[Proj4j] Comparison of GeoAPI, CTS and GeoTools?

[Martin Davis]

Michael,

Inspired by your work on CTS, I decided it would be worth looking at 
GeoAPI to see whether it could provide a model for the future design of 
Proj4J.  It certainly seems to be very complete and thorough. 

One question I have is:  you mentioned that GeoTools had a lot of 
classes, which made it complex to use.  Is this complexity due to 
following GeoAPI?  And if so, does that mean that there should be some 
caution around trying to follow the GeoAPI model too closely, since it 
is likely to introduce unnecessary complexity?

One change to Proj4J I do intend to make is to change the 
CoordinateSystem class to be CoordinateReferenceSystem.  This follows 
the distinction made in GeoAPI, which seems to be a good idea.  Whether 
an explict CoordinateSystem is required is another question - Proj4 
doesn't support different CSes, so maybe it's not necessary right now.

Martin

-- 
Martin Davis
Senior Technical Architect
Refractions Research, Inc.
(250) 383-3022