Oracle Spatial User's Guide and Reference - InfoLab

SDO_LRS.PERCENTAGE_TO_MEASURE
Usage Notes
Examples
This function returns the measure value corresponding to this percentage of the
measure range. (The measure range is the end measure minus the start measure.)
For example, if the measure range of geom_segment is 50 and percentage is 40,
the function returns 20 (because 40% of 50 = 20).
This function performs the reverse of the SDO_LRS.MEASURE_TO_PERCENTAGE
function, which returns the percentage value that corresponds to a measure.
An exception is raised if geom_segment has an invalid geometry type or
dimensionality, or if percentage is less than 0 or greater than 100.
The following example returns the measure that is 50 percent of the measure range
of the geometric segment representing Route 1. (This example uses the definitions
from the example in Section 7.7.) The measure range of this segment is 27, and 50
percent of 27 is 13.5.
SELECT SDO_LRS.PERCENTAGE_TO_MEASURE(a.route_geometry, m.diminfo, 50)
FROM lrs_routes a, user_sdo_geom_metadata m
HERE m.table_name = 'LRS_ROUTES' AND m.column_name = 'ROUTE_GEOMETRY'
AND a.route_id = 1;
SDO_LRS.PERCENTAGE_TO_MEASURE(A.ROUTE_GEOMETRY,M.DIMINFO,50)
------------------------------------------------------------
13.5
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