47848
Klawock Lagoon, Alaska Benthic Habitats 2011 Geoform
ak_kl11-geoform_Metadata
Data Set
Published / External
37225
Benthic
Project
Completed
2015
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 Office for Coastal Management 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 in the Lagoon did not have sufficient biomass or illumination through the water column 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 quantitative accuracy assessment was conducted.
Original contact information:
Contact Org: NOAA Office for Coastal Management
Phone: 843-740-1202
Email: coastal.info@noaa.gov
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.
10007
The study area covers Klawock Lagoon, Klawock Harbor, and Klawock Bay, Borough of Juneau, Alaska.
Theme
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > BENTHIC
Theme
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > COASTAL
Theme
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > ESTUARY
Theme
ISO 19115 Topic Category
environment
Spatial
Global Change Master Directory (GCMD) Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > ALASKA
Theme
Benthic
Theme
CMECS
Theme
Coastal and Marine Ecological Classification Standard
Theme
Environmental Monitoring
Theme
Geoform Component
Theme
Habitat
Theme
NOAA
Theme
The Nature Conservancy
Spatial
Alaska
Spatial
Klawock Bay
Spatial
Klawock Harbor
Spatial
Klawock Lagoon
Spatial
U.S.
Office for Coastal Management
Charleston
SC
Data Set
As Needed
Map (digital)
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.
49261
Geoform
Geoform
Published / External
Completed
Shallow benthic habitats CMECS 2012 geoform component polygons | Description Source: NOAA Office for Coastal Management
Converted from FGDC using 'fgdc_to_inport_xml_entity.pl' script.
1
OBJECTID
Unknown
No
No
Active
Internal feature number. | Description Source: Esri
Sequential unique whole numbers that are automatically generated.
2
SHAPE
Unknown
No
No
Active
Feature geometry. | Description Source: Esri
Coordinates defining the features.
3
CMECS_CODE
Unknown
No
No
Active
CMECS biotic unit code. | Description Source: Coastal and Marine Ecological Classification Standard, FGDC 2012
Alphanumeric code for CMECS units
4
TECTPROV
VARCHAR
No
No
Active
Tectonic Setting - Continental scale geomorphological setting of the study area. | Description Source: Coastal and Marine Ecological Classification Standard, FGDC 2012
See list of geoform tectonic province units; CMECS FGDC 2012: See definitions of geoform setting units; CMECS FGDC 2012 |
5
PHYSIOPROV
VARCHAR
No
No
Active
Physiographic Province as per the CMECS Geoform component. | Description Source: Coastal and Marine Ecological Classification Standard, FGDC 2012
See list of geoform class units; CMECS FGDC 2012: See definitions of Geoform class units; CMECS FGDC 2012 |
6
G_ORIGIN
VARCHAR
No
No
Active
Primary process by which the geoform was formed as per the Coastal and Marine Ecological Classification Standard, FGDC 2012 | Description Source: Coastal and Marine Ecological Classification Standard, FGDC 2012
See list of geoform origin units; CMECS FGDC 2012: See definitions of geoform origin units; CMECS FGDC 2012 |
7
GEOFORM
VARCHAR
No
No
Active
Geoform - Individual geomorphological and physical features which provide a context for CMECS biotic an substrate information at a variety of spatial scales. | Description Source: Coastal and Marine Ecological Classification Standard, FGDC 2012
See list of Geoform units; CMECS FGDC 2012: See definitions of Geoform units; CMECS FGDC 2012 |
8
GEOFORM_TYPE
VARCHAR
No
No
Active
More specific variant of geoform. | Description Source: Coastal and Marine Ecological Classification Standard, FGDC 2012
See list of geoform type units; CMECS FGDC 2012: See definitions of geoform type units; CMECS FGDC 2012 |
9
Shape_Length
Unknown
No
No
Active
Length of line features in meters | Description Source: Esri
Distance
10
Shape_Area
Unknown
No
No
Active
Polygon area in square meters | Description Source: Esri
Area
Data Steward
2015
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Distributor
2015
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Metadata Contact
2015
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Point of Contact
2015
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Ground Condition
-133.105445
-133.074666
55.558106
55.542561
Discrete
2011-04-19
Yes
Yes
2165
Unclassified
Data is available upon request
None
ftp://ftp.coast.noaa.gov/pub/benthic/Benthic_Cover_Data/AK_KlawockLagoon.zip
Bulk Download
FTP download of data files.
https://coast.noaa.gov/data/Images/Collections/BenthicCover_thumbnail.jpg
Browse Graphic
Browse Graphic
JPEG
Sample of benthic cover data
http://www.cmecscatalog.org/
CMECS Catalog
Online Resource
Searchable online catalog of CMECS units, descriptions, and source references
https://coast.noaa.gov/
NOAA's Office for Coastal Management (OCM) website
Online Resource
Information on the NOAA Office for Coastal Management (OCM)
https://coast.noaa.gov/digitalcoast/
NOAA's Office for Coastal Management (OCM) Digital Coast Data section
Online Resource
The website provides not only coastal data, but also the tools, training, and information needed to make these data truly useful. Content comes from many sources, all of which are vetted by NOAA.
https://iocm.noaa.gov/cmecs
CMECS Home Page
Online Resource
Information and resources on the CMECS standard and how to apply it
2017-03-30
Date that the source FGDC record was last modified.
2017-11-14
Converted from FGDC Content Standard for Digital Geospatial Metadata (version FGDC-STD-001-1998) using 'fgdc_to_inport_xml.pl' script. Contact Tyler Christensen (NOS) for details.
2018-02-08
Partial upload of Positional Accuracy fields only.
2018-04-11
Partial upload to move data access FTP links to Distribution Info and remove broken URLs.
Polygon labels and boundaries were visually inspected for delineation precision and attribute accuracy. In August 2011 a draft habitat map was reviewed by OCM staff and project partners to identify areas of error or confusion. The users did not identify any significant errors in the map. In September, TNC staff visited 59 sites in the bay and lagoon and collected field photography to refine the map and further assess its quality. These field photos were collected at pre-selected sites to confirm conditions on the ground. A hand-held GPS unit was used to ensure that the photo was taken to obtain a coordinate for the photo to ensure successful comparison to the map. In this initial assessment, X of X photos were in agreement with the draft map.
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.
Cloud Cover: 0
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.
Polygon topology present. Every polygon has a label, there are no multiple labels within polygons, there are no contiguous polygons.
2011 Benthic Habitat GeoScanner Imagery
Geovantage, Inc
2011-01-01
Discrete
2011-04-19
12000
photographic signature for interpretation of benthic habitat data. | Type of Source Media: Digital orthophotos
1
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
2
The benthic habitat map was developed through image segmentation using the Trimble eCognition Developer software. Image segments representing spectrally homogenous area in the source imagery were generated using a scale factor 20-25. A draft map was generated by classifying the image segments into one of 5 habitat classes (coastal marsh, unconsolidated sediments, unconsolidated bottom, macroalgae, and eelgrass) using the Nearest Neighbor classifier in Trimble eCognition Developer. Training data was derived through photo interpretation using available provided field information as a reference. The resulting draft map was reviewed by the project team through visual inspection and comparison to ground photos. Additional edits were made through manual labeling of the segments. 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 final benthic habitat map.
2011-10-01T00:00:00
3
The data were converted from a single ESRI polygon shapefile classified according to the System for Classifying Habitats in Estuarine and Marine Environments (SCHEME) to the Coastal and Marine Ecological Classification Standard (CMECS) 2012 format (which can be found at https://coast.noaa.gov/digitalcoast/tools/cmecs-crosswalk) which produces separate geoform, geoform, and geoform feature layers from the original input benthic habitat dataset. This geoform feature layer contains CMECS geoform component attributes where an "Equal" or "Nearly Equal" SCHEME value was present in the original data. Polygons for which no geoform information was present have been removed. No other changes to the original polygon boundaries or any other alterations of the original SCHEME data were made during this process.
2015-01-01T00:00:00
49261
Entity
Geoform
gov.noaa.nmfs.inport:47848
Anne Ball
2017-11-14T12:57:11
SysAdmin InPortAdmin
2023-05-30T18:09:28
2018-04-11
Office for Coastal Management
OCM
1002
Public
No
2018-04-11
1 Year
2019-04-11