PJ sourcePJ = new PJ("+init=epsg:32632"); // (x,y) axis order
- PJ targetPJ = new PJ("+proj=latlong +datum=WGS84"); // (λ,φ) axis order
- double[] coordinates = {
- 500000, 0, // First coordinate
- 400000, 100000, // Second coordinate
- 600000, -100000 // Third coordinate
- };
- sourcePJ.transform(targetPJ, 2, coordinates, 0, 3);
- System.out.println(Arrays.toString(coordinates));
- }
-}
-________________________________________________________________________________
-
-compile the Main code:
-we assume that proj was compiled with the right flag to support jproj.
-Therefore we have a library called jproj.jar.
-Thus we compile the Main.java with the command:
-
-javac -classpath <path to the jar library>/jproj.jar Main.java
-
-and execute the created test case with:
-
-java -cp .:<path to the jar library>/jproj.jar -Djava.library.path=<path to the libproj, if needed> Main
-
-That's it, enjoy!