Was at Gegharot today doing some magnetometry on the NW terraces. I laid out a small grid of five 25x25m blocks, with a baseline running E-W from Mapping Station 3. The grid came out looking a little funny and wasn't measuring correctly, showing errors of up to 2m when we ran the measuring tapes out for the survey, because it turns out I backsighted to the rebar base station on the citadel rather than the painting mapping station 1. The total station showed an HD backsight error of about 2m, but I couldn't understand why at the time. Anyway, I used two workers to work the transect strings and we got 4 data blocks finished by the end of the day. After downloading and creating the tifs in Surfer, and rectifying them in Arc, the data looked a little chunky. This may be to the granitic geology at Gegh, the architectural palimpsests, or the depth of the deposits (or a combination of these factors). Plus the wonky grid made it difficult to rectify. All in all, I'm going to try to reshoot the grid and redo these blocks Saturday since I'm almost done at Tsaghkahovit.