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Job Description:

  • 1) Makes plaster relief-map models from which molds are prepared to produce duplicate scale models of land forms: Mixes plaster, water, and retarder in container.

  • 2) Punches holes in map's surface, using stippler or scorer so that plaster will adhere.

  • 3) Pours plaster over sea-level contour map, and spreads it evenly over surface with brush or spatula.

  • 4) Covers drainage, river, and city lines with transparent media or leaves border without plaster to preserve lines.

  • 5) Builds mound or elevation of plaster around spot elevation pins, leaving pinhead exposed.

  • 6) Observes printed lines indicating contour planes, and consults reference map to ascertain number, elevations, and shapes of contours to be built up with plaster.

  • 7) Pours and spreads plaster on contour planes of successively higher elevations.

  • 8) Fills with plaster angles formed by contour planes at two successive elevations to achieve natural and realistic surface appearance.

  • 9) Removes excess plaster and smooths surface of model with file and sandpaper.




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End Of Job Description for: "RELIEF-MAP MODELER"
DOT:   777.381-042

Job Number: 8333