ASIS GPS Shorelines: Mean High Water Shorelines for Assateague Island (1993-2022)

ASIS GPS Shorelines represent a series of mean high water shorelines collected at Assateague Island National Seashore, appended into one file geodatabase covering 1993-2022. The Department of the Interior assembled the data in support of the Northeast Coastal & Barrier Inventory and Monitoring Network's Ocean Shoreline Position Monitoring Program. Shoreline surveys are collected using a sub-meter GPS receiver mounted on an ATV or UTV, starting in August 1993 and continuing through the present day.

Use Cases

• Modeling shoreline erosion and accretion rates based on GPS-measured shoreline positions.
• Analyzing seasonal and long-term coastal dynamics based on shorelines grouped by collection season.
• Monitoring the impact of storms on beach morphology based on repeated GPS surveys.
• Comparing ocean, inlet, and bay shoreline changes based on surveys that contain multiple shoreline types.

Strengths

• Long-term temporal coverage from 1993 through at least 2022.
• Data collected using a sub-meter accuracy GPS receiver.
• Shorelines are grouped by season, allowing for seasonal trend analysis.
• Managed by the Department of the Interior for a national monitoring program.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Description metadata is limited; actual data quality requires manual inspection after download.

Provenance

Source

Department of the Interior, Northeast Coastal & Barrier Inventory and Monitoring Network

Collection Method

Collected using a sub-meter GPS receiver mounted on an ATV or UTV.

Time Range

1993-2022, with ongoing surveys post-2022.

Freshness

Last updated 2026-03-04 01:34:01.478787; freshness should be verified.

Geography

Assateague Island National Seashore, spanning Maryland and Virginia.