Advice on deliverables for Excavation Estimation

[Anonymous]

Hello, 

     I need to find out what is actually given to contractors who need qto and estimation for earthwork. We use UAVs to gather data, process it into a surface using Agisoft, and import it into c3d to define new surfaces and use the volumes dashboard. My issue is in deciding what to submit. We have a grid of surface elevation labels showing what the fill or cut will be, and also straightforward topos. What other materials can I create that will look good.

Alos, how can I best double check the data? I used the construction plans and measurement tools to verify basic conformity.

Thank you very much

[tcorey]

Well...hmmm.

EG Contours, FG Contours, Cut/Fill contours, Grid of Cut/Fill Labels, Elevation Analysis showing cut/fill depth by color fill, Cross Sections with running cut/fill values. Tables and reports out the...er, lots of tables and reports.

Did I mention cross sections? Contractors want cross sections.

Surfaces. Many contractors want your surfaces so they can control their equipment by GPS. Make sure your data are accurate or you'll make them mad at you.

Regarding double-checking your data, the biggest key is to get surveyed, by a land surveyor, control points that you can use for registering your photos. Having those accurate surveyed points lets you easily check your surface for accuracy when you're in Civil 3D. If you're using Lidar on the UAV, then it helps you tweak locations that you gathered with the on-board gps. A land surveyors, with survey-grade gps, sitting on points for the time required control points, is more accurate than your realtime on-board UAV-based GPS that is in constant movement. Fit your model to the control.