I assume you want this to be dynamic, rather than hardcoded. Are the two feature classes in any way linkable?

 

 

You could always use a FeatureMerger (or a UnconditionalFeatureMerger from the FME Store) to move the attribute from A to B, then simply do a TestFilter on B.

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don't know...let me explain once more

 

 

feature class A has an attribute Elevation 420 and STAU_ID = 1

feature class B has many features with STAU_ID = 1 and different elevations

i need from feature class B only that features which have elevation from 420 and 20m higher (440) all other features with STAU_ID = 1 which have elevations not in this filter i dont want in my process....

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An example workflow: 1) Use the FeatureMerger to merge A 's attributes (including elevation) to B features using STAU_ID as key attribute ("Join On" parameter).

 

B --> REQUESTOR A --> SUPPLIER * if B has an attribute whose name is same as A's elevation attribute, rename A's elevation attribute to not-conflict name beforehand

 

2) For every MERGED feature (i.e. B with A's attributes), calculate upper elevation  = merged A elevation + 20m. (the AttributeCreator or the ExpressionEvaluator).

 

3) Select features whose elevation in the range between merged A elevation and +20m (the Tester).

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Thank you very much

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