[postgis-users] Midline between 2 lines in 3d space

Luca Casagrande luca.casagrande at gmail.com
Mon Mar 13 02:33:10 PST 2006

Hi to all guys!
I have got a SHP file, made of 2 lines. I need to found the middle line 
between them.
The lines are instead polylines and the z values is stored in attribute tab, 
using elevation column.
I thought about taking the left line, transform into points and store it in a 
txt file; do the same for right line and then do the average of the 
coordinates..can this be ok?
Thx for any idea

"E' molto più bello sapere qualcosa di tutto, che tutto di una cosa (Blaise 

GENTOO-GIS Development Team
jabber: casagrande at jabber.linux.it


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