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SAE J2735-Draft-Rev26 [issued: 09-18-08]
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70 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
-- 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
DF
In addition, this item may be used by data structures in other ITS standards.
6.35 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
elev Elevation OPTIONAL, -- 3 bytes
...
}
XML Representation:
<xs:complexType name="ReferencePoint" >
<xs:sequence>
<!-- pos PositionLocal3D, -->
<xs:element name="lat" type="Latitude" />
<!-- 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
DF
In addition, this item may be used by data structures in other ITS standards.
Remarks: In use, all subsequent offset value are added to this point in order to determine the absolute
position to be described. In some data structures more than once ReferencePoint may be present. Data
values are interpreted in a stream fashion. That is, until a new ReferencePoint is read, the value for the last
one is used as the basis for all offset values found the same structure.
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