When is a data processing event an Observation?

Originator: JeremyTandy

Creation date: 20 Apr 2011


We need to define a policy identifying when a data-processing event can be considered an observation EVENT (as defined by ISO/DIS19156 O&M)

Example scenarios include:
    • When is a data processing event an O&M Observation event?
    • Is the act of deriving a new coverage from a collection of source coverages an Observation event?

Proposals & discussion


Originator: Jeremy Tandy

Date: 20 Apr 2011

Candidate discriminator: if one cannot traverse back to the source data from the derived data then the derivation event may be regarded as an O&M Observation; i.e. the derivation event must include some uni-directional transformation that creates something NEW.

Given this defnition, a executing simple aggregation or sub-setting process is NOT an Observation EVENT

Re-projection, whilst a transformation, is NOT an observation because it can be reversed by the application of the same algorithm




-- JeremyTandy - 20 Apr 2011
Topic revision: r1 - 20 Apr 2011, JeremyTandy
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