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Wimpole Road

Cut and Fill Report

Introduction

A Cut and Fill report provides vital insight for pre-construction preparations and is a key piece of information needed for any earth/groundworks project.

In this case study we will be looking at how we were able to combine results from a GPS survey and a drone survey to produce a Cut and Fill Report for a client looking to build a service yard. ​​​

Client: 

Private Client

Date:
Equipment used:

  • Mavic 3 Enterprise with RTK Module  

  • Leica GS18T GNSS​ 

  • Premium Positioning RTK network

28/01/2023

Service: 

Cut and Fil Report

Location:

South Cambridge, Wimpole Road 

Software used:

Task

On this job we were tasked with producing an initial survey of a yard and a Cut and Fill report for the proposed concrete service yard on site.

 

The main features to be picked up were:​

  • Level contours

  • Obstructions in the proposed service yard area 

  • Topographic elements 

  • Produce Cut and Fill report 

Solution

We Used our Mavic 3 enterprise to fly the initial mission for a level contour and main topographic features, The GPS was used to collect data where there was high ground vegetation that would compromise the results a drone survey would have produced. 

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How did using a drone specifically help this project?

  

  • Removed a large amount of manual point collection for the large open areas.

  • The data we provided was guaranteed by our quality report that we produce on every job and compared to known control points.

  • The drone was able to get a higher resolution of level points, producing a more accurate estimation of existing material that needed to be moved.

  • By combining the drone data with the GPS data we were able to produce the survey in just 2 site visits rather than it being a week long exercise.

Results

We produced a Cut and Fill report for the proposed service yard with net cut and fill values as well as itemised cut and fill values for each area.

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By using the drone we were able to produce a 5x5M grid of levels which gave us enough resolution for an accurate Cut and Fill report. We were also able to pick up topographic features such as gates and power lines in the proposed work areas.  These features were brought to the attention of the client for further review.

​

Using Virtual Surveyor our, ,analytical software of choice, we produced a linear topographic drawing and a road section drawing which the client was able to view using traditional AutoCAD software.

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Summary

  • Combined data provided a better resolution compared to using GPS data alone. 

  • Cut and Fill report was generated with higher accuracy as it used the larger level sample set from the drone mission.

  • Images from site can be reviewed remotely and passed on to a designer for further inspection of site topography.

  • The DSM produced by the drone helped reduce noise generated from small shrubs and other ground vegetation for a true ground level reading.

  • Orthomosaic images were used to produce a boundary report and could be put forward to designers for site constraints.

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