High density geo-referenced tillage implement draft and tractor fuel consumption data were obtained for primary tillage in a 32 ha field using an instrumented research tractor. This tractor was fitted with a set of sensors, a GPS, and an on-board data logger to measure and record tractor operational parameters as the tractor is doing normal field work. The spatial data sets were mapped with standard mapping software. The draft and fuel consumption maps showed distinct patterns of draft and fuel consumption corresponding to varying soil strength. Fine lines of higher draft and fuel consumption were observed perpendicular to the direction of travel. These lines were continuous across adjacent passes, and were consistent in both the draft and fuel consumption maps. The direction of these lines corresponded to the direction of subsurface drainage tile, but their locations did not always correspond to the exact locations of the drainage tile. The lines may also be due to soil compaction resulting from field traffic from a previous operation. The very fine and consistent detail observed in the tillage implement draft maps demonstrates their utility in identifying anomalies in the field which may affect yield, and may require remedial action. High density spatial data for the draft and fuel consumption maps can be collected in conjunction with a normal tillage operation.