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<p>Hi Brock,</p>
<p>Perhaps the semi-automated "Raster Tracer" plugin could help?</p>
<p>See <a href="http://plugins.qgis.org/plugins/raster_tracer/">http://plugins.qgis.org/plugins/raster_tracer/</a>
, <a href="https://github.com/mkondratyev85/raster_tracer/">https://github.com/mkondratyev85/raster_tracer/</a>
and a video demonstrating how to use it <a
href="https://www.youtube.com/watch?v=D3Mh4wpSEMM">https://www.youtube.com/watch?v=D3Mh4wpSEMM</a>
<br>
</p>
<p>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 ...</p>
<p>Or you get to the source, like the USGS topo file, which should
be available as Geotiff files.</p>
<p>Hope this helps a bit.<br>
</p>
<p>Greetings,</p>
<p>Andreas<br>
</p>
<div class="moz-cite-prefix">Am 28.03.20 um 01:09 schrieb Brock
Riedell:<br>
</div>
<blockquote type="cite"
cite="mid:b7bce7bd-f451-062a-658f-0692929a9ccb@shaw.ca">
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<tt>Does anybody know if it is possible to extract the contour
lines (say as a shapefile) </tt><tt><tt>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.<br>
<br>
Brock<br>
<br>
</tt></tt> <br>
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