Cambridge, MD, photographer Dave Harps mystical work will be feature on tonight's Outdoor Maryland on MPT.<br />Photo courtesy of MPT Great lineup of features on tonight's installment of Maryland Public Television's "Outdoors Maryland:" Essence of the Edge: Photographer David Harp can often be found taking photos of the beauty in the marshes along the Chesapeake. He has been doing this most of his life and with writer Tom Horton they have published several books about the bay and the "edge" -- that meandering, jagged transition where water meets land. Scraping the Bottom: In an attempt to determine how many crabs are in the bay, dredging is done in the winter when the crabs are far more "static" than in the summer and fall months. The results give a clear picture of how to set harvest limits for the following year. Chesapeake from the Bottom Up: Major efforts are underway to restore the Chesapeake. For decades, the Maryland Department of Natural Resources has been monitoring water quality in the bay to track the effectiveness of the restoration efforts.