Short Citation:
Office for Coastal Management, 2021: C-CAP United States Virgin Islands, St. John 2005-2007-Era Land Cover Change Analysis, https://www.fisheries.noaa.gov/inport/item/48267.

Item Identification

Title: C-CAP United States Virgin Islands, St. John 2005-2007-Era Land Cover Change Analysis
Short Name: 2005_2007_USVI_stjohn_lc_change
Status: Completed
Publication Date: 2010-05-24
Abstract:

This data set contains the 2005-era and 2007-era classifications of

St. John, United States Virgin Islands and can be used to analyze change.

This data set utilized 14 full or partial ADS40 scenes

which were analyzed according to the Coastal Change Analysis Program (C-CAP)

protocol to determine land cover.

Purpose:

To improve the understanding of coastal uplands and

wetlands, and their linkages with the distribution,

abundance, and health of living marine resources.

Notes:

11494

Keywords

Theme Keywords

Thesaurus Keyword
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
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
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 > Atlantic Ocean > North Atlantic Ocean > Caribbean Sea > Virgin Islands
None Coastal Zone
None St. John
None US Territory

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: 627222
Date Effective From: 2010-05-24
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: 627224
Date Effective From: 2010-05-24
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: 627225
Date Effective From: 2010-05-24
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: 627223
Date Effective From: 2010-05-24
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: Date of the ADS40 and IKONOS scenes

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 627228
W° Bound: -64.813587
E° Bound: -64.644711
N° Bound: 18.375487
S° Bound: 18.296723

Extent Group 1 / Time Frame 1

CC ID: 627227
Time Frame Type: Range
Start: 2005-12-26
End: 2007-03-11

Spatial Information

Spatial Representation

Representations Used

Grid: Yes

Grid Representation 1

CC ID: 627213
Dimension Count: 3
Cell Geometry: Point
Transformation Parameters Available?: No

Axis Dimension 1

Dimension Type: Row
Size: 3704

Axis Dimension 2

Dimension Type: Column
Size: 7404

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: 744240
Download URL: https://coast.noaa.gov/dataviewer/#/imagery/search/where:ID=4719
Distributor:
File Name: Customized Download
Description:

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

URLs

URL 1

CC ID: 744242
URL: https://coast.noaa.gov/htdata/raster1/landcover/bulkdownload/hires/
URL Type:
Online Resource

URL 2

CC ID: 744243
URL: https://coast.noaa.gov/digitalcoast
URL Type:
Online Resource

Activity Log

Activity Log 1

CC ID: 627244
Activity Date/Time: 2017-02-10
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 627243
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: 717121
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 744241
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 St. John.

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 United States Virgin Islands, St. John 2005-2007-Era Land Cover Change Analysis

CC ID: 627208
Contact Name: Sanborn. www.sanborn.com
Publish Date: 2010-05-24
Extent Type: Range
Extent Start Date/Time: 2005-12-26
Extent End Date/Time: 2007-03-11
Citation URL: https://coast.noaa.gov/digitalcoast
Source Contribution:

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

Process Steps

Process Step 1

CC ID: 627209
Description:

Process_Description

This dataset was created by Sanborn.

This dataset contains the classifications of 2005-era imagery and 2007-

era imagery. It is used for change analysis between these years. The

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

481 classes corresponding to the 481 possible from-to change combinations.

In this section of the metadata, the 2005-era classification

procedure is described, then the 2007-era 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 (2005-era) Classification:

This section outlines the classification procedure for the U.S. Virgin Islands C-CAP product.

The IKONOS image tiles utilized for this project were provided by GeoEye as orthorectifed,

georeferenced products and were consistent with the quoted 1:12000 spatial accuracy. In conjunction with the

IKONOS, Sanborn used LiDAR collected in 2007 for the island. Training data was collected in the

field between May 31th and June 5th, 2009. Land cover observations were recorded by analysts. The

referenced dataset went through a QA/QC procedure to ensure it met accuracy standards. 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. 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 field observations, and analyst photo interpretation/selection.

Models are built to refine or reclassify land cover areas by utilizing the wealth of attribute information

linked to each segment within Definiens. 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. Sanborn used independent

reviewer's comments to further refine the land cover map.

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

Process Step 2

CC ID: 627210
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 Aquatic Bed

23 Estuarine Aquatic Bed

24 Tundra

25 Snow/Ice

Ancillary Datasets:

Non-IKONOS image datasets used are LiDAR (2 foot point spacing density), DCM (Digital Canopy Model derived from LiDAR),

slope, aspect, NWI, NLCD, field-collected points, photo-interpreted points.

QA/QC Process:

There were several QA/QC steps involved in the creation of this product. There was an internal QA/QC.

This was done by viewing the classification frame-by-frame along with the IKONOS imagery, the

classification, and high resolution reference imagery. NOAA staff completed a similar review and

provided both general and point comments.

Late Date (2007-era) Classification:

Pre-processing steps:

The ADS40 was provided to Sanborn as a geo-referenced product. Sanborn perfomed a quality

control on the imagery to check for pixel dropouts and other image issues. Individual image tiles were

combined to create a single image for the entire island. The early date (2005-era) classification was

created first using satellite data because at the time it was the most recent, cloud free imagery

available. The late date (2007-era) ADS40 became available shortly after the early date classification

was completed. The ADS40 imagery was found to have ortho-rectification accuracy. The 2005-era classifications

and imagery were geo-rectified to co-register with the ADS40 imagery.

Change Detection:

Once the images were aligned, the next step was to

determine the areas of change between the 2005-era and 2007-era data. Since the

2005-era classification was already complete, it is only necessary to classify

the areas of change to create a 2007-era classification of the same specifications.

The 2007 ADS40 imagery was segmented with the 2005 land cover classification as a hard boundary

delimter. Logical rulesets and thresholding based on the spectral properties of the imagery

and the early date classification were used to generate a mask of potential change. The change

mask was incorporated into the early date classification to create the draft late date classification.

This map was further revised with rulesets and thresholding. The final step before map finalization was

to remove inaccuracies through manual segment labeling as interpreted by an analyst. Sanborn

used independent reviewer's comments to further refine the land cover map.

Post-Processing Steps:

A GIS matrix algorithm was run with 2005 and 2007 datasets as inputs. The algorithm generates

a from-to file where each combination is uniquely labeled from 1 to 481.

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

Process Step 3

CC ID: 627211
Description:

Metadata imported

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

Child Items

Rubric scores updated every 15m

Rubric Score Type Title
Entity (ENT) US West Coast Coastal Zone

Catalog Details

Catalog Item ID: 48267
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-14 14:38+0000
Metadata Record Last Modified By: Erik Hund
Metadata Record Last Modified: 2020-12-10 17:47+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