Hello Kate, I'm also an archaeologist but work mostly with 2D stone tools. First, what is your goal for the analysis? That can affect LM placement. As you move forward, you may find that sometimes the biological questions don't neatly fit the anthropological questions you are pursing. Second, can you post a picture of your pot? It is hard to understand what you are doing.
Dave Thulman On Monday, October 5, 2020 at 5:35:42 AM UTC-4 [email protected] wrote: > > Hello! > > I'm an archeology student at the University of Arizona working on my > Masters project using GM analysis, and kind of learning this on my own as I > go! My project involves analyzing ceramic vessel outlines and uses an > adjusted application of homology for non-biological specimens. > > I have been placing the landmarks in tpsDig2 and realizing that my > landmark placement may need adjustment. I am setting two landmarks each on > either side at the rim, the minimum diameter of the neck, the inflection > point of the shoulder, the maximum diameter, and one at the center of the > base. > > However, I am realizing that the minimum-diameter point is sometimes the > same as the rim, and sometimes the same as the inflection point. > > I have a few questions about how to proceed: > > 1) I know that landmarks converging on the same point isn't good for > analysis - but I don't fully understand the math why. Would someone be > willing to explain briefly? > > 2) I am also planning to use semilandmarks. I think I might delete the > minimum-diameter landmarks, and place semilandmarks along the neck curve > instead. I had already been planning on setting 10 equidistant > semilandmarks between each landmark, and I think this might better capture > the curve differences of the vessel neck. My current plan is to do this by > using the trace curve > resample curve by length function in tpsDig2. I > want to then analyze my samples in MorphoJ. Is this a good way to go about > this? > > Thank you, > > - Kate Barvick > -- You received this message because you are subscribed to the Google Groups "Morphmet" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/morphmet2/c94b8637-515a-4974-9aa4-ae65179f018fn%40googlegroups.com.
