syntax = "proto2";

package ltpb;

message GPSData {
    optional double latitude = 1;
    optional double longitude = 2;
    optional uint64 timestamp = 3;
    optional double dop = 4;
    
    optional Track track = 5;
    message Track {
        required double value = 1;
        required ReferenceNorth ref = 2;
    }
    
    optional Heading heading = 6;
    message Heading {
        required double value = 1;
        required ReferenceNorth ref = 2;
    }
    
    optional Altitude altitude = 7;
    message Altitude {
        required double value = 1;
        required ReferenceAltitude ref = 2;
    }
    
    optional double speed = 8;
    
    optional ProcessingMethod processing_method = 9;
    enum ProcessingMethod {
        PROCESSING_METHOD_UNKNOWN = 0;
        PROCESSING_METHOD_GPS = 1;
        PROCESSING_METHOD_CELLID = 2;
        PROCESSING_METHOD_WLAN = 3;
        PROCESSING_METHOD_MANUAL = 4;
        PROCESSING_METHOD_FUSED = 5;
    }
    
    enum ReferenceNorth {
        REFERENCE_NORTH_MAGNETIC = 0;
        REFERENCE_NORTH_TRUE = 1;
    }
    
    enum ReferenceAltitude {
        REFERENCE_ALTITUDE_SEA_LEVEL = 0;
    }
}