dup.all returns a TRUE/FALSE vector in spite of line numbers
Ignore .swo
mapLim has a coordinate system

This allows to convert relatively easily with rgdal into utms:
Add first() and hist.int()
Good indications to regenerate ArequipaLim.img

Add projections information
Merge commit '542f805'
Merge commit 'b18a76d'
Merge commit '8e15f22'
Merge commit 'd40659e'
Restablishing commits lost after checkout to master
Merge commit 'e81af97'