gov.noaa.nmfs.inport:52497 eng UTF8 dataset Office for Coastal Management resourceProvider NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information pointOfContact 2026-04-30T00:00:00 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) 2011 Klawock Lagoon, Alaska Imagery and Benthic Habitats 2011-04-01 publication NOAA/NMFS/EDM 52497 https://www.fisheries.noaa.gov/inport/item/52497 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information https://coast.noaa.gov/dataviewer WWW:LINK-1.0-http--link Citation URL Online Resource download imageDigital The Klawock River on Alaska's Prince of Wales Island drains a 29,061 acre watershed with 132 miles of streambed habitat supporting seven salmon and trout species. Traditionally the river and lagoon supported salmon harvests exceeding 30,000 fish annually. The salmon fishery is an important economic factor and food source in the Klawock area. It is also an important cultural resource to local inhabitants. In 1964 a causeway was constructed blocking access to the lagoon from adjacent Klawock Bay. This has resulted in dramatic decreases in salmon harvests. The Nature Conservancy has lead a broad partnership to construct a culvert through the causeway thus re-establishing free passage between the river and Klawock Bay which is expected to help restore a full use of the river as spawning habitat by salmon and generally improve the quality of the lagoon. Benthic habitats in the lagoon and adjacent Klawock Bay and Klawock Harbor were mapped in spring 2011 to establish a baseline of benthic communities in the area with emphasis on eelgrass beds which are essential to the early survival of salmon fry. The habitat map will guide ongoing monitoring activities in the lagoon and form the basis of future change detection efforts. Aerial multi-spectral imagery was collected over the lagoon, bay, and harbor during the week of April 19, 2011. The mission was timed to coincide with the breaching of the causeway. The environmental considerations important to successful benthic mapping were incorporated into the mission planning. These included, imagery to be collected within 1.5 hours of a zero or negative tide, clear water conditions (no algal blooms, or sediment plumes from runoff), low winds to avoid surface waves, and sufficient solar illumination to image submerged areas. These collection parameters were defined by the Coastal Services Center prior to collection of the imagery. Despite weather and water conditions which were not ideal, imagery adequate to map most of the habitats in the lagoon was successfully collected on April 19, 2011. Eelgrass habitats did not have sufficient biomass at the time of the aerial mission to be mapped from that source so eelgrass habitats were determined by two field-digitizing processes, one in August 2010 and one in September 2011. The final hybrid map captures habitats 10m x 10m or larger and has the same positional accuracy as the source imagery. Field data to guide the mapping was supplied by several project partners. A comparison between the field data and the map shows high levels of agreement, although no traditional accuracy assessment was conducted. The data was developed to establish a baseline of benthic habitats in the lagoon and support future change detection activities. These data contribute to assessing conditions prior to opening of a new culvert between the Klawock River, the lagoon, and Klawock Bay to re-establish salmon use of the Klawock River. The focus of the mapping was on shallow water benthic habitats with particular concern for eelgrass meadows. NOAA Office for Coastal Management completed NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information pointOfContact NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information custodian asNeeded EARTH SCIENCE > SPECTRAL/ENGINEERING > INFRARED WAVELENGTHS > INFRARED IMAGERY EARTH SCIENCE > SPECTRAL/ENGINEERING > VISIBLE WAVELENGTHS > VISIBLE IMAGERY theme Global Change Master Directory (GCMD) Science Keywords 23.3 CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > TEXAS place Global Change Master Directory (GCMD) Location Keywords 23.3 CAMERAS instrument Global Change Master Directory (GCMD) Instrument Keywords 23.3 Airplane > Airplane platform Global Change Master Directory (GCMD) Platform Keywords 23.3 AK Alaska US place Geographic Names Information System ADS40 Aerial Photography Benthic Digital Orthophotography Habitat Klawock Bay Klawock Harbor Klawock Lagoon Remotely Sensed Imagery/Photos The Nature Conservancy theme DOC/NOAA/NOS/OCM > Office of Coastal Management, National Ocean Service, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2017-04-24 publication 8.5 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2026. GCMD Keywords, Version 24. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian Imagery project InPort otherRestrictions Cite As: Office for Coastal Management, [Date of Access]: 2011 Klawock Lagoon, Alaska Imagery and Benthic Habitats [Data Date Range], https://www.fisheries.noaa.gov/inport/item/52497. 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. otherRestrictions Access Constraints: None otherRestrictions Use Constraints: None otherRestrictions Distribution Liability: Users must assume responsibility to determine the usability of these data. unclassified eng; US imageryBaseMapsEarthCover Windows NT/2000 Systems, GPro/LPS, Leica ORIMA -133.105 -133.074 55.542 55.558 | Currentness: Publication Date 2011-04-19 The study area covers Klawock Lagoon, KLawock Harbor, and Klawock Bay, Borough of Juneau, Alaska. false eng false Not applicable NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information distributor https://coast.noaa.gov/dataviewer WWW:LINK-1.0-http--link https://coast.noaa.gov/dataviewer Online Resource download dataset Accuracy An independent NSSDA spatial accuracy assessment was not performed on the imagery; however, imagery from the GeoScanner system typically produces ortho-rectified products with a spatial accuracy meeting or exceeding +/- 3m of position on the group CE95. Horizontal Positional Accuracy An independent NSSDA spatial accuracy assessment was not performed on the imagery; however, imagery from the GeoScanner system typically produces ortho-rectified products with a spatial accuracy meeting or exceeding +/- 3m of position on the group CE95. Vertical Positional Accuracy None Completeness Report Minimum mapping unit for habitat polygons was 100 square meters. The study area boundary for the project was defined by TNC. Benthic habitat features were captured and classified according to the rules, conventions, and descriptions in the Statement of Work. The imagery was flown on 4/19/2011 between 9:35 and 10:24 A.M. by Geovantage Inc. The horizontal spatial accuracy of the imagery reported by the vendor is within +/- 3 meters CE95 of position on the ground. The radiometric resolution of the 4 band image composites is 12-bit. The imagery was processed to remove atmospheric effects such as haze and to highlight the spectral response of submerged areas. The imagery has some exposure variation between adjacent flight lines and between sunlit and cloud shaded areas. The 4 band imagery is provided in GeoTIFF format. The imagery was captured at a spatial resolution (pixel size) of 0.25m x 0.25m and was delivered in a Universal Transverse Mercator - Zone 8 projection using the NAD1983 datum. 2011-04-01T00:00:00 The benthic habitat map was developed through image segmentation using the Definiens Developer software. Image segments representing unique spectral and spatial features were generated from the source imagery at the XXX scale. Segments were then labeled into one of four habitat classes (coastal marsh, unconsolidated sediments, macroalgae, and eelgrass) by visual interpretation of the imagery and comparison to ground photos. Due to poor water clarity in Klawock Lagoon eelgrass habitat boundaries in the lagoon were generated by staff kayaking along the perimeter of the beds with a GPS logging their position every second. Two of these kayak-digitized polygons (one collected in August 2010 and one in September 2011) were merged to create a maximum extent of eelgrass polygon which was incorporated into the benthic habitat map. 2011-04-01T00:00:00