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Line Representation Pattern

June 10 2009 | 0 comments
Categories: Cartographic Representations

Good day!

We are trying to recreate the attached symbol using Cartographic Representations. However were having difficulty in recreating it such that it would either be longer than the actual geometry, or it does not curve smoothly when actual geometry curves.

Help anyone?

Mapping Center Answer:

This railroad symbol can be recreated as a representation rule with a stroke layer and a marker layer. Use the following settings:

Stroke layer (line):

Apply the Dashes Geometric effect to the stroke layer and define the settings (all units in millimeters):

     Pattern (pattern, gap): 4.5 .75
     Endings: No constraint
     Width: 0.125 mm
     Caps: Butt
     Joins: Round

Marker layer:

The first step is to create a new marker in the Marker Editor window:

  1. Use the Create Line tool to create a line.
  2. Copy and paste this line.
  3. Orient the lines parallel to one another; they should be offset from one another but centered horizontally about the x in the middle of the Marker Editor window.
  4. Click OK.

The new marker should look something like this:

New marker symbol

Set the size of the new marker symbol and then apply the Dashes Geometric Effect.  The settings should be:

     Pattern: 0 0.375 0.8 7.39 0.8 1.125
     Endings: No Constraint
     Size: 1.25
     Step: 10.115

You can then use control points to fine tune the behavior of the symbol around curves and corners. Your final result will look something like the image below:

Railroad representation symbol

For more information about working with control points, refer to ArcGIS Desktop Help 9.3.

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