         }
     }
 
-    
+    // geographic longitude degrees
     var longitude: Float? {
         get {
             return StudentInformation.validLongitude(data[OnTheMapParseService.ParseJsonKey.Longitude] as? Float)

        }
    }

    var mediaUrl: String? {
        get {
            return data[OnTheMapParseService.ParseJsonKey.MediaUrl] as? String

// MARK: - StudentInformation

// StudentInformation
// type safe wrapper around simple name-value pairs representing Student data
struct StudentInformation {
    
    // name value property pairs
    private var data: [String:AnyObject]
    
    // formatter for Parse date properties on student data objects
    private let dateFormatter: NSDateFormatter
    
    init?(parseData data: [String:AnyObject]) {
