Online Links:
| Range of values | |
|---|---|
| Minimum: | 1 |
| Maximum: | 1000000 |
| Range of values | |
|---|---|
| Minimum: | 1 |
| Maximum: | 1000000 |
Acknowledgment of the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center Coastal and Marine Geology Program as a data source would be appreciated in products developed from these data, and such acknowledgment as is standard for citation and legal practices. Sharing of new data layers developed directly from these data would also be appreciated by the U.S. Geological Survey staff. Users should be aware that comparisons with other datasets for the same area from other time periods may be inaccurate due to inconsistencies resulting from changes in photointerpretation, mapping conventions, and digital processes over time. These data are not legal documents and are not to be used as such.
This dataset consists of off-shore reference baselines that approximate the trend of the open-ocean shoreline of Assateague Island, Md. and Va. The baselines were drawn using ArcGIS 10.1 and then used in Digital Shoreline Analysis System (DSAS) software (USGS Open-File Report 2008-1278)to create digital transect lines perpendicular to the baselines and across Assateague Island at 20 meter (m) intervals. The back-island shorelines and shoreline points included in this data series publication are based on the intersect of back-island shorelines and transects lines. These baselines are suitable for use in DSAS or other software packages to produce other transect lines.
Are there legal restrictions on access or use of the data?Access_Constraints: None.
Use_Constraints:Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center Coastal and Marine Geology Program as the originator of these data in future products or derivative research.
Although these data were processed successfully on a computer system at the USGS, no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The USGS shall not be held liable for improper or incorrect use of the data described and/or contained herein. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
| Data format: | ArcGIS shapefile |
|---|---|
| Network links: |
https://pubs.usgs.gov/ds/0928/downloads/baselines_transects.zip |
Publications are available from USGS Information Services, Box 25286, Federal Center, Denver, CO 80225-0046 (telephone: 1-888-ASK-USGS, e-mail: infoservices@usgs.gov).