Virginia Institute of Marine Science
The data inventory developed for the Shoreline Inventory is based on a three tiered shoreline assessment approach. This assessment characterizes conditions that can be observed from a small boat navigating along the shoreline or by using observations made remotely at the desktop using high resolution imagery. The three tiered shoreline assessment approach divides the shorezone into three regions:
1 ) the immediate riparian zone, evaluated for land use; 2 ) the bank, evaluated for height, stability, cover and natural protection; and 3 ) the shoreline, describing the presence of shoreline structures for shore protection and recreational purposes.
The 2014 Inventory for Northumberland County was generated using on-screen, digitizing techniques in ArcGIS® - ArcMap v10.0 while viewing conditions observed 2012 Bing online high resolution oblique imagery and 2013 imagery from the Virginia Base Mapping Program (VBMP). These data sources allowed the inventory to be generated without additional field work. Three GIS shapefiles are developed. The first describes land use and bank conditions (northumberland_lubc_2014). The second reports shoreline structures that are described as arcs or lines (northumberland_sstru_2014). The final shapefile includes all structures that are represented as points (northumberland_astru_2014).
The shapefiles use a shoreline basemap updated in-house from the 2009 VBMP high resolution digital terrain model. The shoreline is re-coded to reflect features and attributes observed. The metadata file accompanies the shapefiles and defines attribute accuracy, data development, and any use restrictions that pertain to data
Shoreline Inventories, Virginia, GIS, Management, Data
Special report in Applied Marine Science and Ocean Engineering No. 444
Disclaimer: The Center for Coastal Resources Management (CCRM) provides these data with the understanding that they are not guaranteed to be correct or complete, and conclusions drawn from the data set are the sole responsibility of the user. Every attempt has been made to ensure that these data and the documentation are reliable and accurate. CCRM, the Virginia Institute of Marine Science (VIMS), and the Commonwealth of Virginia assume no liability for any damages caused by inaccuracies in the data or documentation; and make no warranty, express or implied, as to the accuracy, completeness, or utility of this information, nor does the fact of distribution constitute a warranty.
Supported by the Virginia Institute of Marine Science, Center for Coastal Resources Management, Comprehensive Coastal Inventory Program
Berman, M.R., Nunez, K., Killeen, S., Rudnicky, T., Bradshaw, J., Duhring, K., Stanhope, D., Angstadt, K., Tombleson, C., Procopi, A., Weiss, D. and Hershner, C.H. 2014. Northumberland County, Virginia - Shoreline Inventory Report: Methods and Guidelines, SRAMSOE no.444, Comprehensive Coastal Inventory Program, Virginia Institute of Marine Science, College of William and Mary, Gloucester Point, Virginia, 23062