Contour interval 10 feet.;"Topography from aerial photographs by Kelsh plotter and by planetable surveys 1956-1957. Aerial photographs taken 1956."; (W 89⁰00ʹ00ʺ--W 88⁰45ʹ00ʺ/N 40⁰15ʹ00ʺ--N 40⁰00ʹ00ʺ);Relief shown by contours and spot heights.;1 map, colored;45 x 35 cm.;1:62,500