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SAE J2735-Draft-Rev29 [issued: 12-11-08]
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54 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
<!-- 1/8th microdegree -->
<xs:element name="lat" type="Latitude" />
<!-- 1/8th microdegree -->
<xs:element name="elevation" type="Elevation" minOccurs="0"/>
<!-- 3 bytes, 0.1 m -->
<xs:element name="heading" type="Heading" minOccurs="0"/>
<xs:element name="speed" type="Speed" minOccurs="0"/>
<xs:element name="posAccuracy" type="PositionalAccuracy" minOccurs="0"/>
<xs:element name="timeConfidence" type="TimeConfidence" minOccurs="0"/>
<xs:element name="posConfidence" type="PositionConfidenceSet" minOccurs="0"/>
<xs:element name="speedConfidence" type="SpeedandHeadingConfidence"
minOccurs="0"/>
<xs:element name="localFullPositionVector" type="local:FullPositionVector"
minOccurs="0"/>
</xs:sequence>
</xs:complexType>
Used By: This entry is directly used by the following 5 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
MSG
<XML>, and
MSG
In addition, this item may be used by data structures in other ITS standards.
Remarks: In edition one of the standard the first 2 bytes were a DSecond followed by DFulTime in 6
bytes. This produced a complete time value in 8 bytes. In this edition, these have been re-ordered into a
single value, that of DDateTime. This changes the ordering (but not the size) encoded over the wire, and
the ordering and the tags when expressed in XML.
6.21 Data Frame: DF_Intersection
Use: A complete description of an intersection's roadway geometry and its allowed navigational paths
(independent of any additional regulatory restrictions that may apply over time or from user classification).
ASN.1 Representation:
Intersection ::= SEQUENCE {
name DescriptiveName OPTIONAL,
id IntersectionID,
-- a gloablly unique value,
-- the upper bytes of which may not
-- be sent if the context is known
refPoint ReferencePoint OPTIONAL,
-- the reference from which subsequent
-- data points are offset untill a new
-- point is used.
refInterNum IntersectionID OPTIONAL,
-- present only if this is a computed
-- intersection instance
orientation Heading OPTIONAL,
-- present only if this is a computed
-- intersection instance
laneWidth LaneWidth OPTIONAL,
-- reference width used by subsequent
-- lanes until a new width is given
type IntersectionStatusObject OPTIONAL,
-- data about the intersection type
approaches SEQUENCE (SIZE(1..32)) OF