See Also...522 524 ISOM Index Man-made features index previous next
revision 01/00
523 Ruined fence
A ruined fence may be shown with a dashed line.
Colour: black.
Line width 0.14mm, line length 2.25mm, gap 0.25mm
tag length 0.5mm, spacing 2.5mm, tag angle 60º
Defined as line symbol 505.0. Can be drawn with any tool but bézier or straight line modes are preferable.
If the bézier tool is used, care must be taken as gap and tag spacing are dependant on location of nodes and handles. See bézier topic for more information.
As ISOM 2000 but line width was 0.125mm
ISOM number changed from 524 to 523.
The default definition has a gap between dashes of 0.3mm, compared with the ISOM specified 0.25mm. Variation is allowed in the specification, see the Variations in Symbols topic for details.}
The default definition also has the fence tags going in the wrong direction compared with the ISOM. The defined angle should be 120º (Mike Godfree)
See minimum dimensions but specifically - shortest dashed line: at least two dashes.
If the fence has a tight curve or sharp angle the tags tend to overlap.
The solution is to cut out the central
part of the curve and replace it with a plain black line.
Use a black 0.14mm line, the distinct cultivation boundary symbol (414) is snow not suitable (0.12mm)uitable.
Optimising junctions of dashed lines
OCAD v5: - First try adding a node at, or close to, the junction, next try the cut and reverse line tools. If the spacing is still incorrect, cut back and add an extra line at the junction, either with or without gaps.
In OCAD version 7- Use the new dash point node at the junction.
Click to go to the top of this page