Northumberland County, Virginia
Digital Shoreline Situation Report (SSRs) - Description and Disclaimer
The Comprehensive Coastal Inventory Program (CCI) at the Virginia Institute of Marine Science (VIMS) is generating new Shoreline Inventory Reports for coastal localities in Virginia. This effort compliments a parallel effort in Maryland by the same group. Documents known as Shoreline Situation Reports were developed by VIMS in the 1970s for Virginia and have been the foundation for shoreline management planning in Tidewater Virginia ever since. CCI has developed new protocols for collecting, disseminating, and reporting data relevant to shoreline management issues using state of the art mapping and remote sensing techniques. The new Shoreline Inventory Reports are being generated on a county by county basis for Maryland and Virginia, and describe conditions along their tidal tributaries to the Chesapeake Bay. This series is published entirely in digital format
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 online Bing 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 (nthb_lubc_2014). The second reports shoreline structures that are described as arcs or lines (nthb_sstru_2014). The final shapefile includes all structures that are represented as points (nthb_astru_2014).
The shapefiles use a shoreline basemap updated in-house from the 2011 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
This site provides access to all downloadable files. The links are at the bottom of this page. When downloading data from this site, the users agree to all conditions outlined in the disclaimer below. The text report includes an outline of methods. The Map Viewer illustrates the updated conditions based on observable changes identified from the updated imagery. Tables quantify data based on river systems. These sources can be downloaded with Adobe Acrobat Reader. GIS data are available as shapefiles
Disclaimer for Digital Shoreline Inventory Reports
The Comprehensive Coastal Inventory Program (CCI) and the Center for Coastal Resources Management (CCRM) provides these data with the understanding that it is 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. Neither CCI, CCRM, or the Virginia Institute of Marine Science (VIMS) assume liability for any damages caused by inaccuracies in the data or documentation, or as a result of failure of the data to perform in a particular manner. CCI, CCRM, VIMS and the Commonwealth 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.
Individuals who download these data agree to the following, and understand the limitations defined. Integration of these data into other products requires proper citation. Proper citation for this dataset is: "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."
Use of these data in map publications, either digital or hardcopy, requires proper citation, and inclusion of the CCRM logo (see CCRM logo)
CCI/CCRM is not responsible for misuse of these data.
CCI does not oversee or assume responsibility for alterations to this product by users.
CCI may not address specific questions from users who received the data through another party.
Distribution of these data is not restricted. CCI, however, recommends metadata file(s) always remain with the data.
CCI encourages noticeable errors be reported to CCI contact person identified in the metadata file.