Johan Sems [SEP] occupation
Johan Sems
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.
Biography.
Sems was born in Franeker (Friesland) in 1572 to Sem IJsbrandts and Claesgen Adriaens.
"Sems" is a patronym.
Sem IJsbrandts registered himself as a student at Leiden University. The family lived on the Marendorp Landzijde on the corner of the Lange Hooglandse Kerksteeg in Leiden
Semslinie
The Semslinie is a part of the border between the Dutch provinces of Groningen and Drenthe that runs right through the former Bourtanger Moor. The almost straight line runs from Wolfsbarge to the Huis ter Haar at Musselkanaal.
The border is slightly bent at Stadskanaal.
The slightly bent line between Musselkanaal and Stadskanaal is sometimes called "Koningsraai".
The Semslinie is named after Johan Sems.
History.
On August 3, 1614, the provinces of Groningen and Drenthe asked Johan Sems (asked by Groningen)