hi Jaroslav,
about geocoding improvement, up to this moment we used a matlab function in case of need (as you point out, when the GCP is precise, the geocoding is good enough)
this is the matlab function:
set_offscoreg(handles,OffsE,OffsN)
it shifts the data OffsE meters to the West (to East if OffsE is negative)
and OffsN meters to the South (to North if OffsN is negative)
set_offscoreg(handles)
deletes the current offsets file
(otherwise, the shift is applied relatively to the existing offset file)
we will soon include it in the GUI (so you can use it also in the compiled version).
About the small area, please update your code, there are some new features. Later we can discuss more about modifying the height.
cheers