Just a little bit more information: 

I want to rebuild the HTDP model in Java (it's written in Fortran, I had
rebuilt some parts of the model in Java though), follow GeoTools style and
reuse as much as I can the GeoTools referencing library. 

My main problem is that I am new to GeoTools. I have been reading guides,
GeoTools source codes, the OGP surveying and positioning guidance, etc.. and
found out that there are many GeoTools classes I can just borrow to build my
own tool. However, some are different, such as the BursaWolfParameters of 7
parameters and the DefaultGeodeticDatum has a bursaWolf variable. I am not
sure what will be a good practice to do:

- build new classes of my own and thus .. I imagine that I will break the
GeoTools structures. Fore example, build a HTDPParameters instead of
BursaWolfParameters, but then the BursaWolfParameters are used in
DefaultGeodeticDatum and GeocentricTranslation so these two classes will
have to rebuild with HTDPParameters.. the all the classes that use
DefaultGeodeticDatum and GeocentricTranslation..

- extend the currently available classes - how about the original
variables/methods that will not be used anymore, such as the bursaWolf
variables?

Sorry that I have dummy questions. Thanks for your time and consideration.
A.Le


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