2 questions

[mcclanah at dlgeo.cr.usgs.gov]

Two quick questions:
	1) (more for the grassp list, but since these messages get there
anyway ) - where in the source is the code that creates the underlying
topology for GRASS?
	2) Anyone know of any papers/texts/references to conflation (also
known as polygon overlay, vertical integration)?

All help is appreciated.
Pat McClanahan		Internet:mcclanah at dlgeo.cr.usgs.gov
EROS Data Center 		 mcclanah at edcserver1.cr.usgs.gov
Sioux Falls, SD
605-361-4607