Humboldt Bay, California Benthic Habitats 2009 Geoform
Office for Coastal Management
Data Set
(DS)
| ID: 47854
| Published / External
Created: 2017-11-14
|
Last Modified: 2023-05-30
Project (PRJ) | ID: 37225
ID: 47854
Data Set (DS)
* Discovery• First Pass
» Metadata Rubric
Item Identification
* » Title | Humboldt Bay, California Benthic Habitats 2009 Geoform |
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Short Name | ca_hb09-geoform_Metadata |
* Status | Completed |
Creation Date | |
Revision Date | |
• Publication Date | 2015 |
* » Abstract |
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 |
* Purpose |
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. |
Notes |
10012 |
Other Citation Details | |
• Supplemental Information |
The study area covers Arcata (North) Bay, Entrance Bay, South Bay and the Eel River Delta, Humboldt County, California. |
DOI (Digital Object Identifier) | |
DOI Registration Authority | |
DOI Issue Date |
Keywords
Theme Keywords
Thesaurus | Keyword |
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Global Change Master Directory (GCMD) Science Keywords | EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > BENTHIC |
Global Change Master Directory (GCMD) Science Keywords | EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > COASTAL |
Global Change Master Directory (GCMD) Science Keywords | EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > ESTUARY |
ISO 19115 Topic Category | environment |
None | Benthic |
None | CMECS |
None | Coastal and Marine Ecological Classification Standard |
None | Environmental Monitoring |
None | Geoform Component |
None | Habitat |
None | NOAA |
None | UC Sea Grant |
Temporal Keywords
Thesaurus | Keyword |
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* Spatial Keywords
Thesaurus | Keyword |
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Global Change Master Directory (GCMD) Location Keywords | CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > CALIFORNIA |
None | Arcata Bay |
None | California |
None | Eel River Delta |
None | Entrance Bay |
None | Humboldt Bay |
None | South Bay |
None | U.S. |
Stratum Keywords
Thesaurus | Keyword |
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Instrument Keywords
Thesaurus | Keyword |
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Platform Keywords
Thesaurus | Keyword |
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Physical Location
• » Organization | Office for Coastal Management |
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• » City | Charleston |
• » State/Province | SC |
• Country | |
• » Location Description |
Data Set Information
* Data Set Scope Code | Data Set |
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• Data Set Type | |
• Maintenance Frequency | As Needed |
Maintenance Note | |
» Data Presentation Form | Map (digital) |
• Entity Attribute Overview | |
Entity Attribute Detail Citation | |
Entity Attribute Detail URL | |
Distribution Liability |
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. |
Data Set Credit |
Support Roles
* » Support Role | Data Steward |
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* » Date Effective From | 2015 |
Date Effective To | |
Organization | NOAA Office for Coastal Management (NOAA/OCM) |
Address |
2234 South Hobson Ave Charleston, SC 29405-2413 |
Email Address | coastal.info@noaa.gov |
Phone | (843) 740-1202 |
Fax | |
Mobile | |
URL | https://coast.noaa.gov |
Business Hours | |
Contact Instructions |
* » Support Role | Distributor |
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* » Date Effective From | 2015 |
Date Effective To | |
Organization | NOAA Office for Coastal Management (NOAA/OCM) |
Address |
2234 South Hobson Ave Charleston, SC 29405-2413 |
Email Address | coastal.info@noaa.gov |
Phone | (843) 740-1202 |
Fax | |
Mobile | |
URL | https://coast.noaa.gov |
Business Hours | |
Contact Instructions |
* » Support Role | Metadata Contact |
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* » Date Effective From | 2015 |
Date Effective To | |
Organization | NOAA Office for Coastal Management (NOAA/OCM) |
Address |
2234 South Hobson Ave Charleston, SC 29405-2413 |
Email Address | coastal.info@noaa.gov |
Phone | (843) 740-1202 |
Fax | |
Mobile | |
URL | https://coast.noaa.gov |
Business Hours | |
Contact Instructions |
* » Support Role | Point of Contact |
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* » Date Effective From | 2015 |
Date Effective To | |
Organization | NOAA Office for Coastal Management (NOAA/OCM) |
Address |
2234 South Hobson Ave Charleston, SC 29405-2413 |
Email Address | coastal.info@noaa.gov |
Phone | (843) 740-1202 |
Fax | |
Mobile | |
URL | https://coast.noaa.gov |
Business Hours | |
Contact Instructions |
* » Support Role | |
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* » Contact | |
* Contact Instructions |
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* Contact Instructions |
Extents
Currentness Reference | Ground Condition |
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Extent Group 1
Extent Description |
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Extent Group 1 / Geographic Area 1
* » W° Bound | -124.391793 |
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* » E° Bound | -124.003949 |
* » N° Bound | 40.964791 |
* » S° Bound | 40.539057 |
* » Description |
Extent Group 1 / Vertical Extent
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Extent Group 1 / Time Frame 1
* » Time Frame Type | Discrete |
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* » Start | 2009-06-27 |
End | |
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Description |
Spatial Information
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Equivalent Scale Denominator | |
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Spatial Representation
Grid Representation Used? | |
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Vector Representation Used? | Yes |
Text / Table Representation Used? | |
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Video Representation Used? |
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Vector Representation
Topology Level | |
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Complex Object Present? | Yes |
Complex Object Count | 2165 |
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Reference Systems
Reference System
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Access Information
Data License | |
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Data License URL | |
Data License Statement | |
* » Security Class | Unclassified |
* Security Classification System | |
Security Handling Description | |
• Data Access Policy | |
» Data Access Procedure | |
• » Data Access Constraints |
Data is available upon request |
• Data Use Constraints |
None |
Metadata Access Constraints | |
Metadata Use Constraints |
Distribution Information
Start Date | |
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» Download URL | ftp://ftp.coast.noaa.gov/pub/benthic/Benthic_Cover_Data/CA_HumboldtBay.zip |
Distributor | |
File Name | Bulk Download |
Description |
FTP download of data files. |
File Date/Time | |
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Application Version | |
Compression | |
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» Download URL | |
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Archive Information
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URLs
URL | https://iocm.noaa.gov/cmecs |
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Name | CMECS Home Page |
URL Type | Online Resource |
File Resource Format | |
Description |
Information and resources on the CMECS standard and how to apply it |
URL | http://www.cmecscatalog.org/ |
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Name | CMECS Catalog |
URL Type | Online Resource |
File Resource Format | |
Description |
Searchable online catalog of CMECS units, descriptions, and source references |
URL | https://coast.noaa.gov/digitalcoast/ |
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Name | NOAA's Office for Coastal Management (OCM) Digital Coast Data section |
URL Type | Online Resource |
File Resource Format | |
Description |
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. |
URL | https://coast.noaa.gov/ |
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Name | NOAA's Office for Coastal Management (OCM) website |
URL Type | Online Resource |
File Resource Format | |
Description |
Information on the NOAA Office for Coastal Management (OCM) |
URL | https://coast.noaa.gov/data/Images/Collections/BenthicCover_thumbnail.jpg |
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Name | Browse Graphic |
URL Type | Browse Graphic |
File Resource Format | JPEG |
Description |
Sample of benthic cover data |
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Activity Log
Activity Time | 2017-03-30 |
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Activity Type | |
Responsible Party | |
Description |
Date that the source FGDC record was last modified. |
Activity Time | 2017-11-14 |
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Activity Type | |
Responsible Party | |
Description |
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. |
Activity Time | 2018-02-08 |
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Activity Type | |
Responsible Party | |
Description |
Partial upload of Positional Accuracy fields only. |
Activity Time | 2018-04-11 |
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Activity Type | |
Responsible Party | |
Description |
Partial upload to move data access FTP links to Distribution Info and remove broken URLs. |
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Issues
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Technical Environment
Description |
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Data Quality
Representativeness | |
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Accuracy |
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. |
Analytical Accuracy | |
Horizontal Positional Accuracy |
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. |
Vertical Positional Accuracy | |
Quantitation Limits | |
Bias | |
Comparability | |
Completeness Measure |
Cloud Cover: 0 |
Precision | |
Analytical Precision | |
Field Precision | |
Sensitivity | |
Detection Limit | |
Completeness Report |
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. |
Conceptual Consistency |
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. |
» Quality Control Procedures Employed |
Data Management
» Have Resources for Management of these Data Been Identified? | |
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» Approximate Percentage of Budget for these Data Devoted to Data Management | |
» Do these Data Comply with the Data Access Directive? | |
» Is Access to the Data Limited Based on an Approved Waiver? | |
» If Distributor (Data Hosting Service) is Needed, Please Indicate | |
» Approximate Delay Between Data Collection and Dissemination | |
» If Delay is Longer than Latency of Automated Processing, Indicate Under What Authority Data Access is Delayed |
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» Actual or Planned Long-Term Data Archive Location | |
» If World Data Center or Other, Specify | |
» If To Be Determined, Unable to Archive, or No Archiving Intended, Explain |
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» Approximate Delay Between Data Collection and Archiving | |
» How Will the Data Be Protected from Accidental or Malicious Modification or Deletion Prior to Receipt by the Archive? |
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Lineage
» Lineage Statement |
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Sources
Citation Title | 2009 Benthic Habitat DMC Imagery |
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Contact Role Type | |
Contact Type | |
Contact Name | Photo Science, Inc |
Publish Date | 2009-01-01 |
Extent Type | Discrete |
Extent Start Date/Time | 2009-06-27 |
Extent End Date/Time | |
Scale Denominator | 12000 |
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Citation URL Description | |
Source Contribution |
photographic signature for interpretation of benthic habitat data. | Type of Source Media: Digital orthophotos |
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Process Steps
Process Step Number | 1 |
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» Description |
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. |
Process Date/Time | 2010-06-09 00:00:00 |
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Process Step Number | 2 |
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» Description |
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. |
Process Date/Time | 2015-01-01 00:00:00 |
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Acquisition Information
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Platforms
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FAQs
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Related Items
Item Type | Relationship Type | Title |
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Catalog Details
Catalog Item ID | 47854 |
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Metadata Record Created By | Anne Ball |
Metadata Record Created | 2017-11-14 12:57+0000 |
Metadata Record Last Modified By | SysAdmin InPortAdmin |
» Metadata Record Last Modified | 2023-05-30 18:09+0000 |
Metadata Record Published | 2018-04-11 |
Owner Org | OCM |
Metadata Publication Status | Published Externally |
Do Not Publish? | N |
Metadata Workflow State | Published / External |
Metadata Last Review Date | 2018-04-11 |
Metadata Review Frequency | 1 Year |
Metadata Next Review Date | 2019-04-11 |
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