Exploration services are conducted for the investigation of mineral and coal resources and reserves. Exploration activities are carried out using direct exploration methods (geological mapping, float tracing, trenching, test pits, sampling, and exploration drilling) and indirect exploration methods (remote sensing, geophysical methods, and geochemical methods). These exploration activities will determine the form, size, quality, and economic value of mineral and coal resources and reserves, which will be compiled into a document or final exploration report and/or advanced exploration report.