Oracle Spatial User's Guide and Reference - InfoLab

Usage Notes
SDO_LRS.OFFSET_GEOM_SEGMENT
dim_array
Dimensional information array corresponding to geom_segment, usually selected
from one of the xxx_SDO_GEOM_METADATA views (described in Section 2.4).
start_measure
Start measure of geom_segment at which to start the offset operation.
end_measure
End measure of geom_segment at which to start the offset operation.
offset
Distance to measure perpendicularly from the points along geom_segment.
Positive offset values are to the left of geom_segment; negative offset values are to
the right of geom_segment.
tolerance
Tolerance value (see Section 1.5.5 and Section 7.6).
unit
Unit of measurement specification: a quoted string with one or both of the
following keywords:
■ unit and an SDO_UNIT value from the MDSYS.SDO_DIST_UNITS table. See
Section 2.6 for more information about unit of measurement specification.
■ arc_tolerance and an arc tolerance value. See the Usage Notes for the SDO_
GEOM.SDO_ARC_DENSIFY function in Chapter 13 for more information
about the arc_tolerance keyword.
For example: 'unit=km arc_tolerance=0.05'
If the input geometry is geodetic data, this parameter is required, and arc_
tolerance must be specified. If the input geometry is Cartesian or projected data,
arc_tolerance has no effect and should not be specified.
If this parameter is not specified for a Cartesian or projected geometry, or if the
arc_tolerance keyword is specified for a geodetic geometry but the unit
keyword is not specified, the unit of measurement associated with the data is
assumed.
start_measure and end_measure can be any points on the geometric segment.
They do not have to be in any specific order. For example, start_measure and
end_measure can be 5 and 10, respectively, or 10 and 5, respectively.
Linear Referencing Subprograms 16-77