Give this link a try it is the ny dec interactive mapping system, pretty much just zoom in by clicking your mouse. You will notice there is a legend on the side with boxes checked if you uncheck the boxes that feature will disappear or if you check it like the topogaraphic box elevations will appear. Also depending where you are hunting nyc resevoir system has alot of public land open but it requires an access permint and a hunting permit.
http://www.dec.ny.gov/outdoor/45415.html