Transform
The transformation phase of a Spatial ETL process allows a variety of functions; some of these are similar to standard ETL, but some are unique to spatial data.
Spatial data commonly consists of a geographic element and related attribute data; therefore Spatial ETL transformations are often described as being either geometric transformations - transformation of the geographic element - or attribute transformations - transformations of the related attribute data.
Read more about this topic: Spatial ETL
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