Survey, Design & Verification
Cut-and-Fill Mapping
Cut-and-fill mapping shows differences between existing and target surfaces. Its colours are useful only when the surfaces share compatible references and the legend's sign convention is understood.
Plan the surface handover
BeforeCheck survey and design datum, extent and revision.
Work stageCalculate differences and identify workable cut areas, unsuitable material and receiving deficits.
AfterUse the map to plan movement and remeasure progress.
What to verify
Check sample locations and distinguish geometric volumes from usable material quantities.
Keep the design reference and survey evidence traceable. State units, coordinate system, vertical datum and revision, then compare independent checks with the issued target. Surface measurements establish geometry; they do not establish the material quality of a buried layer.
Scope and limits
Do not equate map balance with a guaranteed material balance after compaction.
Continue the job brief
Include the location, existing condition, intended surface, material, available tractor and proposed dates.