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Hi Calvin and list, <br>
<br>
Have you looked at the GRASS GIS v.generalize tool?
<a class="moz-txt-link-freetext" href="https://grass.osgeo.org/grass64/manuals/v.generalize.html">https://grass.osgeo.org/grass64/manuals/v.generalize.html</a><br>
<br>
The Douglas-Peucker algorithm is implemented there and I have used
that with (topologic)success recently on many touching polygons.
Should work for polylines too!<br>
<br>
Best regards,<br>
Aron<br>
<br>
<div class="moz-cite-prefix">On 01/10/2019 08:19, Tim Sutton wrote:<br>
</div>
<blockquote type="cite"
cite="mid:03148FE0-0A14-4D21-8176-F1EC4454D9D2@kartoza.com">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
Hi<br class="">
<div><br class="">
<blockquote type="cite" class="">
<div class="">On 26 Sep 2019, at 17:13, C Hamilton <<a
href="mailto:adenaculture@gmail.com" class=""
moz-do-not-send="true">adenaculture@gmail.com</a>>
wrote:</div>
<br class="Apple-interchange-newline">
<div class="">
<div dir="ltr" class="">
<div class="">Are there any geodesic QGIS algorithms that
simplify lines? "Simplify" just uses the projection
units of measure. If there isn't I thought I would add
this to the Shape Tools plugin. I could easily implement
the Douglas-Peucker algorithm using geodesic math. <br
class="">
</div>
<div class=""><br class="">
</div>
<div class="">For GPS tracks I also see a need to throw
out all points that are less than a certain distance or
less than a certain time interval. I don't see any
simplification algorithms that make use of time. Am I
just missing them?</div>
</div>
</div>
</blockquote>
<div><br class="">
</div>
<div>No I don’t think we have any time based simplifiers - would
be a great addition!</div>
<div><br class="">
</div>
<div>Regards</div>
<div><br class="">
</div>
<div>Tim</div>
<div><br class="">
</div>
<div><br class="">
</div>
<br class="">
<blockquote type="cite" class="">
<div class="">
<div dir="ltr" class="">
<div class=""><br class="">
</div>
<div class="">Thanks,</div>
<div class=""><br class="">
</div>
<div class="">Calvin<br class="">
</div>
</div>
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chair:</b><span style="font-weight:
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style="-webkit-text-stroke-color:
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class="Apple-converted-space"> </span>timlinux
on #qgis at <a
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margin: 0px; line-height: normal;
-webkit-text-stroke-color: rgb(0, 0,
0);" class=""><span
style="caret-color: rgb(102, 106,
115); color: rgb(102, 106, 115);
font-family: "Proxima
Nova", sans-serif; font-size:
14px; text-align: left;
background-color: rgb(255, 255,
255);" class="">I'd love to
connect. </span><a target="_blank"
class="t-quick-start-share-link"
href="https://calendly.com/timlinux"
style="color: rgb(0, 162, 255);
text-decoration: none; cursor:
pointer; font-family: "Proxima
Nova", sans-serif; font-size:
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moz-do-not-send="true">Here's my
calendar link</a><span
style="caret-color: rgb(102, 106,
115); color: rgb(102, 106, 115);
font-family: "Proxima
Nova", sans-serif; font-size:
14px; text-align: left;
background-color: rgb(255, 255,
255);" class=""> to make finding
time easy.</span></div>
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