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Johan Sems (1572 – January 1635), sometimes known as Johan Semp, was a Dutch cartographer, engineer and land surveyor. He specialized in land reclamation and the building of dikes and fortifications.
Johan Sems (1572 – January 1635), sometimes known as Johan Semp, was a Dutch cartographer, engineer and land surveyor. He specialized in land reclamation and the building of dikes and fortifications.