1. Mineral Resources
2. Online Spatial Data
3. Prospect- and mine-related features on USGS topographic maps

Database structure

Table	Description
datadxny	Data dictionary, explaining tables and fields
points	Point features digitized from historical USGS topographic maps.
polygons	Polygonal features digitized from historical USGS topographic maps.

Database field categories

Site identification	4
Geographic location	6
Site characteristics	8
Bibliographic reference	10
Metadata	18