Streambank topographic lidar survey of the French Broad River near the Interstate 26 bridge located south of Asheville, NC – December 2020, Mid-Construction #1

Dates

Publication Date: 2024-07-15
Time Period: 2020-12-10

Citation

Whaling, A.R., and Little, S.A., 2024, Streambank topographic lidar survey of the French Broad River near the Interstate 26 bridge located south of Asheville, NC – December 2020, Mid-Construction #1: U.S. Geological Survey data release, https://doi.org/10.5066/P9L9GHUP.

Summary

In January 2020, the North Carolina Department of Transportation (NCDOT) began work on the Interstate 26 (I 26) highway widening project that involves a bridge crossing over the French Broad River (FBR) near Asheville, North Carolina. The U.S Geological Survey (USGS) in cooperation with the NCDOT conducted a pre-construction light detection and ranging (lidar) survey of the streambanks within a one-kilometer reach of the FBR at the bridge construction site in November 2019 (Whaling and others, 2023). In December 2020, a canoe-based repeat streambank lidar survey was collected approximately 11 months after construction began, with the purpose to monitor geomorphological changes to the streambank and inform the NCDOT of potential impacts [...]

Summary

In January 2020, the North Carolina Department of Transportation (NCDOT) began work on the Interstate 26 (I 26) highway widening project that involves a bridge crossing over the French Broad River (FBR) near Asheville, North Carolina. The U.S Geological Survey (USGS) in cooperation with the NCDOT conducted a pre-construction light detection and ranging (lidar) survey of the streambanks within a one-kilometer reach of the FBR at the bridge construction site in November 2019 (Whaling and others, 2023). In December 2020, a canoe-based repeat streambank lidar survey was collected approximately 11 months after construction began, with the purpose to monitor geomorphological changes to the streambank and inform the NCDOT of potential impacts from construction activities. The survey extended from 300 meters (m) upstream to 700 m downstream from the bridge. Two georeferenced lidar scans were collected; one of the right-descending bank and one of the left-descending bank. Three-dimensional points of the streambanks were collected with a canoe-mounted Velodyne VLP-16 laser scanner integrated with an SBG Systems Ellipse2-D inertial navigation systems (INS), which consists of dual Global Navigation Satellite Systems (GNSS) receivers and an inertial motion unit. The lidar scanner creates a “point cloud” of lidar returns and the INS computes the position and orientation of the points in three-dimensional space. The navigation solution from the INS was further improved in post processing. Ground points were identified in each point cloud with a Cloth Simulation Filter (Zhang and others, 2016) implemented in CloudCompare software (CloudCompare, 2023) and classified with code 2 (ground) according to the American Society for Photogrammetry and Remote Sensing (ASPRS) standard lidar point classes (ASPRS, 2011). Water-surface reflections were identified and classified as code 7 (low noise; ASPRS, 2011). All other points in each point cloud were classified as code 1 (unclassified; ASPRS, 2011). The left and right streambank point clouds are provided as separate LAS files, an industry-standard binary format for storing large point cloud datasets. Each LAS file is provided with position and elevation data in three dimensions in units of meters, 8-bit scaled intensity, and the classification code. The data are projected in Universal Transverse Mercator (UTM) coordinate system, zone 17 north, horizontally referenced to the North American Datum of 1983 (NGS, 2018a), 2011 realization (NAD83 2011), and vertically referenced to the North American Vertical Datum of 1988 (NAVD88; NGS, 2018b).

Contacts

Point of Contact :: Amanda R Whaling
Originator :: Amanda R Whaling, Sarina A Little
Metadata Contact :: Amanda R Whaling
Publisher :: U.S. Geological Survey
Distributor :: U.S. Geological Survey - ScienceBase
SDC Data Owner :: Lower Mississippi-Gulf Water Science Center
USGS Mission Area :: Water Resources

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streambank_lidar_202012_FBR_FA1_FDGC.xml Original FGDC Metadata	View	38.96 KB	application/fgdc+xml
crop_polygon.zip		20.7 KB	application/zip
left_streambank_202012_FBR_FA1.las		704.35 MB	application/unknown
right_streambank_202012_FBR_FA1.las		672.7 MB	application/unknown

Related External Resources

Type: Citation

Zhang W, Qi J, Wan P, Wang H, Xie D, Wang X, Yan G. An Easy-to-Use Airborne LiDAR Data Filtering Method Based on Cloth Simulation. Remote Sensing. 2016; 8(6):501. https://doi.org/10.3390/rs8060501	https://doi.org/10.3390/rs8060501
Whaling, A. R., Riley, J. W., and Wagner, D. M., 2023, Streambank topographic lidar survey of the French Broad River near the Interstate 26 bridge located south of Asheville, NC – November 2019, Pre-construction: U.S. Geological Survey data release, https://doi.org/10.5066/P9SSYIKZ	https://doi.org/10.5066/P9SSYIKZ

Type: Web Link

National Geodetic Survey, 2018a. North American Datum of 1983, accessed March 2023, at https://www.ngs.noaa.gov/datums/horizontal/north-american-datum-1983.shtml	https://www.ngs.noaa.gov/datums/horizontal/north-american-datum-1983.shtml
National Geodetic Survey, 2018b. North American Vertical Datum of 1988 (NAVD 88), accessed March 2023, at https://www.ngs.noaa.gov/datums/vertical/north-american-vertical-datum-1988.shtml	https://www.ngs.noaa.gov/datums/vertical/north-american-vertical-datum-1988.shtml
CloudCompare—User manual (ver. 2.6.1), accessed March 2023, at https://cloudcompare.org/doc/qCC/CloudCompare%20v2.6.1%20-%20User%20manual.pdf	https://cloudcompare.org/doc/qCC/CloudCompare%20v2.6.1%20-%20User%20manual.pdf
American Society for Photogrammetry & Remote Sensing, 2011, LAS SPECIFICATION VERSION 1.4: ASPRS, https://www.asprs.org/wp-content/uploads/2019/07/LAS_1_4_r15.pdf	https://www.asprs.org/wp-content/uploads/2019/07/LAS_1_4_r15.pdf

Purpose

Topographic data were collected to characterize streambank morphology in the reaches upstream and downstream from the Interstate 26 bridge crossing over the French Broad River near Asheville, North Carolina. This data release contains topographic survey data from the first data collection effort since bridge construction began. This repeat survey over the same reach of the French Broad River will allow for periodic geomorphological assessments that may be used to inform the North Carolina Department of Transportation of potential impacts from construction activities.

Streambank topographic lidar survey of the French Broad River near the Interstate 26 bridge located south of Asheville, NC – December 2020, Mid-Construction #1

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