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102 Index contour

ISSprOM 2019-2
102 Index contour (ISSprOM 2019-2)

Geometry: line, text.


Every fifth contour shall be drawn with a thicker line. This is an aid to the
quick assessment of height difference and the overall shape of the terrain surface. Where an index contour coincides with an area of much detail, it may be shown with symbol Contour (101).
Contour values may be included to aid assessment of large height differences.
The labels shall be orientated so that the top of the label is on the higher side of the contour. They are inserted in the index contours in positions where other detail is not obscured.


Colour: brown.