High-Precision Radiocarbon Age Calibration for Terrestrial and Marine Samples. Downloadbar von University of Washington This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it.
I recommend the book by Norman Matloff uk link, or the online intro course by Code School. I would also recommend installing Rstudio as a nice desktop environment for using R.
The lat-long box can circumscribe the site, for example a lake, or it may circumscribe a larger area in which the site lies either because the exact location of the site is not known or because the exact location is purposely kept vague.