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diff --git a/src/net/cbaines/suma/POIDistanceComparator.java b/src/net/cbaines/suma/POIDistanceComparator.java
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+++ b/src/net/cbaines/suma/POIDistanceComparator.java
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+/*
+ * Southampton University Map App
+ * Copyright (C) 2011  Christopher Baines
+ * 
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * 
+ * This program 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 General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+package net.cbaines.suma;
+
+import java.util.Comparator;
+
+import org.osmdroid.util.GeoPoint;
+
+public class POIDistanceComparator implements Comparator<POI> {
+    private final GeoPoint userLocation;
+    private final boolean useExistingData;
+
+    public POIDistanceComparator(GeoPoint userLocation) {
+	this(userLocation, false);
+    }
+
+    public POIDistanceComparator(GeoPoint userLocation, boolean useData) {
+	super();
+	this.userLocation = userLocation;
+	this.useExistingData = useData;
+    }
+
+    public int compare(POI poi1, POI poi2) {
+	if (poi1.distTo == -1 || !useExistingData) {
+	    poi1.distTo = userLocation.distanceTo(poi1.point);
+	}
+	if (poi2.distTo == -1 || !useExistingData) {
+	    poi2.distTo = userLocation.distanceTo(poi2.point);
+	}
+	return poi1.distTo - poi2.distTo;
+    }
+
+}