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SAE J2735-Draft-Rev28 [issued: 11-10-08]
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72 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
6.32 Data Frame: DF_PositionConfidenceSet
Use: A single byte long data frame combining multiple related bit fields into one byte.
ASN.1 Representation:
PositionConfidenceSet ::= SEQUENCE {
pos PositionConfidence,
-- 4 bits, for both hoz directions
elevation ElevationConfidence
-- 4 bits
}
XML Representation:
<xs:complexType name="PositionConfidenceSet" >
<xs:sequence>
<xs:element name="pos" type="PositionConfidence" />
<!-- 4 bits, for both hoz directions -->
<xs:element name="elevation" type="ElevationConfidence" />
<!-- 4 bits -->
</xs:sequence>
</xs:complexType>
Used By: This entry is directly used by the following 2 other data structures in this standard (record type,
descriptive name, ASN.1, and XML name (if present) of each):
DF
<XML>, and
DF
In addition, this item may be used by data structures in other ITS standards.
6.33 Data Frame: DF_ReferencePoint
Use: A data concept which provides a definitive and precise location in the WSG-84 coordinate systems
from which short offsets are then used to create additional data using a flat earth geonimc (sp?) project
centered from this point.. Typically used in the description of maps and intersections.
ASN.1 Representation:
ReferencePoint ::= SEQUENCE {
-- pos PositionLocal3D,
lat Latitude, -- 4 bytes (1/8th micro degrees)
long Longitude, -- 4 bytes
...
}
XML Representation:
<xs:complexType name="ReferencePoint" >
<xs:sequence>
<!-- pos PositionLocal3D, -->
<!-- 4 bytes (1/8th micro degrees) -->
<xs:element name="long" type="Longitude" />
<!-- 4 bytes -->
<xs:element name="elev" type="Elevation" minOccurs="0"/>
<!-- 3 bytes -->
</xs:sequence>
</xs:complexType>
Used By: This entry is directly used by the following 2 other data structures in this standard (record type,
descriptive name, ASN.1, and XML name (if present) of each):
DF
<XML>, and
DF
In addition, this item may be used by data structures in other ITS standards.