Multi-view stereo photogrammetry offering high-resolution 3D models and orthomosaics.
![](/img/Shean_Cascades_SfM_examples_20140818_crop_sm.jpg)
We’ve been experimenting with this powerful technique since 2012, peforming surveys using:
- Unmanned Aerial Vehicles (UAVs, AKA drones)
- Manned aircraft for oblique and vertical aerial surveys (fixed wing, helicopter)
- Close-range photogrammmetry (tripod)
At the UW, we use the following multi-view stereo and SfM software:
- Pix4D
- Agisoft PhotoScan Pro
- VisualSfM
- NASA Ames Stereo Pipeline
![](/img/20171005_easton_GCP_ebee_mavic_flightlines_hs_sm.jpg)
Flightlines and shaded relief maps from October 2017 autonomous UAV SfM surveys of the Easton Glacier, Mt. Baker. Image ground sample distance (GSD) was ~4 cm, with total areal coverage of nearly 5 km^2.
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Early experiments with oblique aerial SfM surveys of Mt. Rainier, collected with Nikon D800 DSLR and Trimble GeoXH GPS
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July 2017 DEM from autonomous UAV SfM survey of the Nisqually River outside of Mount Rainier National Park
![](/img/greenland_channel_sm.jpg)