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Feature-Based Transformers

A Feature-Based Transformer is one which processes one feature at a time,in isolation from all other features.

Some examples of Feature-Based transformers are:

• AreaCalculatorandLengthCalculator: These transformers perform calculations on only one feature at a time.The result of measuring one feature has no impact on the measurement of another.
• CenterPointReplacer: – Each "center of gravity" (geographic center) calculation is unique and independent of other features.
• 3DForcer: Each feature is given Z values to its vertices,but one at a time and without affecting the Z values of other features.

Usage Notes:

• Feature-Based Transformers don't always need to process each feature in the same way.The use of attributes for parameter values means the process can vary with the attribute - for example,using an attribute value in the3DForcerelevation parameter.
• Aggregates: Each aggregate is considered a single feature;for example the measurement of the area of a multi-polygon feature returns a single value,not the value of each component of the aggregate.

See Also:

About Group-Based Transformers