1970's Seagrass and Mangrove Habitats of the Salt River Bay National Historical Park and Ecological Preserve
Data Set (DS) | National Centers for Coastal Ocean Science (NCCOS)GUID: gov.noaa.nmfs.inport:39479 | Updated: October 17, 2023 | Published / External
Summary
Short Citation
National Centers for Coastal Ocean Science, 2024: 1970's Seagrass and Mangrove Habitats of the Salt River Bay National Historical Park and Ecological Preserve, https://www.fisheries.noaa.gov/inport/item/39479.
Full Citation Examples
Habitat maps were created as part of a larger ecological assessment conducted by NOAA's National Ocean Service (NOS), Biogeography Branch, for Salt River Bay National Historic Park and Ecological Preserve (National Park Service). Aerial photographs were obtained for 1971 and 1977 from the National Geodetic Survey, and were orthorectified by the Biogeography Branch. A classification scheme was set up with 20 benthic habitat types, 19 land cover types, and 13 mangrove habitat types. For this map of seagrass and mangrove habitats during the 1970's only the 3 seagrass, and 14 mangrove classification categories were used. These were mapped directly into a GIS system through visual interpretation of orthorectified aerial photographs.
Distribution Information
-
Shapefile, 0.2373046875
downloadable data
None
Not for Navigation
Controlled Theme Keywords
biota, environment, oceans
Child Items
Type | Title |
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Entity | SARI_1970s_sg_mang |
Contact Information
Point of Contact
NCCOS Scientific Data Coordinator
NCCOS.data@noaa.gov
Metadata Contact
NCCOS Scientific Data Coordinator
NCCOS.data@noaa.gov
Extents
-64.761937° W,
-64.749708° E,
17.783379° N,
17.765176° S
1971-11-20
1977-12-07
Item Identification
Title: | 1970's Seagrass and Mangrove Habitats of the Salt River Bay National Historical Park and Ecological Preserve |
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Short Name: | sari_1970s_sg_mang_met |
Status: | Completed |
Publication Date: | 2004 |
Abstract: |
Habitat maps were created as part of a larger ecological assessment conducted by NOAA's National Ocean Service (NOS), Biogeography Branch, for Salt River Bay National Historic Park and Ecological Preserve (National Park Service). Aerial photographs were obtained for 1971 and 1977 from the National Geodetic Survey, and were orthorectified by the Biogeography Branch. A classification scheme was set up with 20 benthic habitat types, 19 land cover types, and 13 mangrove habitat types. For this map of seagrass and mangrove habitats during the 1970's only the 3 seagrass, and 14 mangrove classification categories were used. These were mapped directly into a GIS system through visual interpretation of orthorectified aerial photographs. |
Purpose: |
These maps were created to support current and future monitoring and management efforts of the National Park Service (NPS) for this site, and support the programmatic objectives of the NPS service-wide Inventory and Monitoring Program. In particular, maps created from the time series of the photographs cover periods both before and after Hurricane Hugo (1989), providing insight to habitat changes that occurred following the disaster. |
Notes: |
840 |
Keywords
Theme Keywords
Thesaurus | Keyword |
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ISO 19115 Topic Category |
biota
|
ISO 19115 Topic Category |
environment
|
ISO 19115 Topic Category |
oceans
|
UNCONTROLLED | |
CoRIS Discovery Thesaurus Version 1 | Geographic Information > polygons |
CoRIS Discovery Thesaurus Version 1 | Map Images > Coral Mapping |
CoRIS Theme Thesaurus Version 1 | Coral reef > Coral reef monitoring and assessment > Remote sensing |
CoRIS Theme Thesaurus Version 1 | EARTH SCIENCE > Biosphere > Aquatic Habitat > Benthic Habitat |
CoRIS Theme Thesaurus Version 1 | EARTH SCIENCE > Biosphere > Zoology > Corals > Reef monitoring and assessment > Coral Reef Mapping > Base map > Aerial photography |
CoRIS Theme Thesaurus Version 1 | EARTH SCIENCE > Oceans > Coastal Processes > Mangroves > Monitoring > Remote Sensing |
CoRIS Theme Thesaurus Version 1 | EARTH SCIENCE > Oceans > Marine Biology > Marine Plants > Seagrass > Seagrass Monitoring > Remote Sensing |
NOS Data Explorer Topic Category | Environmental Monitoring |
NOS Data Explorer Topic Category | National Park Service |
Spatial Keywords
Thesaurus | Keyword |
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UNCONTROLLED | |
Coris Place Thesaurus Version 1 | COUNTRY/TERRITORY > United States of America > US Virgin Islands > St. Croix > St. Croix (17N064W0003) |
None | Salt River Bay |
None | Salt River Bay Historical Park and Ecological Preserve |
None | St. Croix |
None | U.S. Virgin Islands |
Physical Location
Organization: | National Centers for Coastal Ocean Science |
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City: | Silver Spring |
State/Province: | MD |
Data Set Information
Data Set Scope Code: | Data Set |
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Maintenance Frequency: | None Planned |
Data Presentation Form: | document |
Distribution Liability: |
The National Oceanic and Atmospheric Administration (NOAA) National Centers for Coastal Ocean Science (NCCOS) produced this data for Salt River Bay National Historic Park and Ecological Preserve (NPS). NCCOS Biogeography Branch does not guarantee the accuracy of the geographic features or attributes. Please see the metadata records for each data set for complete information on the source, limitations, and proper use. Disclaimer - While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty. |
Data Set Credit: | Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Branch |
Support Roles
Data Steward
Date Effective From: | 2004 |
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Date Effective To: | |
Contact (Position): | NCCOS Scientific Data Coordinator |
Email Address: | NCCOS.data@noaa.gov |
Distributor
Date Effective From: | 2004 |
---|---|
Date Effective To: | |
Contact (Position): | NCCOS Scientific Data Coordinator |
Email Address: | NCCOS.data@noaa.gov |
Metadata Contact
Date Effective From: | 2004 |
---|---|
Date Effective To: | |
Contact (Position): | NCCOS Scientific Data Coordinator |
Email Address: | NCCOS.data@noaa.gov |
Point of Contact
Date Effective From: | 2004 |
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Date Effective To: | |
Contact (Position): | NCCOS Scientific Data Coordinator |
Email Address: | NCCOS.data@noaa.gov |
Principal Investigator
Date Effective From: | 2004 |
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Date Effective To: | |
Contact (Person): | Kendall, Matt |
Email Address: | matt.kendall@noaa.gov |
Extents
Currentness Reference: | Ground Condition |
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Extent Group 1
Extent Group 1 / Geographic Area 1
W° Bound: | -64.761937 | |
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E° Bound: | -64.749708 | |
N° Bound: | 17.783379 | |
S° Bound: | 17.765176 |
Extent Group 1 / Time Frame 1
Time Frame Type: | Discrete |
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Start: | 1971-11-20 |
Extent Group 1 / Time Frame 2
Time Frame Type: | Discrete |
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Start: | 1977-12-07 |
Spatial Information
Spatial Representation
Representations Used
Vector: | Yes |
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Vector Representation 1
Complex Object Present?: | Yes |
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Complex Object Count: | 201 |
Access Information
Security Class: | Unclassified |
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Data Access Constraints: |
None |
Data Use Constraints: |
Not for Navigation |
Distribution Information
Distribution 1
Download URL: | http://coastalscience.noaa.gov/datasets/ccma/biogeo/sari/sari_1970s_sg_mang.zip |
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Distributor: | |
Description: |
downloadable data |
File Type (Deprecated): | shapefile |
Distribution Format: | Shapefile |
File Size: | 0.2373046875 |
URLs
URL 1
URL: | http://coastalscience.noaa.gov/datasets/ccma/biogeo/sari/sari_1970s_sg_mang.zip |
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URL Type: |
Online Resource
|
URL 2
URL: | http://ccma.nos.noaa.gov/products/biogeography/sari_cd/data/ |
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URL Type: |
Online Resource
|
URL 3
URL: | http://ccma.nos.noaa.gov/products/biogeography/sari_cd/index.htm |
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URL Type: |
Online Resource
|
Activity Log
Activity Log 1
Activity Date/Time: | 2013-07-24 |
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Description: |
Date that the source FGDC record was last modified. |
Activity Log 2
Activity Date/Time: | 2017-04-05 |
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Description: |
Converted from FGDC Content Standards for Digital Geospatial Metadata (version FGDC-STD-001-1998) using 'fgdc_to_inport_xml.pl' script. Contact Tyler Christensen (NOS) for details. |
Activity Log 3
Activity Date/Time: | 2017-09-13 |
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Description: |
Partial upload of Spatial Info section only. |
Activity Log 4
Activity Date/Time: | 2017-11-01 |
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Description: |
Replaced entire Lineage section to populate new Source Contribution field. |
Activity Log 5
Activity Date/Time: | 2018-02-08 |
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Description: |
Partial upload of Positional Accuracy fields only. |
Technical Environment
Description: |
Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 8.3.0.800 |
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Data Quality
Accuracy: |
Methods used to create this map were similar to those used for maps of the U.S. Virgin Islands and Puerto Rico by the same office ("Benthic Habitat Maps of Puerto Rico and the U.S. Virgin Islands", 2001). An accuracy assessment conducted for the original maps was designed to determine the accuracy of maps generated from on-screen digitizing using the ArcView Habitat Digitizer Extension. Benthic habitat maps exhibited an overall accuracy of 93.6 percent (Kappa 0.90-0.93) for on-screen digitizing.In comparison, the map described here was created from higher resolution imagery (25 microns), finer minimum mapping unit (MMU) (100 square meters), and habitat delineation occurred at a smaller image scale (1:1500). A greater number of ground truth points over more habitat types were verified for the year 2000 mapping data, in a study site of much smaller area. Ground truth points could not be taken directly to verify the 1970's data, however, year 2000 points were referenced when appropriate. Mapping methods were otherwise the identical to those used previously. Attribute accuracy was therefore presumed to be equivalent to or better than that of the previous map, although a formal assessment was not conducted on the current map directly. |
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Horizontal Positional Accuracy: |
The Minimum Mapping Unit (MMU) restriction was set to 100 square meters and digitizing was conducted at 1:1500 scale. Polygons were digitized directly from georegistered orthophotos with spatial accuracy approximately 1.0 meter. These maps represent conditions at the time the aerial photographs were obtained. When considering horizontal map accuracy, it is important to keep in mind that the ocean floor is a dynamic environment. Physical factors such as currents, erosion, and hurricanes and biological factors such as seasonal growth and die-off, affect the distribution and stability of terrestrial, mangrove and benthic habitats in this environment. |
Completeness Measure: |
Cloud Cover: 0 |
Completeness Report: |
Delineation of all habitat boundaries was conducted with the image scale at 1:1500. All polygons were digitized at this scale except when subtle habitat boundaries were not easily discernable at 1:1500 and zooming out to a more broad scale was required to place boundaries correctly. Digitizing at a uniform scale ensures that the level of detail produced by the photointerpreter is consistent throughout the project. The Minimum Mapping Unit (MMU) for identifying habitats or features was 100 square meters for visual photointerpretation. The software utilized in this project was designed to alert the photointerpreter each time a polygon was drawn smaller than the MMU. When this occurred, the photointerpreter has the choice of whether to include the polygon in the dataset or not. |
Conceptual Consistency: |
Individual color aerial photographs from 1971 and 1977 were georeferenced and mosaicked. Approximately 10-15 ground control points were used to orthorectify the mosaic. During the digitizing process, image stretches and manipulating image contrast, brightness and color balance were performed in the ArcView Image Analysis Extension to enhance features in the processed imagery. Additional, collateral information including previously completed habitat maps, NOS nautical charts, and other descriptive references dealing with benthic and coastal habitats of St. Croix were used to assist with image interpretation. Over 200 ground truth points were also checked with year 2000 imagery to verify photographic signature with habitat interpretation. Though 1970's habitats could not be directly verified in the same fashion, where appropriate, collateral information from the year 2000 points was considered during 1970's habitat deliniation.GIS topologic quality was established by executing ArcView extension routines that check for: overlapping polygons, multipart polygons, sliver polygons and void polygons. Additionally, checks for adjacent polygons with the same habitat attributes were completed. All errors were identified and corrected. This file is believed to be logically consistent. |
Lineage
Sources
ArcView Habitat Digitizer Extension v 3.1
Contact Name: | Ken Buja |
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Publish Date: | 2001-01-01 |
Extent Type: | Discrete |
Extent Start Date/Time: | 2001 |
Citation URL: | http://ccma.nos.noaa.gov/products/biogeography/digitizer/ |
Source Contribution: |
This ArcView extension was used to digitize and attribute benthic zones and habitats for Puerto Rico and the U.S. Virgin Islands. | Type of Source Media: computer program |
Benthic Habitats of Puerto Rico and the U.S. Virgin Islands
Contact Name: | Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Branch |
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Publish Date: | 2001-01-01 |
Extent Type: | Range |
Extent Start Date/Time: | 1999 |
Extent End Date/Time: | 2001 |
Citation URL: | http://ccma.nos.noaa.gov/products/biogeography/benthic/ |
Source Contribution: |
This document identifies the benthic habitat types attributed in this data set. | Source Geospatial Form: vector digital data | Type of Source Media: CD-ROM |
NGS Color Aerial Photography
Contact Name: | National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Geodetic Survey (NGS) |
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Publish Date: | 1977-11-14 |
Extent Type: | Discrete |
Extent Start Date/Time: | 1971-11-20 |
Source Contribution: |
Benthic features were interpreted and mapped from NGS aerial photos of the Salt River Bay region of aerial photographs of St. Croix, U.S.V.I. | Source Geospatial Form: remote-sensing image | Type of Source Media: aerial photography and scanned photographs |
Process Steps
Process Step 1
Description: |
Benthic habitat maps were digitized by delineating habitat boundaries from georeferenced imagery loaded into ArcView 3.2 GIS software with the Image Analysis extension and NOAA Coral Reef Habitat Digitizing extensions both activated. On-screen digitizing was conducted with the minimum mapping unit (MMU) set to 100 square meters and the image scale at 1:1500. During the digitizing process, image stretches and manipulation of image contrast, brightness and color balance were performed in the ArcView Image Analysis Extension to enhance features in the processed imagery. Additional collateral information, including previously completed habitat maps, NOS nautical charts, and other descriptive references dealing with benthic and coastal habitats of Salt River National Historic Park and Ecological Preserve was used to assist with image interpretation. A first draft map was completed and features in the imagery where uncertainties existed, due to confusing or difficult to interpret signatures, were identified for future ground validation effort. Since maps were based on historical imagery that didn't necessarily reflect current ground condition, similar signatures were identified in year 2000 aerial photographs. An ArcView GIS point theme was generated with points positioned on the features of uncertain habitat type or along transects through gradients between habitat types. The GIS points were converted to GPS waypoints, and were visited for on the ground habitat validation. Benthic habitat characterization was conducted at each site by snorkeling, free diving, or via observations from the surface where water depth and clarity permitted. Mangrove habitat characterization was conducted by driving, kayaking or hiking to points and visually identifying mangrove type and cover. GPS data was collected at each location, and site ID, depth, habitat type, and the method used to make the assessment were recorded. The ground validation data was incorporated into the second draft of each map. |
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Process Date/Time: | 2004-01-01 00:00:00 |
Child Items
Rubric scores updated every 15m
Type | Title | |
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Entity | SARI_1970s_sg_mang |
Catalog Details
Catalog Item ID: | 39479 |
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GUID: | gov.noaa.nmfs.inport:39479 |
Metadata Record Created By: | Tyler Christensen |
Metadata Record Created: | 2017-04-05 12:52+0000 |
Metadata Record Last Modified By: | SysAdmin InPortAdmin |
Metadata Record Last Modified: | 2023-10-17 16:12+0000 |
Metadata Record Published: | 2018-02-08 |
Owner Org: | NCCOS |
Metadata Publication Status: | Published Externally |
Do Not Publish?: | N |
Metadata Last Review Date: | 2018-02-08 |
Metadata Review Frequency: | 1 Year |
Metadata Next Review Date: | 2019-02-08 |