Ramon Arrowsmith
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jrarrowsmith.bsky.social
Ramon Arrowsmith
@jrarrowsmith.bsky.social
Professor of Geology
SESE, ASU http://public.asu.edu/~arrows/
Reposted by Ramon Arrowsmith
October 16, 2025 at 9:15 PM
Reposted by Ramon Arrowsmith
Ever wondered what #lidar point clouds reveal about forests? OpenForest4D’s new guide breaks down how elevation, return number, intensity, and classification describe forest structure.
openforest4d.org/lidar-point-...
#pointcloud #laserscanning #forestry #geospatial
October 27, 2025 at 4:33 PM
Reposted by Ramon Arrowsmith
Discover how #lidar reveals the size & location of individual Ponderosa Pines at Sunset Crater, AZ! Using advanced algorithms in lidR, we map tree height and crowns in stunning detail, informing forest ecology and management.
openforest4d.org/tree-identif...

#Forestry
#RemoteSensing
#RStats
October 30, 2025 at 3:41 PM
Reposted by Ramon Arrowsmith
We created an #OpenSource automated workflow for multi-temporal #lidar processing to map forest change at scale. Generate canopy height, cover & change products critical for monitoring #wildfire impacts and ecosystem dynamics. Code and example from #Kaibab forest #AZ at github.com/OpenForest4D...
November 5, 2025 at 6:23 PM
Reposted by Ramon Arrowsmith
Very happy to share this documentary that documents some of the work of our team and our collaborators in learning more about the earthquakes of Central Asia. @jrarrowsmith.bsky.social
June 18, 2025 at 2:35 PM
How many batteries does it take to do field work in the Jemez and the Hopi Buttes? 11+4+8+3+1. Funner than the rest of the doom and gloom
May 17, 2025 at 6:33 PM
Reposted by Ramon Arrowsmith
Check out the latest updates to RiverREM, a Python package that automatically generates river REM visualizations. Recent improvements include new colormap options (including custom and cmocean palettes), more efficient CPU and RAM usage, and expanded documentation.

buff.ly/bwtP8Vs
April 9, 2025 at 4:30 PM
Reposted by Ramon Arrowsmith
2024 OpenTopography Bibliography: Every year we review the literature for publications that used OT data or resources. Since 2009, OT has enabled 1,204 peer-reviewed publications, 139 theses, 34 book sections, and 57 reports. Read more in our full blog post: opentopography.org/blog/ot-bibl...
March 6, 2025 at 4:03 PM
Reposted by Ramon Arrowsmith
Sacramento River, CA Topo-Bathymetric #lidar dataset recently added to OpenTopography. 174 river miles of high resolution aerial imagery, topography, bathymetry, and water surface elevations were collected to support hydrodynamic modeling and habitat prediction: opentopography.org/news/sacrame...
February 27, 2025 at 3:59 PM
Reposted by Ramon Arrowsmith
Explore in this interactive map of change: portal.opentopography.org/lafires

Change maps and processed #lidar DEMs used in the analysis are available here: doi.org/10.5069/G95B...

Original post-fire DEMs (courtesy of NV5 & UCSD):
Palisades: doi.org/10.5069/G9DR...
Eaton: doi.org/10.5069/G9JH...
February 11, 2025 at 3:55 PM
Reposted by Ramon Arrowsmith
Using #lidar to understand the impacts of the 2025 Palisades and Eaton Fires, Los Angeles, CA: We processed pre- & post- fire lidar data to illustrate the changes to the natural and built environments caused by these devastating fires. Blog for more info & images: opentopography.org/blog/using-l...
February 11, 2025 at 3:55 PM
New paper! Rachel Adam did a great job leading this work. Thanks to PGE and ASU for support.
Think about how we map potentially active faults.
pubs.geoscienceworld.org/gsa/geospher...
A systematic approach to mapping tectonic faults and documenting supporting geomorphology | Geosphere | GeoScienceWorld
pubs.geoscienceworld.org
January 18, 2025 at 6:33 PM
Reposted by Ramon Arrowsmith
Very cool! Our USGS 3DEP #lidar notebook can be found on our Github here: github.com/OpenTopograp...
Sun and shade across the Madison isthmus today. View NW. Lidar from USGS using Jupyter notebook from @opentopography.bsky.social. Sun position using #suntools R package; perspective view and shadows modeled with #rayshader. Needs work but I like it. Will share the script when I get around to it.
January 5, 2025 at 2:51 AM
I am intrigued by these earthquakes in the northeastern Main Ethiopian Rift. I will be there next month...
activetectonics.blogspot.com/2024/12/m4-m...
M4-M5 earthquakes in the Awash area of Ethiopia (late 2024)
There have been numerous M4-M5 earthquakes in the Awash area of Ethiopia over the last few months. This is within the Main Ethiopia Rift at ...
activetectonics.blogspot.com
December 31, 2024 at 10:48 PM
Reposted by Ramon Arrowsmith
Day three of #AGU24. If you’ve not yet said hi to the OpenTopography team please stop by booth 1108 in the exhibit hall: opentopography.org/news/opentop...
December 11, 2024 at 2:48 PM
Dinner at Cosmos Club in DC. IUGG social. A pilgrimage thinking of Powell and Pewe also.
December 11, 2024 at 4:32 AM
Rose plant in honor of my mother
December 11, 2024 at 4:30 AM