Source and processed data are provided for maximum grade in-hole. Analytes from drillhole geochemical datasets are compiled from the many disparate submission names and units into flat tables, using a common set of units. The maximum grade in-hole is attributed to the drillhole collar coordinates. Data are processed using the point neighbourhood statistics tool in ESRI ArcGIS software to obtain the maximum in-hole grade and density of mineralized holes for three different cell sizes (100 m, 300 m and 5 km), smoothed over the adjoining eight cells. The data are held in GDA94.