Actually I just want to be able to keep the previous survey but be able to conduct a new survey in the same project file, using the same floor plan, and the same distance measurement (that is used to determine the scale of the floor plan). It would be nice if the previously scan locations showed up on the map as a ghost so you can get approximately the same results. Obviously it should log the new scan locations at the correct locations (i.e. where you clicked scan this time around).
It looks like the project was already created to do this because of the Zone Surveys menu at the top of the project map. I would like to be able to pick a date from that menu to see the results of the survey conducted on that date.
The idea is to have a single project document with multiple surveys so that you can see changes over time. It also saves me from manually re-importing the floor plan and measuring spots on the floor every time I need to do a new quarterly scan.