NSBSD-NSB-USACE Shore Erosion Monitoring

First Barrow Shoreline Monitoring Data

On October 26, 2017, the North Slope Borough School District-A World Bridge – Unmanned Aircraft Systems team conducted its first shoreline erosion monitoring mission, with a short test flight for data acquisition, and first-flight testing on UAV at cold temperatures.

Mission Details

Location: Just north of Ilisagvik College. Launching Point Latitude: 71.3325, Longitude: -156.6618

QGIS NBarrow

                              Satellite Map of Location


Environmental conditions: Low-horizon sunlight, 1˚ F temperature and 7-10mph wind.

Aircraft: Unmanned Aircraft System (UAS): DJI Inspire 2 with X4S camera.

DSM and Orthomosaic Resolution 1 x GSD (Average Ground Sampling Distance):

 = 1.2 cm/pixel

Area Covered 0.0208 km2 / 2.0773 ha / 0.008 sq. mi. / 5.1357 acres

Altitude: 154 feet

GPS Satellites locked: 20

Image capture mission time: approximately 12 minutes

Dataset: 108 geolocated images (Download .zip 846 MB)

            Individual image dimensions: 4,864x3648 at 7.8 MB each

Orthorectified/GeoTif Image (generated from 108 images)

            Dimensions: 14,830x15,554 (206”x216”)

            Kind: GeoTiff

            Size: 286.4 MB Download

Orthomosaic in .jpg format (28 MB) download

NBarrow25Oct17 mosaic web


 

Example Metadate per Image

Image Metadata


Import into QGIS Software

Closeup1

Closeup 1 showing old satellite image and Geotiff overlay - new location for berm and shoreline

Closeup2

Closeup 2 showing old satellite image and Geotiff overlay - new location for berm and shoreline

Closeup3

Closeup 3 showing old satellite image and Geotiff overlay - new location for berm and shoreline


Video

North Barrow Mission Launch (Download MP4 @ 41 MB)

NBarrowLaunch


North Barrow Mission Landing (Download MP4 @ 26 MB)

NBarrowLandingWeb


Issues

The -1˚F ground temperature (unknown at 150’ altitude) pushed the range of the operating limits; while this UAS is capable of -4 degrees F, the RC controller began to lose functionality, so the UAS was landed for vehicle safety and inspection. The UAS did not acquire GPS positioning/satellite communication until it was at minimum 50 foot altitude. All data was safely captured and saved.

Two videos were recorded for archiving environmental conditions; vehicle launch and landing.


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