Harvard

These maps are part of USGS Topographical Maps made since 1882. They’ve been broken down into quadrangle’s to make viewing them easier. We have digital copies of three different series for the Ayer, Massachusetts Quadrangle. The first surveyed in 1923 and 1935, and published in 1939, and then a partial revision surveyed in 1944 and printed in 1945; and then a final revision in 1950, and published in 1951. For information about these maps see Historic USGS Topographical Maps. 1939 Ayer, Massachusetts Quadrangle Historic USGS map Surveyed 1923, 1935. 1945 Ayer, Massachusetts Quadrangle Historic USGS map Surveyed 1923, 1935, and […]