1922, 1924, 1927, 1928, 1929, 1930, 1931, 1932, 1933, 1934, 1935, 1936, 1937, 1938, 1939, 1940, 1941, 1942, 1943, 1945, 1947, 1948, 1949, 1950, 1951, 1952, 1955, 1956, 1958, 1959, 1960, and 1962. American Geographical Society of New York. GeoJSON index map of polygons using the OpenIndexMaps 1.0 schema. Complex geometry including inset maps (Multipolygon) and multiple editions of som... American Geographical Society of New York.
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2005. This polyline feature represents contour lines for the City of Alexandria, Virginia. .
2010. This dataset displays the topographical elevation lines above sea level in Fauquier County, VA 2010. These lines are record in 5-foot intermediate ...
2002. This dataset displays the topographical elevation lines above sea level in Prince William County. Descriptions for type codes can be found in the P...