http://inspire.ec.europa.eu/codelist/ExplorationActivityTypeValue/approximateResourceCalculationINSPIRE Registry teamJRC-INSPIRE-SUPPORT@ec.europa.euhttp://inspire.ec.europa.eu/registry2015-08-18 17:34 PM CEST2015-08-18 17:34 PM CESTapproximate calculation of the resourceRough evaluation of the tonnage and grade essentially based on drill holes information, by correlation and interpolation of intersected mineralized sections.