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Short Citation:
National Centers for Coastal Ocean Science, 2022: Ground Validation GPS for American Samoa, https://www.fisheries.noaa.gov/inport/item/39248.

Item Identification

Title: Ground Validation GPS for American Samoa
Short Name: as_gv_gps
Status: Completed
Publication Date: 2004
Abstract:

This project is a cooperative effort among the National Ocean Service, National Centers for Coastal Ocean Science, Center for Coastal Monitoring and Assessment; the University of Hawaii; BAE Systems Spectral Solutions; and Analytical Laboratories of Hawaii, LLC. The goal of the work was to incorporate previously developed mapping methods to produce benthic habitat maps generated by photo interpreting georeferenced IKONOS satellite imagery. These point data were generated to conduct ground validation during map preparation.

Purpose:

The National Ocean Service is conducting research to digitally map biotic resources and coordinate a long-term monitoring program that can detect and predict change in U.S. coral reefs, and their associated habitats and biological communities. The purpose of this survey was to investigate areas of imagery where uncertainties exist on the photo interpreter's behalf during the decision making process of benthic habitat type for American Samoa.

Notes:

587

Keywords

Theme Keywords

Thesaurus Keyword
UNCONTROLLED
ISO 19115 Topic Category environment
ISO 19115 Topic Category oceans
None aquatic vegetation
None coral reef
None coralline algae
None Cover
None environmental monitoring
None habitat
None point
None reef
None Structure
None submerged
None unconsolidated sediments
None zone

Spatial Keywords

Thesaurus Keyword
UNCONTROLLED
None American Samoa
None Manua
None Tutuila
None United States

Physical Location

Organization: National Centers for Coastal Ocean Science
City: Silver Spring
State/Province: MD

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: None Planned
Data Presentation Form: vector digital data
Distribution Liability:

The National Oceanic and Atmospheric Administration (NOAA) National Centers for Coastal Ocean Science (NCCOS) produced this data CD-ROM. 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.

Support Roles

Data Steward

CC ID: 462353
Date Effective From: 2004
Date Effective To:
Contact (Position): NCCOS Scientific Data Coordinator
Email Address: NCCOS.data@noaa.gov

Distributor

CC ID: 462355
Date Effective From: 2004
Date Effective To:
Contact (Position): NCCOS Scientific Data Coordinator
Email Address: NCCOS.data@noaa.gov

Metadata Contact

CC ID: 462356
Date Effective From: 2004
Date Effective To:
Contact (Position): NCCOS Scientific Data Coordinator
Email Address: NCCOS.data@noaa.gov

Point of Contact

CC ID: 462354
Date Effective From: 2004
Date Effective To:
Contact (Position): NCCOS Scientific Data Coordinator
Email Address: NCCOS.data@noaa.gov

Principal Investigator

CC ID: 462357
Date Effective From: 2004
Date Effective To:
Contact (Person): Battista, Tim
Email Address: tim.battista@noaa.gov

Extents

Currentness Reference: Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 462360
W° Bound: -170.837376
E° Bound: -169.617408
N° Bound: -14.16458
S° Bound: -14.3385

Extent Group 1 / Time Frame 1

CC ID: 462359
Time Frame Type: Range
Start: 2002
End: 2003

Spatial Information

Spatial Representation

Representations Used

Vector: Yes

Vector Representation 1

CC ID: 584167
Point Object Present?: Yes
Point Object Count: 347

Access Information

Security Class: Unclassified
Data Access Procedure:

Contact NOAA for distribution options (see Distributor).;

Data Access Constraints:

None

Data Use Constraints:

Not for navigation

Distribution Information

Distribution 1

CC ID: 462362
Download URL: http://coastalscience.noaa.gov/datasets/ccma/biogeo/us_pac_terr/gvp/manua_gvp.zip
Distributor:
Description:

Downloadable Data

File Type: shapefile

Distribution 2

CC ID: 462361
Download URL: http://coastalscience.noaa.gov/datasets/ccma/biogeo/us_pac_terr/gvp/tutuila_gvp.zip
Distributor:
Description:

Downloadable Data

File Type: shapefile

URLs

URL 1

CC ID: 462350
URL: http://ccma.nos.noaa.gov/ecosystems/coralreef/us_pac_terr/data/gvp.aspx
URL Type:
Online Resource

URL 2

CC ID: 462351
URL: http://ccma.nos.noaa.gov/ecosystems/coralreef/us_pac_terr/data/
URL Type:
Online Resource

Activity Log

Activity Log 1

CC ID: 462382
Activity Date/Time: 2014-07-09
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 462381
Activity Date/Time: 2017-04-05
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

CC ID: 584165
Activity Date/Time: 2017-09-13
Description:

Partial upload of Spatial Info section only.

Activity Log 4

CC ID: 716617
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Technical Environment

Description:

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 1; ESRI ArcCatalog 9.0.0.535

Data Quality

Accuracy:

The points in this thematic data layer were acquired by GPS data using a Trimble GeoExplorer 3 with a customized data dictionary designed to reflect the NOAA Classification Scheme for Benthic Habitats of the Pacific Islands. All habitat determinations were made in the field, recorded in the GPS data logger and seamlessly transferred to ArcView GIS using Trimble Path Finder Office Software.

Horizontal Positional Accuracy:

Point accuracy was determined by three tests producing circular RMS statistic. Point GPS data were acquired by repeated occupation of a fixed point yielding a 95% sigma RMS of 5 meters compared to the position mean. Replicate GPS positions were collected after navigating to a way point by boat yielding RMS value of 5 meters. Registered monuments were occupied and replicate positions collected yielding an RMS value of 3 meters. Thus, all point features in these ground validation data are at least 95% sigma of 5 meters.

Completeness Report:

Three hundred forty seven field positions were occupied and habitat characterization conducted for ground validation during this work. These data were included in the dataset as a GIS layer and the first draft map was edited based on this ground truth. All areas where uncertainty existed on the part of the photo interpreter during habitat delineation were investigated in the field. All data were collected and integrated into the mapped products as planned.

Conceptual Consistency:

The sites for ground validation were selected to specifically investigate habitat types and gradients ofspectral signatures. All areas where uncertainty existed on the part of the photo interpreter during habitat delineation were investigated in the field. Waypoints in these areas were generated on the georeferenced imagery. The waypoints were navigated to and occupied. The habitat was observed and GPS data collected. One hundred GPS positions were collected at one-second intervals for each survey site. The positions were averaged to obtain a single survey point. The data were post processed for differential correction. The general area was explored and, as needed, additional GPS positions were collected to mark transitions between habitat types of areas mapped at the level of the minimum mapping unit (MMU).

Lineage

Process Steps

Process Step 1

CC ID: 462348
Description:

The first draft of each benthic habitat map was generated by visual interpretation of the habitat boundaries from remote sensing imagery, and areas where habitat determination was uncertain were identified. Waypoints in these areas were generated on the geo-referenced imagery and overlaid on the draft maps in the GIS. The areas were printed and waterproofed in preparation for taking them into the field. The waypoints were navigated to and occupied using the appropriate size boats. The habitat was observed and GPS data collected. One hundred GPS positions were collected at one-second intervals for each survey site. The positions were averaged to obtain a single survey point. The data were post processed for differential correction. The general area was explored and, as needed, additional GPS positions were collected to mark transitions between habitat types of areas mapped at the level of the minimum mapping unit (MMU). The field ground validation data were overlaid on the imagery with the first draft habitat map in the GIS. The habitat polygons were edited to resolve uncertainties. These ground validation point data are provided in this thematic GIS shape file.

Process Date/Time: 2002-01-01 00:00:00

Child Items

Rubric scores updated every 15m

Rubric Score Type Title
Entity as_gv_gps_final

Catalog Details

Catalog Item ID: 39248
GUID: gov.noaa.nmfs.inport:39248
Metadata Record Created By: Tyler Christensen
Metadata Record Created: 2017-04-05 12:51+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2022-08-09 17:11+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