GRADE 9 MAPWORK - CBC Mount Edmund Geography
GRADE 9 MAPWORK
CONTOUR LINES
CONTOUR LINES
? Contour lines connect places of equal altitude
? Contour lines depict various landforms on a map
? By "reading" the contour lines we can determine what the terrain in an area looks like.
CONTOUR INTERVAL
? Contour interval: The height difference between successive contour lines.
? On 1 : 50 000 Topographic maps the contour interval is 20m.
? Contour interval: 20m
GRADUAL SLOPES
? The further apart the contour lines. The more gradual the slope.
INDEX CONTOURS
? To make it easier to read the terrain, DARK brown index contour lines are drawn on the map.
? These contour lines are always multiples of 100m
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