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Spatial Coverage
- Maryland[remove]387
- Virginia78
- Delaware45
- Pennsylvania40
- West Virginia33
- Maryland.24
- Montgomery County14
- New Jersey14
- Washington (D.C.)11
- Virginia.9
- Delaware.7
- U.S.7
- Worcester County (Md.)6
- Atlantic Coast (U.S.)5
- Charles County5
- Chesapeake Bay (Md. and Va.)5
- Fairfax County5
- Garrett County5
- Garrett County (Md.)5
- Middle Atlantic States5
