Digital Geologic-GIS Map of National Park American Samoa

American Samoa National Park is represented by a digital geologic-GIS dataset from the National Park Service's Geologic Resources Inventory program. The dataset includes GIS data layers and tables in multiple formats, supported by ancillary documents containing geologic unit descriptions and metadata. It was adapted from source maps by the University of Hawaii, Cartographic Laboratory and geology maps after Stearns (1981).

Use Cases

• Visualizing geologic unit distributions based on the provided GIS data layers.
• Conducting spatial analysis of geologic contacts and faults based on the map structure.
• Integrating geologic data with other environmental layers for park management planning.
• Creating custom geologic maps and cross-sections using the provided GIS project files.

Strengths

• Data is available in multiple GIS formats including file geodatabase, OGC geopackage, and KMZ/KML.
• Includes supporting documentation such as geologic unit descriptions in a PDF ancillary map information document.
• Supported with project files for both ArcGIS Pro and QGIS software environments.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• The KMZ/KML format version is limited in data layers presented and in access to ancillary table information.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

National Park Service (NPS) Geologic Resources Division (GRD), adapted from University of Hawaii, Cartographic Laboratory Atlas maps.

Collection Method

Completed as a component of the Geologic Resources Inventory (GRI) program.

Time Range

Source geology maps are after Stearns (1981).

Freshness

Last updated 2026-03-04 00:58:49.587596; freshness should be verified.

Geography

National Park American Samoa, American Samoa.