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Joining Polygon Boundaries Using Symbol Levels

Question asked by HealdsburgCA on Feb 8, 2013
Latest reply on Feb 12, 2013 by dbarnes-esristaff
Working with a road polygon layer I want to use the Join property/check box in Symbol Levels (http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#/Dissolving_polygon_boundaries_using_symbol_level_drawing/00s500000025000000/) to remove the outlines between like road polygons. 

In my buildings polygon layer when I open the symbol level window everything is fine and I have the check boxes available to me (see below)

[ATTACH=CONFIG]21623[/ATTACH]

However, in my roads ploy the symbol level join property is greyed out and unavailable (see below.

[ATTACH=CONFIG]21624[/ATTACH]

Both layers are feature classes in file geodatabases.  At first I thought it was due to my layer groupings, but I ungrouped my layers and I am still having this issue.  I also tried symbolizing my roads as a single layer (no categories) and this did not work either.

What could the difference be in symbolizing these two layers?  Any & all ideas are appreciated.

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