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Arizona/Major roads

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Elevation Editing or "Seagulling": Add Seagulling image
== Elevation Editing or "Seagulling" ==
[[File:Seagulling.png|alt=Example of Seagulling Segments|thumb|155x155px]]
Seagulling is the editing practice of changing the elevation of one segment as it crosses immediately over/under another segment. This is not necessary and does not serve any navigation purpose. Elevations are used to delineate the crossing segments so they do not create a routing problem. Instead of cutting a segment into small pieces to accommodate the elevation change, it is better to leave the entire segment at the desired elevation.
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