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CONTOURING (CHARACTERISTICS OF CONTOURS (HILL-HIGHER CONTOUR VALUE INSIDE,…
CONTOURING
CHARACTERISTICS OF CONTOURS
HILL-HIGHER CONTOUR VALUE INSIDE
DEPRESSION- LOWER CONTOUR VALUE INSIDE
PLANE SURFACE- STRAIGHT PARALLEL, EQUALLY SPACED
CONTOUR LINES CROSS RIDGE (or) VALLEY AT RIGHT ANGLE
UNFORM SLOPE-UNIFORMLY PLACED CONTOUR
RIDGE - HIGHER VALUES INSIDE THE BEND
STEEP SLOP- CONTOUR RUNCLOSE
VALLEY-HIGHER VALUES OUTSIDE THE BEND
FLAT GROUND WIDELY SEPERATED CONTOUR
OVERHANGING CLIFF- COUNTOUR LINES MERGE
ALL POINTS HAVE SAME ELEVATION
VERTICAL CLIFF CONTOURS JOIN & HORIZONTAL EQUIVALENT BECOME ZERO
COMMON VALUES OF CONTOUR INTERVAL
RESERVOIRS AND TOWN PLAN 0.5m TO 2m
LOCATION SURVEY 2m TO 3m
LARGE SCALE MAP OF COUNTRY -0.2m to 0.5m
IMPORTANT TERMS
CONTOUR INTERVAL
FACTORS DEPENDING
PURPOSE & EXTENT OF SURVEY
SCALE OF MAN
NATURE OF GROUND
TIME AND EXPENSE OF WORK
HORIZONTAL EQUIVALENT