It is Sirodiil's map with all markers: cities, taverns, Oblivion gate, caves, Daedr's statues and other important places. A thing in itself the very useful, and we spread it first of all for simplification of search of a new armor, the weapon and other things from spendthrifts in our selections. Badly one — on this map all names are written in English so in comparison with the Russian localization there can sometimes be a confusion.
P.S.: pay attention that the picture is lower — only a screenshot, the full version of a map in high-res needs to be unpacked for a start.
Simply place a map in the directory, convenient for you, and open any suitable program.