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SC Bias Feature – Feature class containing South Carolina proxy-datum bias information to be used in the Digital Shoreline Analysis System

Dates

Publication Date
Time Period
2018

Citation

Bartlett, M.K., Farris, A.S., and Weber, K.M., 2023, USGS National Shoreline Change - A GIS compilation of new lidar-derived shorelines (2010, 2017, and 2018) and associated shoreline change data for coastal South Carolina: U.S. Geological Survey data release, https://doi.org/10.5066/P9LLAZYE.

Summary

The U.S. Geological Survey (USGS) has compiled national shoreline data for more than 20 years to document coastal change and serve the needs of research, management, and the public. Maintaining a record of historical shoreline positions is an effective method to monitor national shoreline evolution over time, enabling scientists to identify areas most susceptible to erosion or accretion. These data can help coastal managers and planners understand which areas of the coast are vulnerable to change. This data release includes two new mean high water (MHW) shorelines extracted from lidar data collected in 2010 and 2017-2018. Previously published historical shorelines for South Carolina (Kratzmann and others, 2017) were combined with [...]

Contacts

Attached Files

Click on title to download individual files attached to this item.

SC_bias_browse.JPG
“Bias feature used in shoreline change analysis”
thumbnail 101.12 KB image/jpeg
Shapefile: SC_bias_feature.zip
SC_bias_feature.cpg 5 Bytes
SC_bias_feature.dbf 19.78 KB
SC_bias_feature.prj 402 Bytes
SC_bias_feature.sbn 3.46 KB
SC_bias_feature.sbx 260 Bytes
SC_bias_feature.shp 268.7 KB
SC_bias_feature.shx 2.81 KB

Purpose

This feature records the proxy-datum bias (PDB) and the uncertainty in the PDB. The "bias feature" is a shapefile representation the proxy-datum bias (PDB) data previously published in tabular format (Himmelstoss and others, 2010, and Himmelstoss and others, 2018). These PDB data are used to shift older proxy-based shorelines so that they can be directly compared to newer datum-based shorelines and accurate rates can be calculated. These data are provided for users of the ArcGIS DSAS extension and should only be used to determine the corrected change rate when both datum-based (e.g. MHW) and proxy-based (e.g. HWL) shorelines are included in the dataset. In this publication, the proxy-based shorelines used in the analysis are from Kratzmann and others, 2017.

Additional Information

Shapefile Extension

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