Class Name: Reference Origin

Superclass - <SEDRIS Abstract Base>

Subclasses

Definition

An instance of this DRM class specifies a location representing the origin of the SRF in which the data was represented originally. This location conveys information about how the original data was represented on the data provider's system.

Primary Page in DRM Diagram:

• 1

Secondary Pages in DRM Diagram:

Example

1. A producer's image generator is configured to understand 3D coordinates in the local (origin offset from the UTM zone origin) UTM SRF in which the environmental data is specified. However, the producer represented the data in a transmittal in the UTM SRF with the local offset removed.

   For purposes of comparison, the consumer wants to know the offset used in the original database development. This allows direct comparison of the producer and consumer systems using the respective image generators.

FAQs

Is a <Reference Origin> instance needed to properly locate the data?

No. A <Reference Origin> instance is not to be used for locating data. It is only intended to convey information about how the producer's native data is stored.

What is the purpose of a <Reference Origin> instance?

Correlation of data between consumer and producer.

Constraints

• <<Publishable Object>>

Composed of (two-way)

• one <Location> instance

Component of (two-way)

• one <Transmittal Root> instance

Inherited Field Elements

Field Elements

Notes

Fields Notes

srf_context_info

The srf_context_info field specifies the SRF within which the <Reference Origin> instance is defined.