[postgis-users] polygons to linestrings

[Roxanne Reid-Bennett]

On 5/24/2014 7:04 PM, Richard Greenwood wrote:
> @Roxanne, thanks for your interest in my problem, sorry that I didn't 
> explain better. When you draw polygon layers with dashed or dotted 
> line styles they can look very bad because lines from adjacent 
> polygons are drawn over top of each other and the symbols (dots, 
> dashes, etc.) do not align. So I just want all the unique linestrings 
> so that they will only be drawn once. I want linestrings, not just 
> individual segments, for cartographic appearance and for performance. 
> And since it's just for cartography, I don't care about attributes, 
> line direction, or topology.

Aah.. Thanks for the illumination.  As I said - a lot of people - a lot 
more knowledgeable...  I am glad you found an answer.

Happy plotting...

Roxanne