sub latitudeType {
    # The latitude of the point. Decimal degrees, WGS84 datum.
    my($class, $value) = @_;
    return FALSE if _is_null($value);
    return xsd_decimal($value) and $value >= -90.0 and $value <= 90.0 and TRUE;
}


  
sub longitudeType {
    # The longitude of the point. Decimal degrees, WGS84 datum.
    my($class, $value) = @_;
    return FALSE if _is_null($value);
    return xsd_decimal($value) and $value >= -180.0 and $value < 180.0 and TRUE;
}


  
sub degreesType {
    # Used for bearing, heading, course. Units are decimal degrees, true (not magnetic).
    my($class, $value) = @_;
    return FALSE if _is_null($value);
    return xsd_decimal($value) and $value >= 0.0 and $value < 360.0 and TRUE;
}


  
sub fixType {
    # Type of GPS fix. none means GPS had no fix. To signify "the fix info is unknown, leave out fixType entirely. pps = military signal used
    my($class, $value) = @_;
    return FALSE if _is_null($value);
    return xsd_string($value) and TRUE;
}


  
sub dgpsStationType {
    # Represents a differential GPS station.
    my($class, $value) = @_;
    return FALSE if _is_null($value);
    return xsd_integer($value) and $value >= 0 and $value <= 1023 and TRUE;
}