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USGS Digital Data Series: Ohio
From the site: "A cells polygon feature class was created by the U.S. Geological Survey (USGS) to illustrate the degree of exploration, type of production, and distribution of... -
USGS Digital Data Series: All States
From the site: "A cells polygon feature class was created by the U.S. Geological Survey (USGS) to illustrate the degree of exploration, type of production, and distribution of... -
USGS Digital Data Series: Illinois
From the site: "A cells polygon feature class was created by the U. S. Geological Survey (USGS) to illustrate the degree of exploration, type of production, and distribution of... -
USGS Digital Data Series: Pennsylvania
From the site: "A cells polygon feature class was created by the U. S. Geological Survey (USGS) to illustrate the degree of exploration, type of production, and distribution of... -
USGS Digital Data Series: Kentucky
From the site: "A cells polygon feature class was created by the U.S. Geological Survey (USGS) to illustrate the degree of exploration, type of production, and distribution of... -
USGS Digital Data Series: Indiana
From the site: "A cells polygon feature class was created by the U. S. Geological Survey (USGS) to illustrate the degree of exploration, type of production, and distribution of...
E' possibile inoltre accedere al registro usando le API (vedi Documentazione API).