USGS MRDATA has a lot more mines. Their data is also freely available for download. I use their datasets and base maps for my personal GIS projects.
USGS MRDATA has a lot more mines. Their data is also freely available for download. I use their datasets and base maps for my personal GIS projects.
It includes what most would call quarries and it doesn't include anywhere near all of them (there are basically infinite invisible quarries everywhere to make concrete because it doesn't transport well).