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Hi ,

 

I have 3 different attributes for buildings (roof type, wall type and age). I want to find the number of building(s) fall into every different combination of roof type, wall type and and age (e.g tile,brick,1980------>20  ). What would be easiest way to do it?

 

 

Cheers,

 

Engin
Hi Engin,

 

 

Several ways can be considered, I think that a combination of the AttributeAccumulator (Group By: roof type, wall type, age, List Name: _building) and

 

the ListElementCounter (List Attribute: _building{}) is a relatively quick solution. _element_count attribute of the output feature from the ListElementCounter will be the number of buildings of each group having same roof type, wall type and age.

 

 

Takashi
...the StatisticsCalculator transformer might be easier: Group By: roof type wall type age Attributes To Analyze: roof type, wall type or age (enough if you specify one of them)   Takashi
Hi Engin,

 

 

another approach would be the TestFilter. But here you need to set up all the test combinations...

 

 

Best regards,

 

Stefan
AttributeAccumulator and ListElementCounter worked like a magic. 

 

 

Thank you Takashi !

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