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SAE J2735-Draft-Rev28 [issued: 11-10-08]
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127 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
encoding are: Given a value of 0 meters, it would be encoded as 0x0000. Given a value of -0.1 meters, it
would be encoded as 0xFFFF. Given a value of +100.0 meters, it would be encoded as 0x03E8. Given a
value of -409.5 meters, it would be encoded as 0xF001. The largest allowed value, that of 6143.9 meters, is
encoded as 0x0EFFF.
ASN.1 Representation:
Elevation ::= OCTET STRING (SIZE(2))
-- 10 cm LSB with an offset at 0xF000
-- treat as a 2 byte signed value
XML Representation:
<xs:complexType name="Elevation" >
<xs:simpleContent>
<xs:annotation>
<xs:documentation>
10 cm LSB with an offset at 0xF000
treat as a 2 byte signed value
</xs:documentation>
</xs:annotation>
<xs:extension base="Elevation-string" >
<xs:attribute name="EncodingType" use="required">
<xs:simpleType>
<xs:restriction base="xs:NMTOKEN">
<xs:enumeration value="base64Binary"/>
</xs:restriction>
</xs:simpleType>
</xs:attribute>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
<xs:simpleType name="Elevation-string">
<xs:restriction base="xs:base64Binary">
<xs:length value="3"/>
</xs:restriction>
</xs:simpleType >
Used By: This entry is directly used by the following 7 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
DF
<XML>, and
MSG
<XML>, and
DF
DF_Height:frame
In addition, this item may be used by data structures in other ITS standards.
Remarks: The value of zero SHALL be used when an unknown elevation must be sent. The value 61439
(hex 0xEFFF) SHALL be used for any value over 6143.9 meters. The Elevation shall be taken from the
spatial center of the vehicle, when a vehicle is being measured.
7.45 Data Element: DE_EmergencyDetails
Use: The EmergencyDetails data element combines several bit level items into a single word for efficient
transmission.
ASN.1 Representation:
EmergencyDetails ::= INTEGER (0..63)