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104 Slope line
Slope lines may be drawn on the lower side of a contour line, eg. along the line of a re-entrant or in a depression. They are used only where it is necessary to clarify the direction of slope.
Line width 0.14mm, tag length 0.5mm
Slope lines may be drawn on the lower side of a contour line, eg. along the line of a re-entrant or in a depression. They are used only where it is necessary to clarify the fall of the ground.
No symbol is provided in the default.ocd symbol set. The feature may be drawn by using symbol 101 (contour). However this will give the tags round ends unless the default contour definition is altered.
A good compromise between the usual extremes of no contour tags, and, even worse, tags at even spacing, is required. To reiterate - they are used only where it is necessary to clarify the fall of the ground.
1) It is best to define a tag symbol for two reasons:-
to get the correct tag length
and to have square ended tags, the use of default symbol 101 gives a rounded end tag.
2) Define a tag using a horizontally drawn line.
This has the effect of allowing a tag to be placed by dragging along the contour, the tag is then drawn at a right angle to the contour.
3) to add a quick tag of the right length:-
select the contour,
click symbol 106 (earth bank),
click the change symbol tool to temporarily change the contour to an earth bank,
if necessary, change the direction of the new earth bank so that the tags fall downhill,
add tags as needed using the earthbank tags as guides for the correct angle and length,
click on 101, contour and change the contour back again.
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