1. A method for determining at least one of a position or a location of a plant component in a mining extracting plant the method comprising: using an evaluation system comprising a detection unit having an image sensor to receive, onto the image sensor, a projection of at least four object points located on at least one measuring object associated with the plant component, the at least four object points having a predetermined spacing from each other and being detectable within at least one of a visible wavelength range, an ultra-violet wavelength range, or an infra-red wavelength range; recording positional data of the at least one measuring object as projected onto the image sensor; calculating coordinates of the plant component in a three-dimensional space based upon the positional data received from the projection of the at least four object points onto the image sensors; and determining the position or the location of the plant component based upon the coordinates calculated in three-dimensional space, wherein the plant component comprises one of: at least one face conveyor for removing extracted materials, a shield-type support system having a plurality of shield-type support frames configured to keep a face open, displacing devices configured to move the at least one face conveyor and the shield-type support system in active operation, and an extracting machine moveable along the face conveyor, and wherein the at least four object points of the at least one measuring object are moved along the face conveyor independently of the extracting machine and are detected by way of a plurality of detection units located along one or more of the shield-type support frames of the shield-type support system in a fixed manner.