[GRASS-user] Returning to an old bug...

[Richard Chirgwin]

A while back I noted that if patching very large numbers of files, GRASS
6.3 generates frequent topo errors:

ERROR: BUG (Vect_build_sidx_from_topo): area does not exist

This can be reproduced in Spearfish:

1) Create individual points

for i in `echo "select cat from bugsites" | db.select`; do
v.extract input=$i output="bugsites_""$i" where=cat=$i; done

2) Buffer individual points
for i in `g.mlist vect pattern="bugsites_*"`; do
v.buffer input=$i output="buffer_""$i" buffer=500; done

3) Add tables to buffers
for i in `g.mlist vect pattern="buffer_*"`; do
v.db.addtable map=$i; done

4) Overlay buffers with areas
for i in `g.mlist vect pattern="buffer_*"; do
v.overlay ainput=$i binput=trn_sites output="overlay_""$i" operator=and;
done

5) Create target patch map
for i in `g.mlist vect pattern="overlay_*"`; do
v.patch -a -e input=$i output=patch --overwrite; done


Can anyone suggest solutions? It would be nice to avoid having to patch
a bunch of maps by hand to avoid the error!

Richard