Topcon Office Ideas

When selecting points to compare to a DTM, the report needs to include a statistical summary showing the Standard Deviation, RMS and Mean.

This is a useful (and technically mandatory) requirement for Registered Surveyors to report volume uncertainty.

Typically when you have a TIN, the volume calculated is exact (TIN to TIN), but the uncertainty of the TIN relative to the terrain surveyed needs to be tested. This is done by measuring redundant points in the field that do not form part of the TIN. These redundant points are compared to the TIN and the Standard Deviation (2 Sigma 95%) is required for uncertainty calculations.

While you can do this manually by exporting the point comparison results to Excel and running stats, the other top three survey software (TBC, Terramodel, 12d) all have this included in a standard report which forms a legal record of the volume.

While you at it, add the TIN-TIN volume method (Prismoidal) to the options of the report too.