United States Geological Survey FISC St. Petersburg, Open File Report 2007-1176
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 0.000001
Ordinates (y-coordinates) are specified to the nearest 0.000001
Planar coordinates are specified in meters
The horizontal datum used is North American Datum of 1983.
The ellipsoid used is Geodetic Reference System 80.
The semi-major axis of the ellipsoid used is 6378137.000000.
The flattening of the ellipsoid used is 1/298.257222.
The USGS FISC, St. Petersburg office, would like to acknowledge NASA Goddard Space Flight Center for their cooperation and assistance in the development of the data. The USGS would also like to acknowledge park management and personnel at Assateague Island National Seashore.
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This shapefile was generated as an intermediate step to create a series of USGS LiDAR maps. The polygons represent specific regions of a 2x2km tile that have usable LiDAR data. All areas not covered by polygons correspond to areas of No Data on the LiDAR tile. This shapefile is particularly useful as an analysis mask within ARC Spatial Analyst.
Person who carried out this activity:
727-803-8747 (voice)
Person who carried out this activity:
727-803-8747 (voice)
Raw elevation measurements have been determined to be within 1.5 meter horizontal accuracy. Processing steps (grid interpolation) may introduce additional error which has not been tested at the time of this publication.
Elevations of the DEM are vertically consistent with the point elevation data, +/- 15cm.
This layer is complete.
This extent layer was generated from existing LiDAR tile data using ARCMap 9.1.
Are there legal restrictions on access or use of the data?
- Access_Constraints:
- Any use of these data signifies a user's agreement to comprehension and compliance of the USGS Standard Disclaimer. Ensure all portions of metadata are read and clearly understood before using these data in order to protect both user and the USGS's interests. See section 6.3 Distribution Liability.
- Use_Constraints:
- Although the USGS is making these data sets available to others who may find the data of value, the USGS does not warrant, endorse, or recommend the use of these data for any given purpose. The user assumes the entire risk related to the use of these data. These data sets are not for navigational purposes. The USGS is providing these data "as is", and the USGS disclaims any and all warranties, whether expressed or implied, including (without limitation) any implied warranties of merchantability or fitness for a particular purpose. In no event will the USGS be liable to you or to any third party for any direct, indirect, incidental, consequential, special, or exemplary damages or lost profits resulting from any use or misuse of these data.
Acknowledgement of the U.S. Geological Survey FISC St. Petersburg office, as a data source would be appreciated in products developed from these data, and such acknowledgement as is standard for citation and legal practices for data source is expected by users of this data. Sharing new data layers developed directly from these data would also be appreciated by the USGS staff. Users should be aware that comparisons with other data sets for the same area from other time periods may be inaccurate due to inconsistencies resulting from changes in photo interpretation, mapping conventions, and digital processes over time. These data are not legal documents and are not to be used as such.
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OFR_2007-1176
Neither the National Park Service nor the USGS shall be held liable for improper or incorrect use of the data described and/or contained herein. These data and related graphics are not legal documents and are not intended to be used as such. Although all data published have been used by the USGS and NPS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials.
| Data format: | SHP (version March 2006) Shapefile |
|---|---|
| Media you can order: | DVD (format Standard DVD) |
Contact USGS for details.
Call USGS for details.
727-803-8747 (voice)