in line 43 I updated a thresh: v.edit --quiet map=$1 layer=1 type=line tool=break cats=$catlist coords=$coord thresh=-1,0,0
-1,0,0 is default, but its to emphasize, that this is important! Because it uses the current resolution as thresh, there will be done something wrong with near points: so resolution must be set up (grid size a third or whatever) Achim achim schrieb: >> ************** >> ## update network table with start,end point cats >> ## takes a long time!!! >> v.net -c --overwrite input=$1 operation=report > line_end_cats.txt >> while read line; do >> cat=$(echo $line | cut -d' ' -f1) >> start=$(echo $line | cut -d' ' -f2) >> end=$(echo $line | cut -d' ' -f3) >> ## update network table, line layer >> sqlite3 /home/achim/grass/sqlite_db "UPDATE $1 >> SET start=$start,end=$end WHERE cat = $cat;" >> done < line_end_cats.txt >> ++++++++++++++++++++ >> >> >> Can't you do this with v.to.db option=start / end ? Don't know if this >> is faster, though... > it would be faster, but v.to.db option=start/end just update the > coordinate (x,y). > then two double values instead of one integer will have to be compared > >> In any case, you can probably speed it up by putting all your SQL >> statements into a file and then executing sqlite on that file outside >> the loop. Database connections always create quite a lot of overhead. > right, good idea. Another possibility would be to make a table from > "v.net -c --overwrite input=$1 operation=report" and make the update > with one sql statement. ...but its just a workaround and not a final > version ;-). > > Achim > > > _______________________________________________ > grass-user mailing list > grass-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/grass-user
break_rivernetwork_correct.sh
Description: application/shellscript
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