Hi Jesse, Martin Hi all,

I recent days I tried to schema out the main components that should be 
implemented to be able to integrate new algorithms into existing concept so 
I've spend more by reading than writing the code.  In the first phase I would 
like to produce Abstract super class for no-residual methods and its Provider 
that will be responsible for holding the MappedPosition that acts as a input 
parameters.

 I looked into the existing code and I've realized that something similar to 
what I would like to do is in NADCONTransform. The parameters of this 
transformation are URLs to files containing deltas so maybe I should use this 
concept instead of that one that was explained in proposal (to extend wkt 
syntax).  I see other way how to bring the deltas into transformation methods 
in making Parameter (extends ParameterGroup) and ParametrDesrcriptor (extends 
DefaultParameterDescriptorGroup) classes but I still didn't understand whole 
concept. I guess that this should have similar structure as MatrixParameters 
and MatrixParameterdesriptors. So please what is your opinion – should I 
make these Desriptors, all should we use the concept of NADCON Transformation?

Other topic that I was thinking about is indexing mechanism that should be use 
for storage of MappedPosition. I have seen that we have some algorithms in 
shapefile plugin but it is quit undocumented and it will be another dependency 
for referencing. Other possibility is in JTS, but this is also problem in 
unwelcome new dependency for referencing if I remember well. I know that the 
indexing issues aren't to much actual in this phase of development, but I would 
like to have comprehensive concept of what should be developed and what is 
possible to use from existing code.

Thanks for your support!

Jan.


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