This is an example of a lidar image created from the “point cloud” that shows objects’ reflectivity near the Santa Cruz Beach Boardwalk and the mouth of the San Lorenzo River.
Joshua Logan
Physical Scientist with the USGS Pacific Coastal and Marine Science Center
Science and Products
Post-Fire Sediment Research at the Pacific Coastal and Marine Science Center
Aerial imagery and structure-from-motion derived data products from a UAS survey of the debris flow at South Fork Campground, Sequoia National Park, CA
Digital elevation models (DEMs) of the beach and nearshore in Santa Cruz, California
USGS Thermal Tower Reef Camera Timestack, Papaloloa, Ofu, American Samoa
Bathymetry and Acoustic Backscatter data for Jenkinson Lake, California collected during three USGS field activities, 2022-604-FA, 2022-649-FA, and 2023-634-FA
Digital Surface Models and orthomosaic images from UAS surveys of Jenkinson Lake, El Dorado County, CA
USGS CoastCam at Isla Verde, Puerto Rico: 2018-2019 Calibration and GNSS Topography Survey Data
USGS CoastCam at Waiakāne, Moloka'i, Hawai'i: 2018 Timestack Imagery and Coordinate Data
USGS CoastCam at Waiakāne, Moloka'i, Hawai'i: 2018 Calibration and GNSS Topography Survey Data
USGS CoastCam at Tres Palmas, Rincón, Puerto Rico: Timestack Imagery and Coordinate Data
USGS CoastCam at Tres Palmas, Rincón, Puerto Rico: Calibration and GNSS Topography Survey Data
USGS CoastCam at Isla Verde, Puerto Rico: 2018-2019 Timestack Imagery and Coordinate Data
Topographic survey data and digital elevation model of Oxbow Reservoir, Placer County, California, October 2022
Colored shaded-relief bathymetric map and surrounding aerial imagery of Whiskeytown Lake, California
This is an example of a lidar image created from the “point cloud” that shows objects’ reflectivity near the Santa Cruz Beach Boardwalk and the mouth of the San Lorenzo River.

A digital still image can be overlaid onto the lidar “point cloud” data to give it a realistic 3D look.
A digital still image can be overlaid onto the lidar “point cloud” data to give it a realistic 3D look.
USGS Geographer Josh Logan sets up the lidar scanner near Capitola before the December 11, 2014 "Super Soaker" storm.
USGS Geographer Josh Logan sets up the lidar scanner near Capitola before the December 11, 2014 "Super Soaker" storm.
After dam removal on the Elwha River, the site of a previous survey had finer grained sediment. Surveyor in the distance is James Starr of the USGS Washington Water Science Center.
After dam removal on the Elwha River, the site of a previous survey had finer grained sediment. Surveyor in the distance is James Starr of the USGS Washington Water Science Center.
Lidar data collected in 2010 and 2012 showing a change in the beach profile. Spot marked by vertical arrow was about 1 meter (3 feet) higher after two years.
Lidar data collected in 2010 and 2012 showing a change in the beach profile. Spot marked by vertical arrow was about 1 meter (3 feet) higher after two years.
Post-fire sediment yield from a western Sierra Nevada watershed burned by the 2021 Caldor Fire
Post-fire sediment yield from a central California watershed: Field measurements and validation of the WEPP model
Seasonality of retreat rate of a wave-exposed marsh edge
Combining field observations and high-resolution numerical modeling to demonstrate the effect of coral reef roughness on turbulence and its implications for reef restoration design
Wave-scale observations of sediment resuspension and subsequent transport across a fringing reef flat
Observations of coastal circulation, waves, and sediment transport along West Maui, Hawaiʻi (November 2017– March 2018), and modeling effects of potential watershed restoration on decreasing sediment loads to adjacent coral reefs
Six years of fluvial response to a large dam removal on the Carmel River, California, USA
Watershed sediment yield following the 2018 Carr Fire, Whiskeytown National Recreation Area, northern California
Physicochemical controls on zones of higher coral stress where Black Band Disease occurs at Mākua Reef, Kauaʻi, Hawaiʻi
Characterizing the catastrophic 2017 Mud Creek Landslide, California, using repeat Structure-from-Motion (SfM) photogrammetry
Geomorphic evolution of a gravel‐bed river under sediment‐starved vs. sediment‐rich conditions: River response to the world's largest dam removal
River response to large‐dam removal in a Mediterranean hydroclimatic setting: Carmel River, California, USA
Agisoft Metashape/Photoscan Automated Image Alignment and Error Reduction version 2.0
Science and Products
Post-Fire Sediment Research at the Pacific Coastal and Marine Science Center
Aerial imagery and structure-from-motion derived data products from a UAS survey of the debris flow at South Fork Campground, Sequoia National Park, CA
Digital elevation models (DEMs) of the beach and nearshore in Santa Cruz, California
USGS Thermal Tower Reef Camera Timestack, Papaloloa, Ofu, American Samoa
Bathymetry and Acoustic Backscatter data for Jenkinson Lake, California collected during three USGS field activities, 2022-604-FA, 2022-649-FA, and 2023-634-FA
Digital Surface Models and orthomosaic images from UAS surveys of Jenkinson Lake, El Dorado County, CA
USGS CoastCam at Isla Verde, Puerto Rico: 2018-2019 Calibration and GNSS Topography Survey Data
USGS CoastCam at Waiakāne, Moloka'i, Hawai'i: 2018 Timestack Imagery and Coordinate Data
USGS CoastCam at Waiakāne, Moloka'i, Hawai'i: 2018 Calibration and GNSS Topography Survey Data
USGS CoastCam at Tres Palmas, Rincón, Puerto Rico: Timestack Imagery and Coordinate Data
USGS CoastCam at Tres Palmas, Rincón, Puerto Rico: Calibration and GNSS Topography Survey Data
USGS CoastCam at Isla Verde, Puerto Rico: 2018-2019 Timestack Imagery and Coordinate Data
Topographic survey data and digital elevation model of Oxbow Reservoir, Placer County, California, October 2022
Colored shaded-relief bathymetric map and surrounding aerial imagery of Whiskeytown Lake, California
This is an example of a lidar image created from the “point cloud” that shows objects’ reflectivity near the Santa Cruz Beach Boardwalk and the mouth of the San Lorenzo River.
This is an example of a lidar image created from the “point cloud” that shows objects’ reflectivity near the Santa Cruz Beach Boardwalk and the mouth of the San Lorenzo River.

A digital still image can be overlaid onto the lidar “point cloud” data to give it a realistic 3D look.
A digital still image can be overlaid onto the lidar “point cloud” data to give it a realistic 3D look.
USGS Geographer Josh Logan sets up the lidar scanner near Capitola before the December 11, 2014 "Super Soaker" storm.
USGS Geographer Josh Logan sets up the lidar scanner near Capitola before the December 11, 2014 "Super Soaker" storm.
After dam removal on the Elwha River, the site of a previous survey had finer grained sediment. Surveyor in the distance is James Starr of the USGS Washington Water Science Center.
After dam removal on the Elwha River, the site of a previous survey had finer grained sediment. Surveyor in the distance is James Starr of the USGS Washington Water Science Center.
Lidar data collected in 2010 and 2012 showing a change in the beach profile. Spot marked by vertical arrow was about 1 meter (3 feet) higher after two years.
Lidar data collected in 2010 and 2012 showing a change in the beach profile. Spot marked by vertical arrow was about 1 meter (3 feet) higher after two years.