From publisher blurb:
This forth volume of Moleskin Maps contains ten of my Moleskin Maps, scanned and cleaned up. The maps are in PDF format, with a page devoted to the entire map and a GM Prep Page to assist in setting up the encounter or dungeon. The GM Prep Page is an excellent tool to help GMs prepare their game sessions.
The product also contains a zip file also contains a high resolution image of each of the maps so you can drop them into Fantasy Grounds, MapTool, or Roll20 to facilitate easy online game play.