Between the current manipulation of the model, and the model's data itself, which ought to be totally independent of any manipulation of it. (needs a clean layer between them).
Simplistic Plan for converting the messy monolithic interface into the easy clean one:
1) Create a duplicate of the data, in the desired idealized format, and maintain both.
2) Write a conversion so that whenever the messy monolithic current version is presented without the idealized one, the idealized one is created from the messy monolith, thus converting old data to new data on the fly when it's encountered.
For example in my current work, my monolith is an ultrasound sector of say 300x400 which represents a radial (polar) sector of 70 degrees at 12CM depth. This is the image. The angle is represented by 36 lines of data and 2000 samples represent the distance from the origin (the ultrasound transducer).
So now we need to manipulate (measure with gui tools, enhance, etc...) a new image, 15CM, 90 degree angle, different dimensions, number of lines, samples,.... And all the code is broken! (the code that was created for the 300x400 70 degree 36 line 2000 sample images).
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