Abstract: Abstract: 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.

Purpose: Purpose: The RITA/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 Databases (NTAD) 2007. Supplemental_Information: The RITA/BTS HYDRO Database contains TIGER 2000 geometry and attributes. UTCTR flagged this database to represent major water features and edited the geometry to insure polygons would fill for cartographic representation. To find out more about TIGER/Line files and other Census TIGER data base derived data sets visit http://www.census.gov/geo/www/tiger.

Field Number	Attribute	Description	Data Type
0	FID	Internal feature number.	Long Integer representing an object identifier
1	Shape	Feature geometry.	Geometry
2	ID	Description Not Found	Double Precision Floating Point
3	LENGTH	Description Not Found	Double Precision Floating Point
4	DATA	Description Not Found	Double Precision Floating Point
5	FEATURID	Description Not Found	Double Precision Floating Point
6	ANODE	Description Not Found	Double Precision Floating Point
7	BNODE	Description Not Found	Double Precision Floating Point
8	LINKNAME	Description Not Found	Character String
9	RIVERNAME	Description Not Found	Character String
10	AMILE	Description Not Found	Double Precision Floating Point
11	BMILE	Description Not Found	Double Precision Floating Point
12	LENGTH1	Description Not Found	Double Precision Floating Point
13	LENGTH_SRC	Description Not Found	Character String
14	SHAPE_SRC	Description Not Found	Character String
15	LINKTYPE	Description Not Found	Character String
16	CTRL_DEPTH	Description Not Found	Double Precision Floating Point
17	WATERWAY	Description Not Found	Character String
18	GEO_CLASS	Description Not Found	Character String
19	FUNC_CLASS	Description Not Found	Character String
20	WTWY_TYPE	Description Not Found	Long Integer
21	CHART_ID	Description Not Found	Character String
22	NUM_PAIRS	Description Not Found	Long Integer
23	WHO_MOD	Description Not Found	Character String
24	DATE_MOD	Description Not Found	Character String
25	HEADING	Description Not Found	Character String
26	STATE	Description Not Found	Character String
27	FIPS	State FIPS code	Character String
28	FIPS2	Description Not Found	Character String
29	NON_US	Description Not Found	Character String
30	VERSION	Version of the database	Character String