Posted by
Gus Koehler on
URL: http://friam.383.s1.nabble.com/more-fiddling-with-Blender-and-GIS-tp521259p521275.html
A couple of thoughts on the subject. Traffic movement is obviously cyclical
but these cycles are also tied to various demographic and sociological
characteristics. Different groups of people travel the roads at different
times presenting different evacuations issues. Early morning commuters vs.
school buses, vs. people going out to party are examples. So whose already
out there vs. whose home and what will it take for them to get mobile?
Witness the same issues in New Orleans which now appear to have been tied to
age, nursing home, hospital, and poverty status. It could also be
interesting to look at the dispersion of these populations or more exactly,
relative concentrations compared to fire path projections and escape routes.
Information management could be very important too relative to telling
people when to move and where to go. Again, the social characteristics of
the crowd might be interesting. All of this suggests a kind of fire
diffusion modeling over demographic geographically delimited time flows.
You might find the UC Santa Barbara Center for Spatially Integrated Social
Sciences interesting at:
http://www.csiss.org/
Gus
Gus Koehler, Ph.D.
Principal
Time Structures
1545 University Ave.
Sacramento, CA 95825
916-564-8683, Fax: 916-564-7895
Cell: 916-716-1740
www.timestructures.com
-----Original Message-----
From:
[hidden email] [mailto:
[hidden email]] On Behalf
Of Stephen Guerin
Sent: Thursday, January 12, 2006 4:17 AM
To: Friam
Subject: [FRIAM] more fiddling with Blender and GIS
We're preparing for a project that will be an agent-based model of wildfire
evacuation planning in Santa Fe -- Primarily a wildfire model coupled to a
traffic model with agents embedded in a social network deciding whether they
should stay in their houses or evacuate.
I'm putting Blender (
http://www.blender3d.org) through its paces to see if
we can use it for the visualization (and possibly portions of the agent
and/or fire modeling).
Tonight, I tried importing Digital Elevation Models (DEM) for Los Alamos and
Santa Fe directly into Blender. Below is a Quicktime that displays 2 square
degrees between latitude 35-36N and longitude 105-107W. The movie starts in
the southwest corner (35N107W) and moves up to the northwest over the Valle
Caldera near LANL (35.5N106.5W) and then over to Santa Fe. It ends roughly
just north of Santa Fe Ski Basins looking down toward Albuquerque.
http://www.redfish.com/projects/SFWildfire/SantaFe_DEM_SRTM.movI used DEM files of type SRTM (Shuttle Radar Topography Mission) from an FTP
directory at NASA (ftp://e0srp01u.ecs.nasa.gov/srtm/)
I found a SRTM conversion script on the Blender Elysiun forum. The script is
very nicely packaged with a site, *great* documentation and a GUI in
Blender. The site is here:
http://uaraus.altervista.org/index.php?filename=en/content/categories/Blender/DE
M_importer.html. There's other scripts available to deal with other formats.
The documentation below is worth reading for more detail and it graphically
explains the data format of the SRTM file:
http://www.redfish.com/projects/SFWildfire/DEM_importer_eng_0.0.4.pdf-Steve
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