Wong, Florence L. , 2007, marshallsc - 200-m contours extracted from gridded bathymetric data for the Republic of the Marshall Islands: USGS Miscellaneous Field Studies Map MF 2324.Online Links:
This is a Vector data set. It contains the following vector data types (SDTS terminology):
Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.001. Longitudes are given to the nearest 0.001. Latitude and longitude values are specified in Decimal degrees.
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.
CONTOUR integer, water depth
HATCH flag for type of contours:
0 unflagged
1 contours around depressions
2 contours around local maximum
3 unknown, identifies long regional contours
4 unknown, flags long contour in northwest
650-329-5327 (voice)
650-329-5190 (FAX)
fwong@usgs.gov
These data are intended for science researchers, students, policy makers, and the general public. The data can be used with geographic information systems (GIS) software to display geologic and oceanographic information.
Removed depression contours from southern Kwajalien per inspection of latest version of ETOPO2 data <http://www.ngdc.noaa.gov/mgg/fliers/06mgg01.html>. Parent grid unchanged.
The bathymetry and coastline data and other line data were merged and edited in ARC/INFO, which caused some edge-matching problems among the data sets. The new USGS-KORDI survey bathymetry data were desampled to a 250-m spacing. A buffer zone 4500 m to either side of the new data was used to mask out the underlying two-minute data. The resulting data sets were combined to construct a surface according to the triangular irregular network (TIN) model supported by ARC/INFO. The data were gridded on 1000-m grid cells with a smoothing (quintic) option. Contours were extracted at 200-m intervals. Final map was compiled and edited in Adobe Illustrator, v. 8.0.1.
Complete
Chain-node topology present.
Are there legal restrictions on access or use of the data?
- Access_Constraints: None.
- Use_Constraints:
- These data are not to be used at scales greater than 1:1,000,000. Not intended for navigation use.
650-329-5327 (voice)
650-329-5190 (FAX)
fwong@usgs.gov
Downloadable Data
Please recognize the U.S. Geological Survey (USGS) as the source of this information.Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data.
The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials.
| Data format: | ARCE (version 9.2) Arcinfo shapefile Size: 3.491 |
|---|---|
| Network links: |
<https://pubs.usgs.gov/mf/1999/2324/> |
Download from <https://pubs.usgs.gov/mf/1999/2324/>
(650) 329-5327 (voice)
(650) 329-5190 (FAX)
fwong@usgs.gov