Database fields, all categories

Site identification
	`id`	Unique identifying number corresponding to label on map published as Open-File Report 2006-1135
	`site`	Name given to a mine or processing plant that distinguishes it from others the company owning the facility may have. It may be t
Geographic location
	`country`	The country in which the mine or processing plant is located
	`dms_lat`	Angular distance measured on a meridian north or south from the equator, expressed in degrees-minutes-seconds
	`dms_long`	Angular distance between the plane of a meridian east or west from the plane of the meridian of Greenwich, expressed in degrees-
	`latitude`	Angular distance measured on a meridian north or south from the equator, measured in decimal degrees.
	`longitude`	Angular distance between the plane of a meridian east or west from the plane of the meridian of Greenwich, measured in decimal d
Site characteristics
	`facility`	The type of operation -- may be a mine or one of several kinds of processing plants
	`method`	The method of mining used by the operation if it is considered to be a mine
	`company`	The principal company operating at the site
	`status`	An indicator of whether an operation was producing in 2004
	`capacity`	The amount it is possible to produce at the facility
	`units`	The unit of measure for the plant capacity attribute of the site.
Commodities
	`commodity`	The material mined or processed at the site