CoreandServices.book - Ocean - Schlumberger

or OSDD. Measurements and units may be added to the system, but they first must go
through acceptance into OSDD.
Units
Units Catalog
Unit
System
(English)
Unit
System
(Metric)
Unit
System
(SI)
Units
Measurements
Fig. 4-11 Units Catalog
Ocean Unit Service Interfaces
The Ocean Unit Service allows developers to present data quantities consistently across
applications. The Unit Service provides:
• Unit catalog containing unit systems including Metric and English
• Relationship measurements and base measurements
• Unit definitions with scale and offset for conversion to base units
• Unit converters
• Context that keeps track of the current unit system
The primary purpose of the unit service is to allow data to be converted between units. A
converter that operates between the two units is created and applied to the data. Data to
be converted must share the same base measurement. Dimensionless measurements
cannot be used in unit conversion.
Unit Service and Settings
When an Ocean application starts, the unit service and settings are setup by the product
family with their implementations according to the product family needs and rules. The
application may then access the service and settings through the IUnitService and
IUnitServiceSettings interfaces respectively. These interfaces provide access to the
Schlumberger Private
Ocean Services 4-201