6th February 2014, 12:33 PM
It can be a common problem when dealing with large area excavations or very complex multilayer sites. A workaround I sometimes use is to import and geo-reference all the scans into one standalone CAD file, turning off or unloading each scan as it's imported and overlaying this with a planning grid identifying the location of each scan by it's plan number. Once they've all been imported (and turned off) I then import this into a new CAD file as a reference file and just turn on the individual scans as and when they're needed. Means once the site is digitised I can detach the scan reference without losing the geo-referencing for the images and I can have an excavation plan of the site without the clutter of the image references hogging up memory.
ShadowJack