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Short Citation:
Office for Coastal Management, 2022: C-CAP USVI, St. Thomas 2007-2012 Land Cover Change Analysis, https://www.fisheries.noaa.gov/inport/item/48364.

Item Identification

Title: C-CAP USVI, St. Thomas 2007-2012 Land Cover Change Analysis
Short Name: usvi_stthomas_2007_2012_ccap_hr_change
Status: Completed
Publication Date: 2015-01-30
Abstract:

This data set contains the 2007 and 2012 classifications of St. Thomas and can be used to analyze change. This data set utilized CIR imagery captured from Microsoft UltraCAM X (2010-11 flights) and Z/I Imaging DMC-II 230 (2012 flights) digital sensors and the 2007 high resolution St. Thomas C-CAP dataset 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:

11430

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 > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN > CARIBBEAN SEA > VIRGIN ISLANDS
UNCONTROLLED
None Coastal Zone
None St. Thomas, United States Virgin Islands

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: 631813
Date Effective From: 2015-01-30
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: 631815
Date Effective From: 2015-01-30
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: 631816
Date Effective From: 2015-01-30
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: 631814
Date Effective From: 2015-01-30
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 date of the Microsoft UltraCAM X (2010-11 flights) and a Z/I Imaging DMC-II 230 (2012 flights) images.

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 631819
W° Bound: -65.09978
E° Bound: -64.790115
N° Bound: 18.476359
S° Bound: 18.273179

Extent Group 1 / Time Frame 1

CC ID: 631818
Time Frame Type: Range
Start: 2007-03-11
End: 2012-01-01

Spatial Information

Spatial Representation

Representations Used

Grid: Yes

Grid Representation 1

CC ID: 631806
Dimension Count: 3
Cell Geometry: Point
Transformation Parameters Available?: No

Axis Dimension 1

Dimension Type: Row
Size: 9497

Axis Dimension 2

Dimension Type: Column
Size: 11754

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.

URLs

URL 1

CC ID: 746596
URL: https://coast.noaa.gov/htdata/raster1/landcover/bulkdownload/hires/
URL Type:
Online Resource

Activity Log

Activity Log 1

CC ID: 631834
Activity Date/Time: 2017-02-22
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 631833
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: 717996
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 746595
Activity Date/Time: 2018-03-13
Description:

Partial upload to move data access links to Distribution Info.

Technical Environment

Description:

Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; ESRI ArcGIS 10.1 SP 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. Thomas.

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 St. Thomas, United States Virgin Islands 2007-2012 Land Cover Change Analysis

CC ID: 631801
Contact Name: Dewberry. www.dewberry.com
Publish Date: 2015-01-30
Extent Type: Range
Extent Start Date/Time: 2007-03-11
Extent End Date/Time: 2012-01-01
Citation URL: https://coast.noaa.gov/dataviewer/#/imagery/search/where:ID=4962
Source Contribution:

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

Process Steps

Process Step 1

CC ID: 631802
Description:

Process_Description

This dataset, and the 2012-era classification was created by Dewberry. The 2007-era C-CAP classification was created by Sanborn.

This dataset contains the classifications of 2007 imagery and 2012 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 521 possible from-to change combinations. In this section of the metadata, the 2007 classification procedure is described, then the 2012 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 (2007-era) Classification:

Pre-processing steps: The ADS40 was provided to Sanborn as a geo-referenced product. Sanborn performed 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 (2003-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 2003-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 2003-era and 2007-era data. Since the 2003-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 2003 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.

Process Date/Time: 2014-12-31 00:00:00

Process Step 2

CC ID: 631803
Description:

Map Finalization - Sanborn used independent reviewers comments to further refine the land cover map.

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

Late Date (2012) Classification:

This section outlines the classification procedure for the St. Thomas High Resolution C-CAP performed by Dewberry. The color-infrared imagery used in producing this land cover product was also utilized in producing an associated impervious surfaces layer for the island. This land cover is based on the 2007 high resolution St. Thomas C-CAP dataset. Changes were identified using aerial photo interpretation of the 2007 dataset against the 2010-2012 imagery. A calibration visit was not conducted though NOAA had access to local resources for validation. Non impervious features were mapped using a 0.25 acre minimum mapping unit (MMU) and impervious features were mapped using a 0.1 acre MMU.

Pre-processing steps:

The 2010-2012 color-infrared imagery utilized for this project was provided from the USACE as an orthorectified, georeferenced product. The imagery was reviewed for radiometric errors, pixel dropouts, and other image issues. Individual image tiles were merged into a single mosaic and re-sampled from the native 1-foot spatial resolution to 1m.

Classification:

The 2007 C-CAP dataset was over-laid with semi-transparency on the 2010-2012 color-infrared imagery. It was panned at a scale of 1:5,000 and manually updated to match features in the 2010-2012 imagery. Analysts zoomed in to a larger scale when necessary to perform edits. The product went through a QC procedure to ensure features were accurately captured.

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

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 2007 and 2012 datasets as inputs. The algorithm generates a from-to file where each combination is uniquely labeled from 1 to 625.

Process Date/Time: 2014-12-31 00:00:00

Process Step 3

CC ID: 631804
Description:

Metadata imported

Process Date/Time: 2014-12-31 00:00:00

Child Items

Rubric scores updated every 15m

Rubric Score Type Title
Entity Layer_1

Catalog Details

Catalog Item ID: 48364
GUID: gov.noaa.nmfs.inport:48364
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-14 14:39+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2022-08-09 17:11+0000
Metadata Record Published: 2018-03-13
Owner Org: OCM
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2018-03-13
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2019-03-13