Oracle Spatial User's Guide and Reference - InfoLab

SDO_LRS.GEOM_SEGMENT_START_MEASURE
SDO_LRS.GEOM_SEGMENT_START_MEASURE
Format
Description
Parameters
Usage Notes
Examples
SDO_LRS.GEOM_SEGMENT_START_MEASURE(
geom_segment IN SDO_GEOMETRY
[, dim_array IN SDO_DIM_ARRAY]
) RETURN NUMBER;
Returns the start measure of a geometric segment.
geom_segment
Geometric segment whose start measure is to be returned.
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).
This function returns the start measure of geom_segment.
An exception is raised if geom_segment has an invalid geometry type or
dimensionality.
The _3D format of this function (SDO_LRS.GEOM_SEGMENT_START_MEASURE_
3D) is available. For information about _3D formats of LRS functions, see
Section 7.4.
The following example returns the start measure of the geometric segment
representing Route 1. (This example uses the definitions from the example in
Section 7.7.)
SELECT SDO_LRS.GEOM_SEGMENT_START_MEASURE(route_geometry)
FROM lrs_routes WHERE route_id = 1;
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