[GRASS-user] v.patch drops boundary vector regions

[J. Brian Adams]

I am experiencing an interesting problem with v.patch  I am trying to  
patch together parcel maps from many (60) different townships into one  
large county-wide parcel map.  When done, the county-wide vector map  
drops many regions. It appears that the dropped regions are all very  
large compared to most of the parcels and they overlap the boundaries  
between townships.

If it is important, the parcels maps were imported from shapefiles.