G. M. Hopkins Company Maps, 1872-1940

This online map collection comprises 47 volumes (1,800+ plates) published by the G.M. Hopkins Company for Pittsburgh that show lot and block numbers, dimensions, street widths, names of property owners, churches, cemeteries, mills, schools, roads, railroads, lakes, ponds, rivers, and streams. These plat maps cover the greater Pittsburgh area through the years 1872 to 1940.