Measuring gauge for interpreting map contour lines - has parallel lines spaced corresponding to different land inclinations

摘要

The measuring gauge for the contour lines marked on a topographical map allows the inclination of the ground features to be obtained directly by comparing the spacing of the map contour lines with parallel line spacings marked on the gauge corresponding to preset ground inclinations. The gauge may be marked with a continuously varying scale corresponding to progressively increasing ground inclinations. ADVANTAGE - Direct read-out of ground inclination.