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2012 NOAA American Samoa Lidar DEM: Islands of Tutuila, Aunu'u, Ofu, Olosega, Ta'u and Rose Atoll

Metadata Updated: March 16, 2024

Light Detection and Ranging (LiDAR) data is remotely sensed high-resolution elevation data collected by an airborne collection platform. This LiDAR dataset is a survey of American Samoa including the islands of Tutuila, Aunu'u, Ofu, Olosega, Ta'u and Rose Atoll. The project area consists of approximately 75 square miles. The project design of the LiDAR data acquisition was developed to support a nominal post spacing of 1.0 meter or better (1.0 meter GSD). GMR Aerial Surveys Inc. d/b/a Photo Science, Inc. acquired 108 flight lines in 7 lifts between June 2012 and July 2012. This collection was for NOAA Office for Coastal Management (OCM). The data collection was performed with a Beechcraft King Air 90 twin engine aircraft (tail number N87E) utilizing an Optech Gemini sensor; collecting multiple return x, y, and z as well as intensity data.

The collection conditions were cloud and fog-free between the aircraft and the ground; streams must be within their banks; and low tide acquisition if at all possible.

Data voids within a single swath were avoided whenever possible. Acceptable void areas are caused by a water body; areas of low near infrared (NIR) reflectivity such as asphalt or composition roofing and where appropriately filled in by another swath. Unfortunately, during the LiDAR acquisition there were a few mountain peaks where the clouds never lifted high enough to collect LiDAR.

In order to post process the LiDAR data to meet task order specifications, Photo Science, Inc. established control points that were used to calibrate the LiDAR to known ground locations established on Tutuila. Please see the survey report for more details in the URLs section.

The dataset was developed based on a horizontal projection/datum of UTM NAD83 (PACP00), UTM Zone 2, meters. The vertical datum used during the collection, varied by island. NAVD88 (ASVD02), meters was used for the island of Tutuila (and Aunu'u). NAVD1988 (GEOID09), meters was used for the islands of Ofu, Olosega and Tau. Rose atoll was adjusted from Ellipsoid heights to a mean low water (MLW) datum (see lineage steps for details).

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources

Dates

Metadata Date February 29, 2024
Metadata Created Date November 12, 2020
Metadata Updated Date March 16, 2024
Reference Date(s) 2013-06 (publication)
Frequency Of Update unknown

Metadata Source

Harvested from NOS OCM

Graphic Preview

This graphic shows the lidar coverage for the American Samoa lidar.

Additional Metadata

Resource Type Dataset
Metadata Date February 29, 2024
Metadata Created Date November 12, 2020
Metadata Updated Date March 16, 2024
Reference Date(s) 2013-06 (publication)
Responsible Party NOAA Office for Coastal Management (Point of Contact, Custodian)
Contact Email
Guid gov.noaa.nmfs.inport:52876
Access Constraints Cite As: Office for Coastal Management, [Date of Access]: 2012 NOAA American Samoa Lidar DEM: Islands of Tutuila, Aunu'u, Ofu, Olosega, Ta'u and Rose Atoll [Data Date Range], https://www.fisheries.noaa.gov/inport/item/52876., Access Constraints: None, Use Constraints: Users should be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations., Distribution Liability: Any conclusions drawn from the analysis of this information are not the responsibility of the Office for Coastal Management or its partners.
Bbox East Long -168.132827
Bbox North Lat -14.152104
Bbox South Lat -14.564143
Bbox West Long -170.851652
Coupled Resource
Frequency Of Update unknown
Graphic Preview Description This graphic shows the lidar coverage for the American Samoa lidar.
Graphic Preview File https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/2490/supplemental/2012_NOAA_American_Samoa_Lidar.kmz
Graphic Preview Type kmz
Harvest Object Id 2803a83b-6470-4884-91c4-061e51fd1b26
Harvest Source Id c0121fd9-df15-4168-ac04-42f6e36a794d
Harvest Source Title NOS OCM
Licence NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose.
Lineage
Metadata Language eng
Metadata Type geospatial
Old Spatial {"type": "Polygon", "coordinates": [[[-170.851652, -14.564143], [-168.132827, -14.564143], [-168.132827, -14.152104], [-170.851652, -14.152104], [-170.851652, -14.564143]]]}
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True

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