[Qgis-user] Extract lines from raster

[Matt Boyd]

Hi List,
I've got a scanned map I want to extract / digitise the contours from as
lines.
The lines are all black and if I can get everything that's black into a
shapefile I'd be able toedit and assign values once there. Is there
anything in qgis that coudl do this? I had a quick look at orfeo but for
some reason the website is down today.

Thanks
Matt
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