2015 Hawaii SE Island UAS Orthomosaic

This imagery was captured September 20, 2015 for the Hawaiian Monk Seal Research Program. Unmanned Aircraft Systems (UAS) are being tested to assess their effectiveness for capturing images of seals and other wildlife. In addition to single photographs, an orthomosaic of Southeast Island was created as part of a mapping exercise over the island using an APH-22 hexacopter. The mosaic output is a GeoTIFF in WGS84 UTM Zone 1N. Mission support: Charles Littnan NOAA, Jessica Lopez Bohlander NOAA, LT Michael Marino NOAA UAS planning and flight: Kathryn Sweeney NOAA, Don LeRoi of Aerial Imaging Solutions Map compilation: Joel Stocker for AIS.

Original contact information:

Contact Org: National Oceanic and Atmospheric Administration (NOAA), National Marine Fisheries Service (NMFS), PIFSC, Hawaiian Monk Seal Program

Title: Charles Littnan, Lead Scientist

Phone: 808-725-5711

Orthomosaic image of Southeast Island in the Pearl and Hermes Atoll, Hawaii. Images captured using an APH-22 hexacopter (Mikrokopter navigation and flight controls). Flight Date: September 20, 2015. Image coverage approximately 0.2678 sq km (66.3 acres). Orthomosaic processed using Pix4DMapper by Pix4D from 181 images flown at an altitude of 120 meters. Approximate image resolution from this altitude: 2.5 cm/pixel (.98 in). The alignment is approximate, no ground control points (GCPs) were available on the island to verify or make adjustments. An estimate would be within 5 to 6 meters compared to real world coordinates. Less than one to two meters when measuring across the width of the island (relative accuracy). Overlay with existing imagery appears to show correct placement. Moving objects may show duplications.

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Users must assume responsibility to determine the usability of these data.

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Data set is not for use in litigation. While efforts have been made to ensure that these data are accurate and reliable within the state of the art, NOAA, cannot assume liability for any damages, or misrepresentations, caused by any inaccuracies in the data, or as a result of the data to be used on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty. We do request that you credit the National Oceanic and Atmospheric Administration (NOAA) when you use these photos in a report, publication, or presentation.

OS Independent

The alignment is approximate, no ground control points (GCPs) were available on the island to verify or make adjustments. An estimate would be within 5 to 6 meters compared to real world coordinates, and relative to itself 1 to 2 meters or less across the width of the island.; Quantitative Value: 5.5 meters, Test that produced the value: None

Cloud Cover: 0

The extent of image coverage is limited to the acquired flight lines which were planned to map the shoreline and therefore may not include all areas within the bounding coordinates.

Orthomosaic processed using Pix4DMapper by Pix4D from 181 images flown at an altitude of 120 meters. Approximate image resolution from this altitude: 2.5 cm/pixel (.98 in). The alignment is approximate, no ground control points (GCPs) were available on the island to verify or make adjustments. An estimate would be within 5 to 6 meters compared to real world coordinates, and relative to itself 1 to 2 meters or less across the width of the island. Overlay with existing imagery appears to show correct placement.