47854
Humboldt Bay, California Benthic Habitats 2009 Geoform
ca_hb09-geoform_Metadata
Data Set
Published / External
37225
Benthic
Project
Completed
2015
Humboldt Bay is the largest estuary in California north of San Francisco Bay and represents a significant resource for the
north coast region. Beginning in 2007 the Office for Coastal Management began collaborating with the California SeaGrant program and
other local partners to support an ecosystem-based management (EBM) project for Humboldt Bay. One element of this project was to
develop subtidal habitat goals for the long-term management of the bay and provide a framework for conservation and management across
the land-sea interface. The imagery collection and benthic habitat delineation for Humboldt Bay were essential to the development of
subtidal goals and implementation of EBM for the region. Together, these efforts will provide important and replicable data and an
information framework for ecosystem-based coastal and marine conservation planning and implementation. 12 Bit 4 Band imagery was
collected in June,2009 within 1 hour of either side of a minus one (-1) foot tide with low turbidity,low wind,low sun angle and no cloud cover. The horizontal spatial accuracy of the imagery is within +/- 3 meters CE95 of position on the ground and was captured at a spatial resolution (pixel size) of 0.54m x 0.54m. The imagery was tiled and named according to the existing USGS digital ortho quarter quad boundaries (ex. Arcata_South_NE.tif). A small buffer (~100 m) was produced with each tile to prevent gaps in coverage. Habitat features were interpreted and digitized on screen in an ARCGIS Geodatabase 9.3 resulting in accurate and efficient 3D extraction of the data. Habitats were delineated with a high level of detail with the minimum mapping unit (MMU) being 0.01 hectares(approx.10m x 10m).
Original contact information:
Contact Org: NOAA Office for Coastal Management
Phone: 843-740-1202
Email: coastal.info@noaa.gov
The data was developed to support ecosystem based management in the Humboldt Bay region. The focus of the mapping was on shallow water benthic habitats with particular concern for eelgrass meadows.
10012
The study area covers Arcata (North) Bay, Entrance Bay, South Bay and the Eel River Delta, Humboldt County, California.
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 > CALIFORNIA
Theme
Benthic
Theme
CMECS
Theme
Coastal and Marine Ecological Classification Standard
Theme
Environmental Monitoring
Theme
Geoform Component
Theme
Habitat
Theme
NOAA
Theme
UC Sea Grant
Spatial
Arcata Bay
Spatial
California
Spatial
Eel River Delta
Spatial
Entrance Bay
Spatial
Humboldt Bay
Spatial
South Bay
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.
49265
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
Shape_Length
Unknown
No
No
Active
Length of line features in meters | Description Source: Esri
Distance
4
Shape_Area
Unknown
No
No
Active
Polygon area in square meters | Description Source: Esri
Area
5
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
6
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 |
7
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 |
8
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 |
9
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 |
10
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 |
11
Description
Unknown
No
No
Active
Descriptive information on geoform units | Description Source: Dewberry, Inc./NOAA Office for Coastal Management
Free text further describing geoform units or other spatial contact information
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
-124.391793
-124.003949
40.964791
40.539057
Discrete
2009-06-27
Yes
Yes
2165
Unclassified
Data is available upon request
None
ftp://ftp.coast.noaa.gov/pub/benthic/Benthic_Cover_Data/CA_HumboldtBay.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. Thematic accuracy assessment methods: The thematic accuracy of the benthic habitat data set was assessed in two phases. The first phase took place in between September 14 and 18 2009, in the same season as image acquisition but prior to any mapping having been completed. A total of 128 points were visited on this trip. The points were selected manually to ensure that both representative habitats visible in the imagery as well as areas of potential confusion. The second phase also involved field visits which took place in May 10 through 13 2010. A total of 24 points were manually selected and visited after reviewing the draft habitat map. Navigation to each field point is accomplished using the source imagery as a backdrop, a real time Wide Area Augmentation System (WAAS) enabled GPS (Garmin 76 unit), and a ruggedized field lap top PC . The PC displays the image of the area with each "target" point as well as a real time symbol display of the boat location via the GPS. This system allows navigation precisely to the "target" point. In shallow or extremely clear water or during low tides when the bottom was exposed direct observations were made from the boat. In deeper areas or areas of unclear water a towed underwater video camera with live feed to a monitor on the boat was deployed. The camera was towed long enough (~2-4 minutes) at each station to provide a complete assessment of the dominate habitat type. The "field" classes were recorded to at least the two digit SCHEME classification level and where possible to the three digit level. The field points were sorted by habitat subclass and additional points were selected through a stratified random sampling process to generate a total of 50 points per class which would support a statistically valid accuracy assessment. These points were visually interpreted by viewing the source imagery. A total of 132 points were analyzed in this way. All the points were assembled into an error matrix where the "field" classification is compared to the "map" classification of each point by category. The resulting accuracy for the Humboldt Bay benthic habitat data at the 2 digit SCHEME classification code level is 84% with a kappa coefficient of 0.793.
The positional accuracy of this data meets USGS NMAS for 1:12000 scale maps. Horizontal accuracy of the data corresponds to the positional accuracy of the aerotriangulated photography that was controlled by GPS survey control points.
Cloud Cover: 0
Minimum mapping unit for habitat polygons was 10 square meters. The study area boundaries for the project were defined by NOAA. Benthic habitat features were captured and classified according to the rules, conventions, and descriptions in the Statement of Work.
Polygon topology present. All polygons were tested for slivers. Every polygon has a label, there are no multiple labels within polygons, there are no contiguous polygons.
2009 Benthic Habitat DMC Imagery
Photo Science, Inc
2009-01-01
Discrete
2009-06-27
12000
photographic signature for interpretation of benthic habitat data. | Type of Source Media: Digital orthophotos
1
The imagery was flown on 6/27/2010 between 9:35 and 10:24 A.M. by HJW geospatial Pacific Aerial Surveys
The horizontal spatial accuracy of the imagery 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 a minimal exposure variation between adjacent flight lines.
The 4 band imagery is tiled and named according to the existing USGS digital ortho quarter quad boundaries (ex. Arcata_South_NE.tif). A small buffer (~100 m) was produced with each tile to prevent gaps in coverage. The tiles are in GeoTIFF format. An index shape file indicating the image file name, location in the final file structure and the USGS tile name is included to enable users to easily identify the location of an individual tile.
The 4 band image sets was delivered within a "Unmanaged Raster Catalog" created within the ESRI Geodatabase structure to serve as an easy method for users to access the images
The imagery was captured at a spatial resolution (pixel size) of 0.54m x 0.54m and was delivered in a Universal Transverse Mercator - Zone 10 projection using the NAD1983 datum.
2010-06-09T00:00:00
2
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
49265
Entity
Geoform
gov.noaa.nmfs.inport:47854
Anne Ball
2017-11-14T12:57:13
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