I appreciate your FYI, I didn't realize the accuracy. I understand your comment on the accuracy of to five decimal places being a meter, it's more precise than necessary. That is the Google earth readout on the lat/long of my site and my moth images all come from that one place. Its is an area on a wall that is 3-4m long. The moths do come from pretty precisely that place. What is the accuracy of three and four decimal places?

I always use four decimal places, which is good enough for distinguishing my black-lighting sites tens of meters apart. You could add a fifth, but the distances at that resolution are almost trivially small for the purposes of moth surveying, i.e. most individual moths that come to a light at a given location will come to that light if it’s less than 0.001° away.

I’d recommend setting some pins in Google Earth at 29.7975 -100.9980, 29.7976 -100.9980, 29.7975 -100.9981, 29.7976 -100.9981, etc. to get a sense of the distances involved.