Workaround duplicate segment issue
Workaround duplicate segment issue

This is a workaround for the deduplication of line segments

Currently I'm hashing a significantly rounded version of each line's
coordinates and discarding duplicates.  It would be safer to simply
accumulate a list of segments and to discard any overlapping segments.

erdc/proteus,erdc/proteus,erdc/proteus,erdc/proteus