               data.features.push({
                        "type": "Feature",
                        "properties": { "id": entry.id, "title": entry.title, "activitytype" : entry.activitytype, "trackgroupentrycount": entry.trackgroupentrycount},
                        "geometry": { "type": "Point", "coordinates": [ entry.longitude, entry.latitude, 0.0 ] }
                    });
            }
        }
    }

    function minToString(minutes) {
        var m = minutes % 60;
        var h = (minutes-m)/60;