Before any volume calculation can be performed a three dimensional digital terrain model is required. This may be from an actual survey we have completed or from a 3rd party source. The more dense the level coverage is over the area the better as this will produce a more accurate model and therefore volume. Break lines, ie. top and bottoms of banks need to defined and a continual ‘string’ around the extents of the site, mound or spoil heap. It should be noted to the reader that we cannot guarantee these volumes as there is ‘Bulking’ to consider and what happens under the mound, heap or land where the volume will be compared to. This is the assumed gradient from one side to the other of the area, mound or spoil heap in question. Output of any volume will be in cubic metres with ‘Cut or Fill’ noted along with the areas calculated.