Hi Brock,
Perhaps the semi-automated "Raster Tracer" plugin could help?
See http://plugins.qgis.org/plugins/raster_tracer/ ,
https://github.com/mkondratyev85/raster_tracer/ and a video
demonstrating how to use it https://www.youtube.com/watch?v=D3Mh4wpSEMM
I think you need a proper raster data source for it (RGB for now) and it
probably wouldn't work on tiled raster, such as served by Base Maps. But
there might be solutions to convert a tiled base map to a GeoTIFF file ...
Or you get to the source, like the USGS topo file, which should be
available as Geotiff files.
Hope this helps a bit.
Greetings,
Andreas
Am 28.03.20 um 01:09 schrieb Brock Riedell:
Does anybody know if it is possible to extract the contour lines (say
as a shapefile) from a windowed portion of ESRI Topo (as available on
QuickMapServices)? I'm working on an minerals exploration project
with very limited topo coverage, and would far prefer to use the ESRI
contours.
Brock
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