Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), NOAA Coastal Services Center (CSC), 200310, Vectorized Shoreline of Guam, Derived from IKONOS Satellite Imagery, 2000 through 2003: NOAA's Ocean Service, Coastal Services Center (CSC), Charleston, SC.
This is a Vector data set. It contains the following vector data types (SDTS terminology):
Planar coordinates are encoded using Coordinate Pair
Abscissae (x-coordinates) are specified to the nearest 0.000128
Ordinates (y-coordinates) are specified to the nearest 0.000128
Planar coordinates are specified in meters
The horizontal datum used is D_WGS_1984.
The ellipsoid used is WGS_1984.
The semi-major axis of the ellipsoid used is 6378137.000000.
The flattening of the ellipsoid used is 1/298.257224.
Sequential unique whole numbers that are automatically generated.
Coordinates defining the features.
|1||NOAA Coastal Services Center|
|2||Guam Coastal Zone Management Program|
|1||One-meter panchromatic IKONOS digital satellite imagery|
|2||USGS Digital Raster Graphics (DRG)|
|3||USGS Digital Ortho Quad Photos|
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 coast resource management programs of the Territories of American Samoa and Guam, the Commonwealth of the Northern Marian 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.
Incorporated, Space Imaging , 20001017, IKONOS Panchromatic Satellite Imagery: Space Imaging, Thornton, CO.
United States Geological Survey, 19980226, Guam Digital Raster Graphic (DRG): USGS, Reston, VA.
United States Geological Survey (USGS), 1997, Digital Ortho Quads for Agana, Agat, and Apra: United States Geological Survey, Reston, VA.
Note - Areas of the shoreline that were obscured by cloud cover in the satellite imagery were digitized from USGS Digital Raster Graphics (DRGs). The USGS DRGs for Guam were adjusted in the x and y directions using ERDAS Imagine 8.5 to match the IKONOS imagery. IKONOS imagery used were collected 20001017, 20001130, 20010511, 20010511, 20010514, 20021111, 20021114, 20030105, 20030116. This step began 20020905 and ended 20030923.
Person who carried out this activity:
Person who carried out this activity:
The data were created by delineating the shoreline off of IKONOS panchromatic digital satellite imagery collected in 2000 - 2003. 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.
This shoreline dataset of Guam is dependent on the shoreline as delineated on 2001 through 2003 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 recent imagery become available.
These data are believed to be logically consistent, though no tests were performed. All arcs were snapped by the nodes to create consistently tied strings without node dangles. Line geometry is topologically clean.
Are there legal restrictions on access or use of the data?
- Access_Constraints: 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.
Users must assume responsibility to determine the appropriate use for these data. Disclaimer- While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
|Data format:||ESRI Shapefile|