How can you hide selected arcs in a polygon layer?
Coverages allowed the use of the $HIDDEN system variable to set certain arcs in a layer as automatically "hidden" when displayed in ArcPlot or ArcView 3.x. This worked for arcs used in polygon layers. Is there a way to do this using geodatabases in ArcGIS? I am looking for something automated (as opposed to a filter or symbol classification). In particular I am looking to hide the boundary arcs between lake and river inflow/outflow polygons. I do not have the PLTS extension.
Mapping Center Answer:
Ah, the dreaded "Closure Line" problem.
In our data models we've made this a feature type, i.e., classification as you put it. The models were predicated on deriving shorelines & closure lines from the hydro polygons, either as raw polygons or dissolved (to get rid of closure lines all together).
The only other thing I can think of is to use representations and either not define a rule for the closure lines, or set the rule to be a no-color symbol.
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