Created: [Apr 6, 2004]

Defines a GEO iCalendar component property.

     4.8.1.6 Geographic Position

        Property Name: GEO

        Purpose: This property specifies information related to the global
        position for the activity specified by a calendar component.

        Value Type: FLOAT. The value MUST be two SEMICOLON separated FLOAT
        values.

        Property Parameters: Non-standard property parameters can be
        specified on this property.

        Conformance: This property can be specified in  "VEVENT" or "VTODO"
        calendar components.

        Description: The property value specifies latitude and longitude, in
        that order (i.e., "LAT LON" ordering). The longitude represents the
        location east or west of the prime meridian as a positive or negative
        real number, respectively. The longitude and latitude values MAY be
        specified up to six decimal places, which will allow for accuracy to
        within one meter of geographical position. Receiving applications
        MUST accept values of this precision and MAY truncate values of
        greater precision.

        Values for latitude and longitude shall be expressed as decimal
        fractions of degrees. Whole degrees of latitude shall be represented
        by a two-digit decimal number ranging from 0 through 90. Whole
        degrees of longitude shall be represented by a decimal number ranging
        from 0 through 180. When a decimal fraction of a degree is specified,
        it shall be separated from the whole number of degrees by a decimal
        point.

        Latitudes north of the equator shall be specified by a plus sign (+),
        or by the absence of a minus sign (-), preceding the digits
        designating degrees. Latitudes south of the Equator shall be
        designated by a minus sign (-) preceding the digits designating
        degrees. A point on the Equator shall be assigned to the Northern
        Hemisphere.

        Longitudes east of the prime meridian shall be specified by a plus
        sign (+), or by the absence of a minus sign (-), preceding the digits
        designating degrees. Longitudes west of the meridian shall be
        designated by minus sign (-) preceding the digits designating
        degrees. A point on the prime meridian shall be assigned to the
        Eastern Hemisphere. A point on the 180th meridian shall be assigned
        to the Western Hemisphere. One exception to this last convention is
        permitted. For the special condition of describing a band of latitude
        around the earth, the East Bounding Coordinate data element shall be
        assigned the value +180 (180) degrees.

        Any spatial address with a latitude of +90 (90) or -90 degrees will
        specify the position at the North or South Pole, respectively. The
        component for longitude may have any legal value.

        With the exception of the special condition described above, this
        form is specified in Department of Commerce, 1986, Representation of
        geographic point locations for information interchange (Federal
        Information Processing Standard 70-1):  Washington,  Department of
        Commerce, National Institute of Standards and Technology.

        The simple formula for converting degrees-minutes-seconds into
        decimal degrees is:

          decimal = degrees + minutes/60 + seconds/3600.

        Format Definition: The property is defined by the following notation:

          geo        = "GEO" geoparam ":" geovalue CRLF

          geoparam   = *(";" xparam)

          geovalue   = float ";" float
          ;Latitude and Longitude components

        Example: The following is an example of this property:

          GEO:37.386013;-122.082932