Hi,
I have to replace all z-values=0 with a NULL value. Unfortunetely the CoordinateReplacer doesn't accept NULL-values, even when created using a NullValueMapper before. I figured out, that it works when I replace them by the value "NaN". But I think it's not really obvious to the user and it would be better to have a NULL-Value in the rightclick-list of the Replace-field, like in the AttributeCreator for example.