1997. This layer contains the water features that were visible on the 1997 ortho photography. This contains streams, rivers, lakes, ponds, swamps, paved ...
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1. The Polygon feature represents all hydrology features greater than five feet in width.
2005. This line data represents water line running across the GMU campus, Fairfax, VA 2005.
2002. This dataset represents the locations of Independent School in Washington, DC 2002.
1. The polygon layer represents 16560 equal size cells to be used for Indexing purpose,.
2004.
Polygons identifying map sections (collections of 16 sheets) for Index Map. Each section is further divided into 4 quadrants, NW, NE, SW and ...
2005. This dataset represents the Land Use delineations in Washington, DC 2005.
2007. The LWSD layer identifies the water service area that is supplied with water from the Loudoun County Sanitation Authority (LCSA). It identifies bo...
2006. This dataset represents the locations of Landmark Structures in Washington, DC 2006.
2002. This dataset contains polygons representing the location of landmarks in Washington, DC 2002.