<div dir="ltr">Fantastic!!!<div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Nov 15, 2023 at 1:21 PM Andreas Plesch <<a href="mailto:andreasplesch@gmail.com">andreasplesch@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Let me share a visualization of the the hundreds of earthquakes now<br>
occurring daily in Iceland, heralding a volcanic eruption expected for<br>
any day now:<br>
<br>
<a href="https://andreasplesch.github.io/earthquakes-3d/iceland/reykjanes-2023/index.html" rel="noreferrer" target="_blank">https://andreasplesch.github.io/earthquakes-3d/iceland/reykjanes-2023/index.html</a><br>
<br>
It shows current seismicity along the opening fissure.<br>
<br>
It is pure x3dom, mashing up the X3D geospatial component, gltf<br>
content, geojson processing and live data sourcing from the Icelandic<br>
Meteorological Office. The data access required a cors proxy which may<br>
not always be available but was stable during testing.<br>
<br>
A new idea was to use an existing glb of a digital elevation model<br>
draped with imagery (provided by Icelandic Institute of Natural<br>
History) in an accurately located Geolocation node which worked very<br>
well to coregister it perfectly with the earthquakes. The glb is heavy<br>
and requires a good data connection but renders well.<br>
<br>
It would be cool to have the earthquakes animate over time. It may<br>
work to assign texture coordinates based on time of occurrence and<br>
animate a texture transform. The texture would be 1d with transparent<br>
cutoffs.<br>
Let's see. The total period is 48h. The texcoord could be fractional<br>
hours. So to show the 1h of earthquakes starting at the 10h mark, the<br>
texture transform would shift by -10. Scaling can change the duration.<br>
Scaling up by 2 would show less earthquakes, so only 30 minutes. I<br>
think this could work and be fast.<br>
<br>
-Andreas<br>
<br>
-- <br>
Andreas Plesch<br>
Waltham, MA 02453<br>
<br>
<br>
_______________________________________________<br>
X3dom-users mailing list<br>
<a href="mailto:X3dom-users@lists.sourceforge.net" target="_blank">X3dom-users@lists.sourceforge.net</a><br>
<a href="https://lists.sourceforge.net/lists/listinfo/x3dom-users" rel="noreferrer" target="_blank">https://lists.sourceforge.net/lists/listinfo/x3dom-users</a><br>
</blockquote></div><br clear="all"><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr">Nicholas F. Polys, Ph.D.<br><br>Director of Visual Computing <br>Virginia Tech Research Computing <br><br>Affiliate Professor<br>Virginia Tech Department of Computer Science<br><div><a href="https://people.cs.vt.edu/~npolys/" target="_blank">https://people.cs.vt.edu/~npolys/ </a><br></div></div></div>