Topographic May Of Michigan

TOPOGRAPHIC [MAP] OF MICHIGAN

Among the papers read at the recent meeting of the Michigan Academy of Science, held at Ann Arbor, was one entitled "A Topographic Survey of Michigan." It was by Prof. Israel C. Russell, of the department of geology pf the University. Prof. Russell said that about 2,000 square miles of the upper peninsula of the state, and one quadrangle, containing 890 square miles of the lower peninsula, had been surveyed and the data obtained bad been used for the making of topographic maps for the regions. The quadrangle in the southern peninsula, known as the Ann Arbor quadrangle, takes in 800 square miles in the neighborhood of Ann Arbor and Ypsilanti. The map prepared shows the height of the land and the depth of lakes by means of contour lines. All cities, railroads, and wagon roads are correctly located. Prof. Russell estimates that a topographic survey and map of the entire state would cost between $400,000 and $500,000 and that it would require from 20 to 30 years to complete the same. The work is done by the United States geological survey, the state sharing in the expense. Topographic maps are valuable for locating railroads, electric lines, roads, drains, water reservoirs, etc.