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Diffstat (limited to 'framework/src/onos/utils/misc/src/main/java/org/onlab/util/GeoLocation.java')
-rw-r--r-- | framework/src/onos/utils/misc/src/main/java/org/onlab/util/GeoLocation.java | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/framework/src/onos/utils/misc/src/main/java/org/onlab/util/GeoLocation.java b/framework/src/onos/utils/misc/src/main/java/org/onlab/util/GeoLocation.java new file mode 100644 index 00000000..7e546531 --- /dev/null +++ b/framework/src/onos/utils/misc/src/main/java/org/onlab/util/GeoLocation.java @@ -0,0 +1,85 @@ +/* + * Copyright 2014-2015 Open Networking Laboratory + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.onlab.util; + +import com.google.common.base.MoreObjects; + +/** + * Geo location specified in terms of longitude and latitude. + */ +public class GeoLocation { + + public static final double EARTH_RADIUS_KM = 6378.1370D; + + private final double latitude; + private final double longitude; + + /** + * Creates a new location using the specified coordinates. + * + * @param latitude latitude line + * @param longitude longitude line + */ + public GeoLocation(double latitude, double longitude) { + this.latitude = latitude; + this.longitude = longitude; + } + + /** + * Returns the latitude of this location. + * + * @return latitude + */ + public double latitude() { + return latitude; + } + + /** + * Returns the longitude of this location. + * + * @return longitude + */ + public double longitude() { + return longitude; + } + + /** + * Returns the distance in kilometers, between this location and another. + * + * @param other other geo location + * @return distance in kilometers + */ + public double kilometersTo(GeoLocation other) { + double hereLat = Math.toRadians(latitude); + double hereLon = Math.toRadians(longitude); + double thereLat = Math.toRadians(other.latitude); + double thereLon = Math.toRadians(other.longitude); + + double cos = Math.sin(hereLat) * Math.sin(thereLat) + + Math.cos(hereLat) * Math.cos(thereLat) * Math.cos(hereLon - thereLon); + return Math.acos(cos) * EARTH_RADIUS_KM; + } + + @Override + public String toString() { + return MoreObjects.toStringHelper(this) + .add("latitude", latitude) + .add("longitude", longitude) + .toString(); + } + +} |