TIGER/Line Shapefile, 2019, Series Information for the Area Hydrography County-based Shapefile

The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic
and cartographic information from the U.S. Census Bureau's Master Address File / Topologically
Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). The MTDB represents a
seamless national file with no overlaps or gaps between parts, however, each TIGER/Line File is designed
to stand alone as an independent data set, or they can be combined to cover the entire nation. The Area
Hydrography Shapefile contains the geometry and attributes of both perennial and intermittent area
hydrography features, including ponds, lakes, oceans, swamps (up to the U.S. nautical three-mile limit),
glaciers, and the area covered by large rivers, streams, and/or canals that are represented as
double-line drainage. Single-line drainage water features can be found in the Linear Hydrography
Shapefile (LINEARWATER.shp). Linear water features includes single-line drainage water features and
artificial path features, where they exist, that run through double-line drainage features such as
rivers, streams, and/or canals, and serve as a linear representation of these features.