forked from I2P_Developers/i2p.i2p
zzz
169fd56527
Include Maxmind geoip-api-java library v1.3.1 (LGPL v2.1) Use Maxmind database for geoip lookup if it exists Debian: Don't bundle geoip.txt and geoipv6.dat.gz, depend on geoip-database instead
63 lines
1.8 KiB
Java
63 lines
1.8 KiB
Java
/**
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* Location.java
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*
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* Copyright (C) 2004 MaxMind LLC. All Rights Reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Lesser Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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package com.maxmind.geoip;
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public class Location {
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public String countryCode;
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public String countryName;
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public String region;
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public String city;
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public String postalCode;
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public float latitude;
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public float longitude;
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public int dma_code;
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public int area_code;
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public int metro_code;
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private final static double EARTH_DIAMETER = 2 * 6378.2;
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private final static double PI = 3.14159265;
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private final static double RAD_CONVERT = PI / 180;
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public double distance(Location loc) {
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double delta_lat, delta_lon;
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double temp;
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float lat1 = latitude;
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float lon1 = longitude;
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float lat2 = loc.latitude;
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float lon2 = loc.longitude;
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// convert degrees to radians
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lat1 *= RAD_CONVERT;
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lat2 *= RAD_CONVERT;
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// find the deltas
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delta_lat = lat2 - lat1;
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delta_lon = (lon2 - lon1) * RAD_CONVERT;
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// Find the great circle distance
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temp = Math.pow(Math.sin(delta_lat / 2), 2) + Math.cos(lat1)
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* Math.cos(lat2) * Math.pow(Math.sin(delta_lon / 2), 2);
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return EARTH_DIAMETER
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* Math.atan2(Math.sqrt(temp), Math.sqrt(1 - temp));
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}
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}
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