This is a MD iMAP hosted service. Find more information at http://imap.maryland.gov. These datasets exist in raster and vector formats. The vector format was created from the SHA Shoreline file and graphic representations in the Lippson book (See bibliography below). These areas were then confirmed with the White book (See bibliography below) and the Habitat Requirements for Chesapeake Bay Living Resources"". While not a fishery in Maryland - they are a prey species for larger fisheries in the Chesapeake. These data sets were then converted to raster format and reclassified with a rank determined by DNR biologists. This rank determines level of habitat importance with spawning areas ranking highest and adult areas of bay depth below 3 feet ranking the lowest. These ranked rasters were then stacked and an output raster was created showing areas of high habitat diversity. These rasters were then clipped by county. Lippson - Alice Jane.""the Chesapeake Bay in Maryland. an atlas of natural resources."" the Johns Hopkins University Press. Baltimore and London - 1973. White - Christopher P.""Chesapeake Bay: Nature of the Estuary - A Field Guide"" - Centreville - MD: Tidewater Publishers - 1989.pg.172 Last Updated: 05/2014Feature Service Link:http://geodata.md.gov/imap/rest/services/Biota/MD_Finfish/FeatureServer/5 ADDITIONAL LICENSE TERMS: The Spatial Data and the information therein (collectively the ""Data"") is provided "as is" without warranty of any kind either expressed implied or statutory. The user assumes the entire risk as to quality and performance of the Data. No guarantee of accuracy is granted nor is any responsibility for reliance thereon assumed. In no event shall the State of Maryland be liable for direct indirect incidental consequential or special damages of any kind. The State of Maryland does not accept liability for any damages or misrepresentation caused by inaccuracies in the Data or as a result to changes to the Data nor is there responsibility assumed to maintain the Data in any manner or form. The Data can be freely distributed as long as the metadata entry is not modified or deleted. Any data derived from the Data must acknowledge the State of Maryland in the metadata.