Hi,
I'm coming in late to this methodology discussion, so apologies if I am
off the mark.
So by 'center line' I'm guessing you mean a line that is always
equidistant from the polygon boundary.
I had a similar problem a few years back where I had to create road
center lines from a polygon road representation for a small country.
After some experimentation on speed and efficacy, I came up with a
Python script that:
merged (dissolved) all poygons) - but you only have 1 polygon :-)
rasterised the polygon (as finely as you choose relevant to your issue)
ran r.thin
vectorised the (now) single line of cells.
ran a Douglas-Peuker style smoothing on the staircase lines
Worked like a dream for my purpose.
Maybe you could adapt this logic flow to your needs?
HTH,
Zoltan
On 2022-02-11 00:46, Allan López wrote:
Yes, it does.
Thanks a lot indeed. I am testing it.
Best,
Allan
El jue, 10 feb 2022 a la(s) 15:19, Alexis R.L. (alroyl...@gmail.com)
escribió:
As far as I know v.voronoi.skeleton in gdal is the closest thing
we have that can do this in base QGIS.
I hope this helps,
Alex
Le mer. 9 févr. 2022 à 17:57, Allan López <allos...@gmail.com> a
écrit :
Dear All, I need to calculate and display the center line of
an elongated river basin ( not the center of the main river
trunk) from a SHP.
Thank's in advance.
Allan Lopez
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=============================================
Zoltan Szecsei GPrGISc 0031
Director, 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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