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Short Citation:
Office for Coastal Management, 2022: C-CAP Territory of American Samoa (Tutuila) 2003-2010 Land Cover Change Analysis, https://www.fisheries.noaa.gov/inport/item/48252.

Item Identification

Title: C-CAP Territory of American Samoa (Tutuila) 2003-2010 Land Cover Change Analysis
Short Name: 2003_2010_era_AS_Tutuila_lc_change
Status: Completed
Publication Date: 2013-08-15
Abstract:

This data set contains the 2003 and 2010 classifications of Territory of American Samoa (Tutuila) derived from high resolution imagery and were analyzed according to the Coastal Change Analysis Program (C-CAP) protocol to determine land cover. This data set which utilized 7 partial Quickbird multispectral scenes and 24 full or partial 2010 WorldView2 multispectral scenes, was analysed to detect C-CAP land cover features on Tutuila, American Samoa.

Purpose:

To improve the understanding of coastal uplands and

wetlands, and their linkages with the distribution,

abundance, and health of living marine resources.

Notes:

11479

Keywords

Theme Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > LAND SURFACE > LAND USE/LAND COVER
Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > LAND SURFACE > LAND USE/LAND COVER > LAND USE/LAND COVER CLASSIFICATION
UNCONTROLLED
Global Change Master Directory (GCMD) Instrument Keywords Earth Remote Sensing Instruments > Passive Remote Sensing > Photon/Optical Detectors > Cameras > CAMERAS
Global Change Master Directory (GCMD) Platform Keywords Aircraft > AIRCRAFT
Global Change Master Directory (GCMD) Platform Keywords Earth Observation Satellites > WORLDVIEW-2
Global Change Master Directory (GCMD) Platform Keywords Earth Observation Satellites > WORLDVIEW-3
ISO 19115 Topic Category imageryBaseMapsEarthCover
None Change Detection Analysis
None Land Cover Analysis
None Remotely Sensed Imagery/Photos

Spatial Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Location Keywords OCEAN > PACIFIC OCEAN > CENTRAL PACIFIC OCEAN > AMERICAN SAMOA
UNCONTROLLED
None American Samoa
None Coastal Zone

Physical Location

Organization: Office for Coastal Management
City: Charleston
State/Province: SC

Data Set Information

Data Set Scope Code: Data Set
Maintenance Note:

5 years

Data Presentation Form: Map (digital)
Distribution Liability:

Users must assume responsibility to determine the usability of these data.

Support Roles

Data Steward

CC ID: 626678
Date Effective From: 2013-08-15
Date Effective To:
Contact (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
URL: https://coast.noaa.gov

Distributor

CC ID: 626680
Date Effective From: 2013-08-15
Date Effective To:
Contact (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
URL: https://coast.noaa.gov

Metadata Contact

CC ID: 626681
Date Effective From: 2013-08-15
Date Effective To:
Contact (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
URL: https://coast.noaa.gov

Point of Contact

CC ID: 626679
Date Effective From: 2013-08-15
Date Effective To:
Contact (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
URL: https://coast.noaa.gov

Extents

Currentness Reference: Acquisition dates of the source Quickbird and WorldView2 Scenes

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 626684
W° Bound: -64.905956
E° Bound: -64.563847
N° Bound: 17.788029
S° Bound: 17.676339

Extent Group 1 / Time Frame 1

CC ID: 626683
Time Frame Type: Range
Start: 2003-12-15
End: 2010-03-20

Spatial Information

Spatial Representation

Representations Used

Grid: Yes

Grid Representation 1

CC ID: 626669
Dimension Count: 3
Cell Geometry: Point
Transformation Parameters Available?: No

Axis Dimension 1

Dimension Type: Row
Size: 5291

Axis Dimension 2

Dimension Type: Column
Size: 15072

Axis Dimension 3

Dimension Type: Vertical
Size: 1

Access Information

Security Class: Unclassified
Data Access Constraints:

None

Data Use Constraints:

Data set is not for use in litigation. While efforts have been

made to ensure that these data are accurate and reliable within

the state of the art, NOAA, cannot assume liability for any

damages, or misrepresentations, caused by any inaccuracies in the

data, or as a result of the data to be used on a particular

system. NOAA makes no warranty, expressed or implied, nor does

the fact of distribution constitute such a warranty.

Distribution Information

Distribution 1

CC ID: 744186
Download URL: https://coast.noaa.gov/dataviewer/#/imagery/search/where:ID=4723
Distributor:
File Name: Customized Download
Description:

Create custom data files by choosing area, map projection, file format, etc.

URLs

URL 1

CC ID: 744188
URL: https://coast.noaa.gov/htdata/raster1/landcover/bulkdownload/hires
URL Type:
Online Resource

URL 2

CC ID: 744189
URL: https://coast.noaa.gov/digitalcoast
URL Type:
Online Resource

Activity Log

Activity Log 1

CC ID: 626699
Activity Date/Time: 2017-02-10
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 626698
Activity Date/Time: 2017-11-14
Description:

Converted from FGDC (Federal Geographic Data Committee) CSDGM (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 Log 3

CC ID: 717106
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 744187
Activity Date/Time: 2018-03-13
Description:

Partial upload to move data access links to Distribution Info.

Technical Environment

Description:

Microsoft Windows XP Version 2002 Service Pack 3; ESRI ArcCatalog 9.3 Service Pack 1

Data Quality

Accuracy:

Attribute_Accuracy_Report

Horizontal Positional Accuracy:

12 meters CE90

Vertical Positional Accuracy:

There was no terrain correction in the geo-referencing

procedure.

Completeness Report:

Data does not exist for all classes.

Many classes of from-to change never occurred in Territory of American Samoa (Tutuila).

Conceptual Consistency:

Tests for logical consistency indicate that all row and column

positions in the selected latitude/longitude window contain data.

Conversion and integration with vector files indicates that all

positions are consistent with earth coordinates covering the same

area. Attribute files are logically consistent.

Lineage

Sources

C-CAP Land Cover, Territory of American Samoa, Swains.

CC ID: 626663
Contact Name: Sanborn. www.sanborn.com.
Publish Date: 2009-12-17
Extent Type: Discrete
Extent Start Date/Time: 2003-11-21
Citation URL: https://coast.noaa.gov/digitalcoast
Source Contribution:

NOAA OCM | Source Geospatial Form: remote-sensing image | Type of Source Media: DVD/CD-ROM

Process Steps

Process Step 1

CC ID: 626664
Description:

Process_Description

This dataset was created by Photoscience.

This dataset contains the classifications of 2003 imagery and 2010 imagery. It is used for change analysis between these years. The

attributes include a from-to change description category. There are

521 classes corresponding to the 625 possible from-to change combinations.

In this section of the metadata, the 2003 classification

procedure is described, then the 2010 change detection classification procedure is

described. Finally in the post-processing section, the process of combining

the maps to generate a spatial matrix of change is discussed.

Early Date (2003) Classification: This section outlines the classification procedure for the American Samoa (Tutuila) High Resolution C-CAP. Quickbird imagery used in producing this land cover product was also utilized in producing an associated impervious surfaces layer for the island. The mapping approach utilized a boundary summary and refinement procedure developed by Sanborn to leverage previous United States Forest Service mapping efforts to create the high resolution land cover data set. A calibration visit was conducted and training data was collected for classification. Non impervious features were mapped using a 0.25 acre minimum mapping unit (MMU).

This dataset was created by Sanborn (www.sanborn.com).

This version of the classification is the High Resolution Land Cover (2003) for the Island of Tutuila, American Samoa.

This section outlines the classification procedure for the Island of Tutuila, American Samoa High Resolution C-CAP. Quickbird imagery used in producing this land cover product was also utilized in producing an associated impervious surfaces layer for the island. The mapping approach utilized an object oriented approach. A calibration visit was conducted and training data was collected for classification. Non impervious features were mapped using a 0.5 acre minimum mapping unit (MMU).

Pre-processing steps:

The Quickbird mosaic utilized for this project was provided from GeoEye as an orthorectifed, georeferenced product and was consistent with the quoted 1:12000 spatial accuracy.

Field-Collected Data:

Training data was collected in the field between August 15th and 23th, 2009. Land cover observations were recorded by analysts. The referenced dataset went through a QA/QC procedure to ensure it met accuracy standards.

Classification:

Segmentation - Image segmentation was completed at multiple scales using the multispectral (2.4 m) imagery in order to group like spectral and textural objects within the imagery. For consistency, the associated impervious data set was incorporated into the segmentation layer as a boundary delimiter. Segments can share boundaries of an impervious surface, but can never overlap an impervious surface.

Automated Classification, image segments are classified using a decision tree classifier in See5 software and an iterative nearest neighbor classifier in Definiens software. Nearest neighbor training data is collected through analyst interpretation or ancillary data sets and used to calibrate the classification algorithm.

Automated Classification Refinement - Models are built to refine or reclassify land cover areas by utilizing the wealth of attribute information linked to each segment within Definiens.

Classification Edits - As with any automated or semi-automated land cover classification there are often inconsistencies in the land cover map. The final step before map finalization was to remove inaccuracies through manual segment labeling as interpreted by an analyst.

Map Finalization - Sanborn used independent reviewer's comments to further refine the land cover map.

Process Date/Time: 2013-08-15 00:00:00

Process Step 2

CC ID: 626665
Description:

Metadata imported

Process Date/Time: 2010-05-24 00:00:00

Process Step 3

CC ID: 626666
Description:

Attributes for this product are as follows:

0 Background

1 Unclassified

2 Impervious

3

4

5 Developed, Open Space

6 Cultivated Crops

7 Pasture/Hay

8 Grassland/Herbaceous

9 Deciduous Forest

10 Evergreen Forest

11 Mixed Forest

12 Scrub/Shrub

13 Palustrine Forested Wetland

14 Palustrine Scrub/Shrub Wetland

15 Palustrine Emergent Wetland

16 Estuarine Forested Wetland

17 Estuarine Scrub/Shrub Wetland

18 Estuarine Emergent Wetland

19 Unconsolidated Shore

20 Bare Land

21 Open Water

22 Palustrine Acquatic Bed

Late Date (2010) Classification:

This data set was created by Photo Science Inc. (www.photoscience.com).

This version of the classification is the High Resolution Land Cover (2010-era) for the Island of Tutuila, American Samoa.

This section outlines the classification procedure for the Island of Tutuila, American Samoa High Resolution C-CAP. Non-impervious features were mapped using a 0.5 acre minimum mapping unit (MMU) and impervious features were mapped using a 0.1 acre MMU.

Pre-processing steps:

The WorldView2 imagery utilized for this project was provided from Digital Globe as an orthorectified, georeferenced product. Photo Science geo-referenced the 2003 C-CAP classification and the 2003 base imagery to the WorldView2 (as it has better horizontal accuracy) to co-register the data sets.

Classification:

The 2003 C-CAP classification was overlaid on the 2010 WorldView2 imagery with a semi-transparency. The classification was systematically reviewed at a scale of 1:2,500. Where land cover changes were identified the analyst would zoom into a larger scale and manually edit the map to reflect the 2010 ground conditions. The updated map then went through an independent review to further refine the classification. Image segmentation was run on the 2010 imagery in a buffered zone around all of the changed areas. The updated land cover was summarized by the image objects (segments) to replace hand delineated boundaries with boundaries based on image segmentation. This final step ensured a consistent look and feel across the high resolution C-CAP data sets.

Attributes for this product are as follows:

0 Background

1 Unclassified

2 Impervious

3

4

5 Developed, Open Space

6 Cultivated Crops

7 Pasture/Hay

8 Grassland/Herbaceous

9 Deciduous Forest

10 Evergreen Forest

11 Mixed Forest

12 Scrub/Shrub

13 Palustrine Forested Wetland

14 Palustrine Scrub/Shrub Wetland

15 Palustrine Emergent Wetland

16 Estuarine Forested Wetland

17 Estuarine Scrub/Shrub Wetland

18 Estuarine Emergent Wetland

19 Unconsolidated Shore

20 Bare Land

21 Open Water

22 Palustrine Acquatic Bed

Post-Processing Steps:

A GIS matrix algorithm was run with 2003 and 2010 datasets as inputs. The algorithm generates

a from-to file where each combination is uniquely labeled from 1 to 521.

Process Date/Time: 2013-08-15 00:00:00

Process Step 4

CC ID: 626667
Description:

Metadata imported

Process Date/Time: 2010-05-24 00:00:00

Child Items

Rubric scores updated every 15m

Rubric Score Type Title
Entity Layer_1

Catalog Details

Catalog Item ID: 48252
GUID: gov.noaa.nmfs.inport:48252
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-14 14:38+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2021-11-30 16:28+0000
Metadata Record Published: 2018-03-13
Owner Org: OCM
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Next Review Date: 2019-03-14