Hi Listers,
I can't for the life of me work out the syntax/commands to use in the
FieldCalculator->FunctionEditor for extracting vertices.
I have a Polygon layer with Multipolygon rectangles at various rotations.
I need to extract the 4 corner points so that I can calculate (and save
in a virtual layer) lines that I can later use with "Processing->Split
with lines".
I will google for opening a new virtual layer and saving lines to it,
but if that is quick and easy then some help there would also be welcome.
Please can someone point me to a sample functions covering these
requirements, or just fill in the gaps below.
No, I'm not asking for someone to just write it for me.
Thanks in advance,
Zoltan
[Having a brain-dead day :-( ]
from qgis.core import *
from qgis.gui import *
@qgsfunction(args='auto', group='Custom', referenced_columns=[])
def zCutBox(feature, parent):
vertices =
blah blah
return vertices[0][0]
--
=============================================
Zoltan Szecsei GPrGISc 0031
Geograph (Pty) Ltd.
GIS and Photogrammetric Services
Cape Town, South Africa.
Mobile: +27-83-6004028 (Signal, not WhatsApp)
www.geograph.co.za
=============================================
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