GIS Lookup: Detailed Data Layer Listing

Title: "NTAD: Hydrographic Features (polygon)" (2004)
Description: The hydro polygon/arc coverages were created using TIGER/LINE 2000 shapefile data gathered from ESRI's Geography Network. The individual county hydrography line shapefiles were processed into Arc/Info coverages and then appended together to create complete state coverages. They were then edited to remove unwanted features, leaving a state-by-state database of both important and navigable water features. Attributes were added to denote navigable features and names. Also, an attribute was added to the polygons to denote which were water and which were land features. The state databases were then appended together to create a single, nationwide hydrography network containing named arcs and polygons. These features also contain a state FIPS. Because some of the hydro features are represented by lines instead of polygons, the complete hydro dataset consists of 2 shapefiles, one for lines and one for polygons. They must be used together to paint a complete picture. The BTS desires a single nationwide database that has polygons/attributes for major rivers and lakes, is consistent across state lines, and has the most accurate data available. This database will be used primarily for map production, basic queries, and will be distributed as part of the National Transportation Atlas Database (NTAD) 2004.
Keywords and Themes: Hydrography, Polygons, Water
Filename Prefix: hydropol
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Mapped Drive Folder: /fedgov/bts/ntad04/polygon/hydro/
Total size of data files: 161.15 MB
Data Type: ESRI Shapefile
Feature Type: Polygon
Coordinate System: GCS_WGS_1984
Datum: D_WGS_1984Map Units: Decimal degrees

Spatial Extent: United States
Source Scale: Consistent with TIGER 2000

Created by: U.S. Bureau of the Census (BOC)
Released by: Bureau of Transportation Statistics (BTS)
Content Date: 2000
Published Date: 20040511

Collection Name: National Transportation Atlas Databases (NTAD) 2004
Physical Location: Reference Gov. Docs. CD Cabinet
Call Number:
Acquired Date: 20040901
Distribution Restrictions: Public Domain

Note: Acknowledgement of the Bureau of Transportation Statistics (BTS) National Transportation Atlas Databases (NTAD) 2004 would be appreciated in products derived from these data.

Links to Metadata, Documentation, and Mapping:

Record ID: 2503_ntad04