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
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--- /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();
+    }
+
+}