er63d - Virginian Barrier Islands and Coastal Marshes
er63f - Delmarva Uplands
er64c - Piedmont Uplands
er65n - Chesapeake Rolling Coastal Plain
Based on Ecoregions developed by the EPA this map
describe areas of general similarity in ecosystems and in the type,
quality, and quantity of environmental resources, as well as similarity of
climate that can assist Delaware gardenders.