Well...I don't have a dog in this fight but the mapping process requires survey-grade ground control points. While using the term "map" in a drone forum or with your chums carries no legal implication, when an architectural firm or construction company asks for a "map," they mean in the literal, legal sense. They most certainly do NOT mean "take some aerial photos and stitch them together in Pix4D." I'm just saying...
In the case of the OP, I would use the term "mosaic" or "orthophoto." This orthophoto is not intended to be used as a survey or map. There is no engineered or architectural scale and it is intended to serve as photography documentation only. The implication of a "map" implies accuracy of both location and scale. An orthophoto is just taking a bunch of photos and stitch them together in Pix4D using consumer grade GPS and/or GLONASS metadata embedded in the photos (which you will find is quite inaccurate).
Years ago, when I told my survey engineer buddy that a firm had hired my drone company to make a "map," and I replied that I COULD, he stopped me dead in my tracks, educated me, and at worst, saved me a long legal battle. At best, saved me from having egg on my face after busting my hump taking photos for days and stitching them together just to find out that my "mosaic" was a joke that NO entity would pay actual money for.
I'm just paying that information forward.
D