Martin National Wildlife Refuge in Virginia

This data set contains boundary layers for the Martin National
Wildlife Refuge in Maryland.

National Wildlife Refuges are federal lands managed by the U.S. Fish
and Wildlife Service (USFWS). The primary source for boundary
information is the USFWS Realty program (status maps, legal
surveys). An effort by the USFWS Region 5 (northeast states -ME,NH,VT,
MA, RI, CT, NY, PA, NJ, MD, DE, WV, VA) Realty Division, Cartography
and Spatial Data Services Branch has resulted in digital refuge
boundaries for all refuges in the northeast at a scale of 1:24,000.

The intended application of the data is to serve as a spatial
reference of refuge boundaries for other data layers in GIS and
mapping applications. It is specifically not intended to be used as a
land survey or representation of land for conveyance or tax purposes.

Status maps were registered to geographic coordinates, boundaries were
digitized and labeled. Digital files were updated using survey and
collateral data, then stepped through 3 levels of quality-control
review for spatial and thematic accuracy.

Refuge boundaries define areas that are approved by the U.S. Congress
for acquisition into the National Wildlife Refuge System, or are
currently owned by USFWS. Arcs are coded with an item "boundary"with
the type of boundary line; polygons are coded with an item "status"
that describes their ownership status.

[Summary provided by U.S. Fish & Wildlife Service]