Diagonal scale, protractor, flat Rules and triangular scale

Abstract

Diagonal scales are widely used by cartographers, surveyors and Engineers in Measuring or setting off distances upon geometrical and other drawings, maps plans etc. with correctness aimed at upto one hundredth part of milieter. Different materials are used for the anufacture of these scales such as brass and other rust proof materials.. However this cherne envisages manufacture of acrylic and brass diagonal scale etc. Protractors are used cartographers, surveyors and engineers for measurement of angle or laying out angles of iven values and checking angular work and are madeof acrylic sheets. Flat rules made of aeryic or PVC material are used by surveyors by Joiningtwo points for working on plane table in e field.