Oracle Spatial User's Guide and Reference - InfoLab

SDO_UTIL.CONVERT_UNIT
Format
Description
Parameters
Usage Notes
SDO_UTIL.CONVERT_UNIT(
input_value IN NUMBER,
from_unit IN VARCHAR2,
to_unit IN VARCHAR2
) RETURN NUMBER;
SDO_UTIL.CONVERT_UNIT
Converts values from one angle, area, or distance unit of measure to another.
input_value
Number of units to be converted. For example, to convert 10 decimal degrees to
radians, specify 10.
from_unit
The unit of measure from which to convert the input value. Must be a value from
the SDO_UNIT column of the MDSYS.ANGLE_UNITS table (described in
Section 6.4.2), the MDSYS.SDO_AREA_UNITS table (described in Section 2.6), or
the MDSYS.SDO_DIST_UNITS table (described in Section 2.6). For example, to
convert decimal degrees to radians, specify Degree.
to_unit
The unit of measure into which to convert the input value. Must be a value from the
SDO_UNIT column of the same table used for from_unit. For example, to convert
decimal degrees to radians, specify Radian.
The value returned by this function might not be correct at an extremely high
degree of precision because of the way internal mathematical operations are
performed, especially if they involve small numbers or irrational numbers (such as
pi). For example, converting 1 decimal degree into decimal minutes results in the
value 60.0000017.
Spatial Utility Subprograms 19-9