|
|
The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's surface water drainage system. NHD data was originally developed at 1:100,000-scale and exists at that scale for the whole country. This high-resolution NHD, generally developed at 1:24,000/1:12,000 scale, adds detail to the original 1:100,000-scale NHD. (Data for Alaska, Puerto Rico and the Virgin Islands was developed at high-resolution, not 1:100,000 scale.) Local resolution NHD is being developed where partners and data exist. The NHD contains reach codes for networked features, flow direction, names, and centerline representations for areal water...
Tags: Artificial Path,
Canal / Ditch,
FWHYDROGRAPHY,
Federal Government,
Hydrography, All tags...
Lake / Pond,
NHD,
NPLCC,
National Hydrogrography Dataset,
Reach Code,
Reservoir,
Spring / Seep,
Stream / River,
Swamp / Marsh,
US Geological Survey,
USGS,
Wyoming,
inlandWaters, Fewer tags
|
Ecoregions of the United States, developed by Robert G. Bailey of the Forest Service Inventory and Monitoring Institute. From metadata: this data set shows ecoregions, which are ecosystems of regional extent, in the United States, Puerto Rico, and the U.S. Virgin Islands. Four levels of detail are included to show a hierarchy of ecosystems. The largest ecosystems are domains, which are groups of related climates and which are differentiated based on precipitation and temperature. Divisions represent the climates within domains and are differentiated based on precipitation levels and patterns as well as temperature. Divisions are subdivided into provinces, which are differentiated based on vegetation or other natural...
Categories: Data;
Types: Downloadable,
Map Service,
Shapefile;
Tags: Alabama,
Alaska,
Arizona,
Arkansas,
Bailey’s ecoregions, All tags...
California,
Colorado,
Connecticut,
Delaware,
District of Columbia,
Ecoregions,
Ecoregions,
Ecosystem Geography,
Ecosystem Geography,
Ecosystems,
Ecosystems,
Florida,
Georgia,
Hawaii,
Idaho,
Illinois,
Indiana,
Iowa,
Kansas,
Kentucky,
Louisiana,
Maine,
Mapping,
Mapping,
Maryland,
Massachusetts,
Michigan,
Minnesota,
Mississippi,
Missouri,
Montana,
Nebraska,
Nevada,
New Hampshire,
New Jersey,
New Mexico,
New York,
North Carolina,
North Dakota,
Ohio,
Oklahoma,
Oregon,
Pennsylvania,
Puerto Rico,
Regional Ecology,
Regional Ecology,
Rhode Island,
South Carolina,
South Dakota,
Tennessee,
Texas,
U.S. Virgin Islands,
United States,
Utah,
Vermont,
Virginia,
Washington,
West Virginia,
Wisconsin,
Wyoming, Fewer tags
|
|
