1 files changed, 60 insertions, 0 deletions
diff --git a/EssentialsGeoIP/src/com/maxmind/geoip/Location.java b/EssentialsGeoIP/src/com/maxmind/geoip/Location.java
new file mode 100644
index 000000000..040fcb6b1
--- /dev/null
+++ b/EssentialsGeoIP/src/com/maxmind/geoip/Location.java
@@ -0,0 +1,60 @@
+/**
+ * Location.java
+ *
+ * Copyright (C) 2004 MaxMind LLC.  All Rights Reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Lesser Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+package com.maxmind.geoip;
+
+public class Location {
+    public String countryCode;
+    public String countryName;
+    public String region;
+    public String city;
+    public String postalCode;
+    public float latitude;
+    public float longitude;
+    public int dma_code;
+    public int area_code;
+    public int metro_code;
+
+    private final static double EARTH_DIAMETER = 2 * 6378.2;
+    private final static double PI = 3.14159265;
+    private final static double RAD_CONVERT = PI / 180;
+
+    public double distance (Location loc) {
+        double delta_lat, delta_lon;
+        double temp;
+
+        float lat1 = latitude;
+        float lon1 = longitude;
+        float lat2 = loc.latitude;
+        float lon2 = loc.longitude;
+
+        // convert degrees to radians
+        lat1 *= RAD_CONVERT;
+        lat2 *= RAD_CONVERT;
+
+        // find the deltas
+        delta_lat = lat2 - lat1;
+        delta_lon = (lon2 - lon1) * RAD_CONVERT;
+
+        // Find the great circle distance
+        temp = Math.pow(Math.sin(delta_lat/2),2) + Math.cos(lat1) * Math.cos(lat2) * Math.pow(Math.sin(delta_lon/2),2);
+        return EARTH_DIAMETER * Math.atan2(Math.sqrt(temp),Math.sqrt(1-temp));
+    }
+}