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SAE J2735-Draft-Rev29 [issued: 12-11-08]
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64 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
6.31 Data Frame: DF_Position3D
Use: A collection of the two 4 byte lat-long information elements and the one 2 byte elevation used to
build a complete 3D position set in 10 bytes.
ASN.1 Representation:
Position3D ::= SEQUENCE {
lat Latitude, -- in 1/8th micro degrees
long Longitude, -- in 1/8th micro degrees
elevation Elevation OPTIONAL
}
XML Representation:
<xs:complexType name="Position3D" >
<xs:sequence>
<xs:element name="lat" type="Latitude" />
<!-- in 1/8th micro degrees -->
<xs:element name="long" type="Longitude" />
<!-- in 1/8th micro degrees -->
<xs:element name="elevation" type="Elevation" minOccurs="0"/>
</xs:sequence>
</xs:complexType>
Used By: This entry is directly used by the following 4 other data structures in this standard (record type,
descriptive name, ASN.1, and XML name (if present) of each):
DF
<XML>, and
DF
<XML>, and
DF
<XML>, and
DF
In addition, this item may be used by data structures in other ITS standards.
Remarks: Note that this data frame is also used in defining a data blob.
6.32 Data Element: DF_PositionConfidenceSet
Use: A single byte long data frame combining multiple related bit fields into one byte.
ASN.1 Representation:
PositionConfidenceSet ::= OCTET STRING (SIZE(1))
-- To be encoded as:
-- SEQUENCE {
-- pos PositionConfidence,
-- -x- 4 bits, for both hoz directions
-- elevation ElevationConfidence
-- -x- 4 bits
-- }
XML Representation:
<xs:complexType name="PositionConfidenceSet" >
<xs:simpleContent>
<xs:annotation>
<xs:documentation>
To be encoded as:
SEQUENCE {
pos PositionConfidence,
-x- 4 bits, for both hoz directions
elevation ElevationConfidence
-x- 4 bits
}
</xs:documentation>
</xs:annotation>
<xs:extension base="PositionConfidenceSet-string" >