I may be getting there... My surveyor supplied me with a number of different files, including a comma-delimited .csv file of x-y-z data that includes Oregon State Plane northings and eastings, elevations, along with point IDs and descriptors for the type of point (edge of pavement, grass, etc.). I tried several times to import these data, but they came in all wrong until I re-ordered the columns and they came into an otherwise blank new plan in their proper spatial relationships. I could see where the points stopped around the edge of my house and shop buildings and they extended out to the property line. So, I've gotten that far, but have to figure out how to orient/locate them in a meaningful way so that I can use them to create an accurate representation of the property where my house is, and where the proposed addition will be located. The x and y values are in feet relative to a 0'-0' origin at a geodetic survey monument.
Got a ways to go before I get this right...