Vectorized Shoreline of Guam, Derived from IKONOS, 2002

Metadata also available as

Metadata:

Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator:

United States Department of Commerce, National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC)

Publication_Date: 20021202

Title: Vectorized Shoreline of Guam, Derived from IKONOS, 2002

Edition: first

Geospatial_Data_Presentation_Form: vector digital data

Publication_Information:

Publication_Place: Charleston, SC
Publisher:: United States Department of Commerce, National Oceanic and Atmospheric Administration, National Ocean Service, Coastal Services Center

Other_Citation_Details:

The vectorized shoreline data was derived from the one-meter panchromatic IKONOS imagery. Those areas of the coastline that were obscured by cloud cover were derived from United States Geological Survey (USGS) Digital Raster Graphics (DRGs)

Online_Linkage:

\\Csc-srv-cis\cisdata\CIS\ID\islands\gis_data\shorelines\final\guam\guam_poly

Description:

Abstract:: IKONOS imagery was purchased to support the Pacific Islands Geographic Information System (GIS) project and the National Ocean Service's (NOS) coral mapping activities. One-meter panchromatic and four-meter multi-spectral data were purchased for each study area. A digital vector shoreline was manually digitized from the one-meter panchromatic imagery to provide accurate, up-to-date shoreline data.
Purpose:: The Pacific Islands Geographic Information System (GIS) project is a multiyear initiative designed to increase the use of GIS and related spatial technology in the coastal resource management programs of the Terrorities of American Samoa and Guam, the Commonwealth of the Northern Mariana Islands (CNMI), and the State of Hawaii. The project will focus on personnel, training, equipment, software, data, and applications. Where appropriate, other related activities in the region will be incorporated into the effort.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20001017
Ending_Date: 20010602

Currentness_Reference: ground condition

Status:

Progress: Complete
Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: 144.616021
East_Bounding_Coordinate: 144.959948
North_Bounding_Coordinate: 13.655213
South_Bounding_Coordinate: 13.233837

Keywords:

Theme:

Theme_Keyword_Thesaurus: None
Theme_Keyword: Shoreline
Theme_Keyword: Vectorization
Theme_Keyword: Shoreline vectorization
Theme_Keyword: Shoreline data
Theme_Keyword: Pacific Islands GIS
Theme_Keyword: IKONOS

Place:

Place_Keyword_Thesaurus: None
Place_Keyword: Pacific Islands
Place_Keyword: Coastal Zone
Place_Keyword: Guam
Place_Keyword: Oceana
Place_Keyword: United States

Access_Constraints: none

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.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NOAA Coastal Services Center

Contact_Position: Pacific Islands GIS Specialist

Contact_Address:

Address_Type: mailing and physical address
Address: 2234 South Hobson Avenue
City: Charleston
State_or_Province: South Carolina
Postal_Code: 29405
Country: USA

Contact_Voice_Telephone: 843-740-1200

Contact_Facsimile_Telephone: 843-740-1224

Contact_Electronic_Mail_Address: csc@csc.noaa.gov

Hours_of_Service: Monday through Friday, 8 a.m. to 5 p.m., Eastern Standard Time

Native_Data_Set_Environment:

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.0.0.535

Data_Quality_Information:

Logical_Consistency_Report:

These data are believed to be logically consistent, though no tests were performed. All arcs were snapped by the nodes to create consistantly tied strings without node dangles. Line geometry is topologically clean.

Completeness_Report:

This shoreline dataset of Guam is dependent on the shoreline as delineated on 2001 IKONOS digital satellite imagery from Space Imaging, LLC. The position of the shoreline might change as the natural land changes or better maps and more current aerial photography become available.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:: The data were created by delineating the shoreline off of IKONOS panchromatic digital satellite imagery collected in 2000 - 2001. The horizontal resolution of the digital imagery is 1 meter. The original scale of the imagery was 1:3780. During orthorectification of the IKONOS imagery, 73 ground control points were used to determine the circular error (CE) at a 90% confidence level. For Pacific Islands, Guam, IKONOS data, 2002 the circular error is 8.5 meters for the Panchromatic data set.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report: None

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Space Imaging Incorporated

Publication_Date: 20001017, 20001130, 20010511, 20010511, 20010514,

Title: IKONOS Panchromatic Satellite Imagery

Geospatial_Data_Presentation_Form: remote-sensing image

Publication_Information:

Publication_Place: Thornton, CO
Publisher: Space Imaging

Online_Linkage: <http://www.spaceimaging.com>

Source_Scale_Denominator: 3780

Type_of_Source_Media: CD-ROM

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20001017
Ending_Date: 20010602

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: IKONOS

Source_Contribution: CSC Pacific Islands GIS Program

Source_Information:

Source_Citation:

Citation_Information:

Originator: United States Geological Survey

Publication_Date: 19980226

Title: Guam Digital Raster Graphic (DRG)

Geospatial_Data_Presentation_Form: map

Publication_Information:

Publication_Place: Reston, VA
Publisher: USGS

Online_Linkage: <http://mapping.usgs.gov>

Source_Scale_Denominator: 24000

Type_of_Source_Media: CD-ROM

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 19980226

Source_Currentness_Reference: ground condition

Source_Contribution: CSC Pacific Islands GIS Program

Source_Information:

Source_Citation:

Citation_Information:

Originator: USGS
Title: Agana, Agat, and Apra Ortho Quads
Other_Citation_Details:: USGS Digital Ortho Quads supplied by the National Park Service. Scale of Imagery is 1:2835.

Source_Scale_Denominator: 2835

Type_of_Source_Media: CD-ROM

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1997

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: Digital Ortho Quads

Source_Contribution: National Park Service

Process_Step:

Process_Description:

During the vectorization process, the satellite imagery was displayed on a computer screen using ESRI's ArcGIS 8.2 software. In order to obtain the highest degree of accuracy from the imagery, the one-meter panchromatic imagery was used as a base layer for digitizing. In an effort to better visualize the land-water interface, the one-meter imagery was overlaid on top of the four-meter multispectral imagery using a 35 % transparency value. The near-infrared band (Band 4) was used in the display of the multispectral imagery. The resultant base layer contained the one-meter resolution of the panchromatic imagery and the colorization of the four-meter imagery. The display was zoomed to the image resolution of the panchromatic imagery and the shoreline was manually digitized. Areas of the shoreline that were obscured by cloud cover were digitized from USGS DRGs. All lines are coded with length, ID, origin, and source. The areas of the shoreline obscured by cloud cover were corrected and digitized by utilizing USGS Digital Ortho Quad Photos.

Known problems: The USGS DRGs for Guam had to be adjusted in the x and y directions using ERDAS Imagine 8.5 to match the IKONOS imagery.

Process_Date: 20020905 - 20020923

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NOAA Coastal Services Center

Contact_Position: Pacific Islands GIS Specialist

Contact_Address:

Address_Type: mailing and physical address
Address: 2234 South Hobson Avenue
City: Charleston
State_or_Province: South Carolina
Postal_Code: 29405
Country: USA

Contact_Voice_Telephone: 843-740-1200

Contact_Facsimile_Telephone: 843-740-1224

Contact_Electronic_Mail_Address: csc@csc.noaa.gov

Hours_of_Service: Monday through Friday, 8 a.m to 5 p.m., Eastern Standard Time

Process_Step:

Process_Description:

Further modification of the Guam shoreline was conducted by staff within the Coastal Management Program. ArcView 3.2 was used to adjust shapefile vector vertices. Most alterations were done by combining the visual information available within the one-meter panchromatic imagery of Guam together with local knowledge of the coastline , and some DOQ data from NPS through USGS. Metadata was updated using ArcGIS 8.2 software.

Process_Date: 20011113

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: James Byrne
Contact_Organization: Guam Coastal Management Program

Contact_Address:

Address_Type: mailing address
Address: P.O Box 2950
City: Hagatna
State_or_Province: Guam
Postal_Code: 96932
Country: USA

Contact_Voice_Telephone: 671-472-4201

Contact_Facsimile_Telephone: 671-477-1812

Contact_Electronic_Mail_Address: jbyrne@mail.gov.gu

Process_Step:

Process_Description: Metadata imported.
Source_Used_Citation_Abbreviation:: I:\islands\GIS_Data\Shorelines\Final\Guam\guam_final_nad83.shp.xml

Process_Step:

Process_Description: Metadata imported.
Source_Used_Citation_Abbreviation: C:\DOCUME~1\JMURPH~1.PAL\LOCALS~1\Temp\xml426A.tmp

Process_Step:

Process_Description: Dataset copied.
Source_Used_Citation_Abbreviation:

Process_Step:

Process_Description: Dataset copied.
Source_Used_Citation_Abbreviation:

Process_Step:

Process_Description: Dataset copied.
Source_Used_Citation_Abbreviation: I:\guam_data\Guam_Data\Guam_shoreline

Cloud_Cover: < 10 %

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: G-polygon
Point_and_Vector_Object_Count: 43

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Label point
Point_and_Vector_Object_Count: 0

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 43

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Point
Point_and_Vector_Object_Count: 4

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator

Universal_Transverse_Mercator:

UTM_Zone_Number: 55

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: 147.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 0.000128
Ordinate_Resolution: 0.000128

Planar_Distance_Units: meters

Geodetic_Model:

Horizontal_Datum_Name: D_WGS_1984
Ellipsoid_Name: WGS_1984
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257224

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Guam_Shoreline

Attribute:

Attribute_Label: FID

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI