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/**
 * 本作品使用 木兰公共许可证,第2版（Mulan PubL v2） 开源协议，请遵守相关条款，或者联系sicheng.net获取商用授权。
 * Copyright (c) 2016 SiCheng.Net
 * This software is licensed under Mulan PubL v2.
 * You can use this software according to the terms and conditions of the Mulan PubL v2.
 * You may obtain a copy of Mulan PubL v2 at:
 *          http://license.coscl.org.cn/MulanPubL-2.0
 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
 * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
 * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
 * See the Mulan PubL v2 for more details.
 */
package com.sicheng.common.utils;

import com.drew.imaging.jpeg.*;
import com.drew.lang.*;
import com.drew.metadata.*;
import com.drew.metadata.exif.*;

import java.io.File;

public class ImageGeo {
    public double lat = 0.0;
    public double lon = 0.0;
    public double alt = 0.0;
    public boolean error = false;

    public ImageGeo(String filename) {
        try {
            error = false;
            File jpegFile = new File(filename);
            Metadata metadata = JpegMetadataReader.readMetadata(jpegFile);

            GpsDirectory gpsdir = (GpsDirectory) metadata
                    .getDirectory(GpsDirectory.class);
            Rational latpart[] = gpsdir
                    .getRationalArray(GpsDirectory.TAG_GPS_LATITUDE);
            Rational lonpart[] = gpsdir
                    .getRationalArray(GpsDirectory.TAG_GPS_LONGITUDE);
            String northing = gpsdir
                    .getString(GpsDirectory.TAG_GPS_LATITUDE_REF);
            String easting = gpsdir
                    .getString(GpsDirectory.TAG_GPS_LONGITUDE_REF);

            try {
                alt = gpsdir.getDouble(GpsDirectory.TAG_GPS_ALTITUDE);
            } catch (Exception ex) {
            }

            double latsign = 1.0d;
            if (northing.equalsIgnoreCase("S"))
                latsign = -1.0d;
            double lonsign = 1.0d;
            if (easting.equalsIgnoreCase("W"))
                lonsign = -1.0d;
            lat = (Math.abs(latpart[0].doubleValue())
                    + latpart[1].doubleValue() / 60.0d + latpart[2]
                    .doubleValue() / 3600.0d) * latsign;
            lon = (Math.abs(lonpart[0].doubleValue())
                    + lonpart[1].doubleValue() / 60.0d + lonpart[2]
                    .doubleValue() / 3600.0d) * lonsign;

            if (Double.isNaN(lat) || Double.isNaN(lon))
                error = true;
        } catch (Exception ex) {
            error = true;
        }
        System.out.println(filename + ": (" + lat + ", " + lon + ")");
    }

    public static void main(String[] args) {
        ImageGeo imageGeo = new ImageGeo(ImageGeo.class.getResource("IMAG0068.jpg").getFile());
        System.out.println(imageGeo.lon + "," + imageGeo.lat);
    }

}