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SAE J2735-Draft-Rev15 [issued: 01-30-07]
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68 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
7.21 Data Element: DE_Heading
Use: The current heading of the vehicle, expressed in signed units of 0.005493247 degrees from North (such that
65,535 such degrees represent 360 degrees). North shall be defined as the axis defined by the WSG-84
coordinate system and its reference ellipsoid. Headings "to the east" are defined as the positive direction. A 2
byte value.
ASN.1 Representation:
Heading ::= INTEGER (0..65535) -- LSB of 0.00549 degrees
XML Representation:
<xs:simpleType name="Heading" >
<xs:annotation>
<xs:documentation>
LSB of 0.00549 degrees
</xs:documentation>
</xs:annotation>
<xs:restriction base="xs:unsignedShort"/>
</xs:simpleType>
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
DF
DF
MSG
DF
In addition, this item may be used by data structures in other ITS standards.
Remarks: Note that one byte heading data elements are found in other parts of ITS.
7.22 Data Element: DE_Latitude
Use: The geographic latitude of a node, expressed in 1/8th integer microdegrees, as a 32 bit value and with
reference to the horizontal datum specified by horizontalDatum.
ASN.1 Representation:
Latitude ::= INTEGER (-7200000000..720000000)
-- in LSB = 1/8 micro degree
XML Representation:
<xs:simpleType name="Latitude" >
<xs:annotation>
<xs:documentation>
in LSB = 1/8 micro degree
Providing a range of plus-minus 90 degrees
</xs:documentation>
</xs:annotation>
<xs:restriction base="xs:int">
<xs:minInclusive value="-7200000000"/>
<xs:maxInclusive value="720000000"/>
</xs:restriction>
</xs:simpleType>
Used by: This entry is directly used by the following 6 other data structures in this standard (record type, descriptive name,
ASN.1, and XML name (if present) of each):
DF