[GRASS-user] Handling database tables

Richard Chirgwin rchirgwin at ozemail.com.au
Sun Jun 17 03:51:14 EDT 2007


Two questions.

1) If I create a vector from a points file in MySQL, I end up with extra 
MySQL tables. For eg, using a points file called old_points to create a 
map of a subset called new_points, v.in.db creates a new table (called 
new_points).

I can go back with v.db.connect and link the new vector to old_points, 
then drop the new_points table, but this seems inefficient.

Am I doing something wrong?

2) If I then use v.digit to create lines between the points, how do I 
ensure that the new lines are stored in the mysql table (and what column 
type/s do I need to store the lines?).

Richard Chirgwin




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