C-CAP Commonwealth of the Northern Mariana Islands (CNMI), Saipan 1945-2005-Era Land Cover Change Analysis
Data Set (DS) | Office for Coastal Management (OCM)GUID: gov.noaa.nmfs.inport:48244 | Updated: July 3, 2023 | Published / External
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Summary
Short Citation
Office for Coastal Management, 2025: C-CAP Commonwealth of the Northern Mariana Islands (CNMI), Saipan 1945-2005-Era Land Cover Change Analysis, https://www.fisheries.noaa.gov/inport/item/48244.
Full Citation Examples
This data set contains the 1945-era and 2005-era classifications of
Saipan, Commonwealth of the Northern Mariana Islands and can be used to analyze change.
This data set utilized Scanned Black and White Aerial Photography and Quickbird scenes
which were analyzed according to the Coastal Change Analysis Program (C-CAP)
protocol to determine land cover.
Distribution Information
-
Create custom data files by choosing area, map projection, file format, etc.
None
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.
Controlled Theme Keywords
imageryBaseMapsEarthCover, LAND USE/LAND COVER, LAND USE/LAND COVER CLASSIFICATION
Child Items
Type | Title |
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Entity | Saipan |
Contact Information
Point of Contact
NOAA Office for Coastal Management (NOAA/OCM)
coastal.info@noaa.gov
(843) 740-1202
https://coast.noaa.gov
Metadata Contact
NOAA Office for Coastal Management (NOAA/OCM)
coastal.info@noaa.gov
(843) 740-1202
https://coast.noaa.gov
Extents
145.67027777778° W,
145.84833333333° E,
15.290656° N,
15.091067° S
1945-02-01 - 2005-04-10
Item Identification
Title: | C-CAP Commonwealth of the Northern Mariana Islands (CNMI), Saipan 1945-2005-Era Land Cover Change Analysis |
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Short Name: | 1945_2005_saipan_change |
Status: | Completed |
Publication Date: | 2011-02-16 |
Abstract: |
This data set contains the 1945-era and 2005-era classifications of Saipan, Commonwealth of the Northern Mariana Islands and can be used to analyze change. This data set utilized Scanned Black and White Aerial Photography and Quickbird 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: |
11471 |
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
|
ISO 19115 Topic Category |
imageryBaseMapsEarthCover
|
UNCONTROLLED | |
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 > WESTERN PACIFIC OCEAN > MICRONESIA > NORTHERN MARIANA ISLANDS
|
UNCONTROLLED | |
None | Coastal Zone |
None | Saipan |
None | US Territory |
Instrument Keywords
Thesaurus | Keyword |
---|---|
Global Change Master Directory (GCMD) Instrument Keywords |
CAMERAS
|
Platform Keywords
Thesaurus | Keyword |
---|---|
Global Change Master Directory (GCMD) Platform Keywords |
Airplane > Airplane
|
Global Change Master Directory (GCMD) Platform Keywords |
WORLDVIEW-2 > DigitalGlobe WORLDVIEW-2
|
Global Change Master Directory (GCMD) Platform Keywords |
WORLDVIEW-3 > DigitalGlobe WORLDVIEW-3
|
Physical Location
Organization: | Office for Coastal Management |
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City: | Charleston |
State/Province: | SC |
Data Set Information
Data Set Scope Code: | Data Set |
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Maintenance Frequency: | As Needed |
Data Presentation Form: | Map (digital) |
Distribution Liability: |
Users must assume responsibility to determine the usability of these data. |
Support Roles
Data Steward
Date Effective From: | 2011-02-16 |
---|---|
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
Date Effective From: | 2011-02-16 |
---|---|
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
Date Effective From: | 2011-02-16 |
---|---|
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
Date Effective From: | 2011-02-16 |
---|---|
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 aerial photographs and Quickbird scenes |
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Extent Group 1
Extent Group 1 / Geographic Area 1
W° Bound: | 145.67027777778 | |
---|---|---|
E° Bound: | 145.84833333333 | |
N° Bound: | 15.290656 | |
S° Bound: | 15.091067 |
Extent Group 1 / Time Frame 1
Time Frame Type: | Range |
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Start: | 1945-02-01 |
End: | 2005-04-10 |
Spatial Information
Spatial Representation
Representations Used
Grid: | Yes |
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Grid Representation 1
Dimension Count: | 3 | ||||
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Cell Geometry: | Point | ||||
Transformation Parameters Available?: | No | ||||
Axis Dimension 1 |
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Axis Dimension 2 |
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Axis Dimension 3 |
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Access Information
Security Class: | Unclassified |
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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
Download URL: | https://coast.noaa.gov/dataviewer/#/imagery/search/where:ID=4713 |
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Distributor: | |
File Name: | Customized Download |
Description: |
Create custom data files by choosing area, map projection, file format, etc. |
URLs
URL 1
URL: | https://coast.noaa.gov/digitalcoast/data/ccaphighres |
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URL Type: |
Online Resource
|
URL 2
URL: | https://coast.noaa.gov/digitalcoast |
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URL Type: |
Online Resource
|
URL 3
URL: | https://coast.noaa.gov/htdata/raster1/landcover/bulkdownload/hires/ |
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Activity Log
Activity Log 1
Activity Date/Time: | 2017-02-10 |
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Description: |
Date that the source FGDC record was last modified. |
Activity Log 2
Activity Date/Time: | 2017-11-14 |
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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
Activity Date/Time: | 2018-02-08 |
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Description: |
Partial upload of Positional Accuracy fields only. |
Activity Log 4
Activity Date/Time: | 2018-03-13 |
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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 |
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Data Quality
Accuracy: |
Attribute_Accuracy_Report |
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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 Saipan. |
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 Commonwealth of the Northern Mariana Islands, Saipan 1945-2005-Era Land Cover Change Analysis
Contact Name: | Sanborn. www.sanborn.com |
---|---|
Publish Date: | 2010-05-24 |
Extent Type: | Range |
Extent Start Date/Time: | 1945-05-09 |
Extent End Date/Time: | 2005-04-10 |
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
Description: |
Late Date (2005-era) Classification: This dataset was created by Sanborn (www.sanborn.com). This version of the classification is the High Resolution Land Cover (2005-era) for the Island of Saipan , CNMI. This section outlines the classification procedure for the Island of Saipan , CNMI 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 0.5 acre minimum mapping unit (MMU). Pre-processing steps: The Quickbird mosaic utilized for this project was provided from Digital Globe 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 March 14th and 27th, 2008. 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. 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 |
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Process Date/Time: | 2008-08-21 00:00:00 |
Process Step 2
Description: |
Process_Description This dataset was created by Sanborn. This dataset contains the classifications of 1945-era imagery and 2005- 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 1945-era classification procedure is described, then the 2005-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 (1945-era) Classification: This dataset was created by Sanborn (www.sanborn.com). This version of the classification is the High Resolution Land Cover (1945-era) for the Island of Saipan , CNMI. This section outlines the classification procedure for the Island of Saipan , CNMI High Resolution C-CAP. Scanned historic black-and-white images from 1945 were used in a semi-automated methodology to detect change (retroactive) from 2005 QuickBird imagery. The mapping approach used image segments derived from the mosaicked 1945 imagery and the 2005 land cover classification which were analyzed and categorized as changed/not changed. Once changes were identified, they were modeled into the 2005 classification to create the 1945 classification. Pervious features were mapped using a 0.5 acre minimum mapping unit (MMU), excepting some small features of historic interest. Pre-processing steps: The historic 1945 imagery was provided as scanned black-and-white unmosaicked tiffs. The tiffs were georectified using the 2005 QuickBird imagery as reference and subsequently mosaicked. Due to parallax problems with the high relief on the island, isolated shifts remained in the completed mosaics, which were accounted for in the subsequent steps. Classification: Segmentation - Image segmentation was completed at multiple scales using the 1945 mosaic, a texture band derived from the mosaic, and the 2005 land cover classification as a boundary layer. The segments were created using the MMU of 0.5 acre as an approximate minimum size threshold. Automated Classification - Image segments were classified using a decision tree classifier in See5 software into forested and non-forested categories only, using training data collected from the 1945 imagery and analyst interpretation. The result was then compared to and differenced with the 2005 land cover classification to provide a preliminary change mask. This was intended only as a broad guide to landscape changes Manual Change Interpretation and Classification - Analysts, using the preliminary change mask, scanned the imagery (both 1945 and 2005) for changes in the land cover. These changes were put into the change mask, with the segment often serving as land cover change boundaries. These boundaries were also manually changed where necessary. Those impervious surfaces that existed in 1945 but not in 2005 were edited in using raster editing methods. Once complete, the 1945 change mask was compared to/differenced with the 2005 classification to drop out any unchanged pixels. This left only those pixels and areas changed between 1945 and 2005. The change pixels were modeled into the 2005 classification to create the 1945 land cover classification. Map Finalization - Sanborn 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 |
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Process Date/Time: | 2008-08-21 00:00:00 |
Process Step 3
Description: |
Metadata imported |
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Process Date/Time: | 2011-02-15 00:00:00 |
Child Items
Rubric scores updated every 15m
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Type | Title |
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Entity | Saipan |
Catalog Details
Catalog Item ID: | 48244 |
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GUID: | gov.noaa.nmfs.inport:48244 |
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: | 2023-07-03 17:07+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 |