Principal Aquifers of the United States at 1:2,500,000 Scale

A 1998 map layer portrays the shallowest principal aquifers of the conterminous United States, Hawaii, Puerto Rico, and the U.S. Virgin Islands as polygons. It was developed as part of the effort to produce the printed "Ground Water Atlas of the United States" series at a 1:2,500,000 scale. This dataset is a replacement for a previous July 1998 map layer.

Use Cases

• Map national groundwater resources based on the principal aquifer polygons.
• Conduct regional hydrogeological studies based on the defined aquifer boundaries.
• Support environmental policy and water management planning based on the aquifer atlas data.
• Integrate aquifer data with other geospatial layers for cross-domain analysis.

Strengths

• Data is developed for a published atlas series at a defined 1:2,500,000 scale.
• Covers a broad geography including the conterminous U.S., Hawaii, Puerto Rico, and the U.S. Virgin Islands.
• Replaces a previous version, suggesting an effort to maintain and update the resource.

Limitations

• Last updated 1998 07 01 23 59 59 999000; freshness should be verified.
• Column-level documentation is absent; field semantics must be inferred after download.
• The published maps contain base and cultural features not included in these data.

Provenance

Source

CEOS_EXTRA via NASA Earthdata

Collection Method

Developed for the printed "Ground Water Atlas of the United States" series.

Time Range

1998

Freshness

1998-07-01 23:59:59.999000

Geography

Conterminous United States, Hawaii, Puerto Rico, U.S. Virgin Islands