| Map Layer Source |
 |
| Data Layer |
File Type |
Feature Type |
Source |
Source File Name |
Source Link |
Pub Date |
Processing Info |
| Cities |
shapefile |
point |
U.S. Geological Society & U.S. Dept. of Interior -- National Atlas |
Cities and Towns |
http://nationalatlas.gov/atlasftp.html |
11/6/2000 |
File was altered by DBED to include only select feature and attribute data. |
| U.S. Highways |
shapefile |
line |
Federal Highway Administration |
National Highway Planning Network v.3 |
http://www.bts.gov/gis/ |
1999 |
File was altered by DBED to include only select feature and attribute data and enhance readability at smaller scales |
| Interstates |
shapefile |
line |
Federal Highway Administration |
National Highway Planning Network v.3 |
http://www.bts.gov/gis/ |
1999 |
File was altered by DBED to include only select feature and attribute data and enhance readability at smaller scales |
| County (fill) |
shapefile |
polygon |
U.S. Department of Commerce -- Bureau of Census |
Census Boundary Files - County 2000 |
http://www.census.gov/geo/www/cob/ |
2001 |
File was altered by DBED to include only select feature and attribute data. |
| County (line) |
shapefile |
polygon |
U.S. Department of Commerce -- Bureau of Census |
Census Boundary Files - County 2000 |
http://www.census.gov/geo/www/cob/ |
2001 |
File was altered by DBED to include only select feature and attribute data. |
| State (fill) |
shapefile |
polygon |
U.S. Department of Commerce -- Bureau of Census |
Census Boundary Files - State 2000 |
http://www.census.gov/geo/www/cob/ |
2001 |
File was altered by DBED to include only select feature and attribute data. |
| State (line) |
shapefile |
polygon |
U.S. Department of Commerce -- Bureau of Census |
Census Boundary Files - State 2000 |
http://www.census.gov/geo/www/cob/ |
2001 |
File was altered by DBED to include only select feature and attribute data. |
| Water (background) |
shapefile |
polygon |
MD Department of Business & Economic Development |
Water Background |
n/a |
2001 |
DBED created shapefile of single polygon for purpose of displaying water. |
| Water (text) |
shapefile |
polygon |
MD Department of Business & Economic Development |
Water bodies text bounding polygon |
n/a |
2001 |
DBED created shapefile of polygons for purpose of identifying water body. |