Untitled - The National Map

Aerial photographs taken 1941. Field check 1942–1943. Revised 1952. Polyconic projection, Puerto Rican datum. 2000-meter grid based on Puerto Rico coordinate system. Barrio and municipality boundaries by Puerto Rican. Planning, Urbanizing, and Zoning Board. ROAD CLASSIFICATION. 4 LANE 16 LANE Light-duty.
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