Overview
Skeye provide regular aerial imagery and 3D terrain modelling for the purposes of providing the client with site updates. The data is used in CAD software to monitor change, calculate volumes of material moved and assess construction progress.
Project Background
With a site of over 287 hectares and a plan to build over 3,000 new homes in the next few years the client was looking for ways to help manage the area and wanted a cost effective method for providing mapping and modelling across the entire site. Through a series of meetings and consultations with the client and contractors Skeye presented a methodology and data output which would satisfy all of these needs. In January of 2017 Skeye were then commissioned to undertake the works and aerial surveys began.
Planning
The site is bordered on 2 sites by A roads and mainline rail track. Careful planning was undertaken to ensure flight plans remained a safe distance from these areas. Full risk assessments and method statements were generated to further ensure the safety of flights when overflying a live construction site. All safety concerns were assessed and mitigated to the satisfaction of the client.
Operational Details.
A two man team is always deployed on site and full PPE is worn. Prior to deployment the team check and pack all necessary equipment with the aide of pre-deployment checklists. Once on site take off and landing locations are carefully selected through on site risk assessments and cordons are put out to define the take off areas. Once in place the team undertakes a thorough assessment of the kit through a detailed checklist start-up procedure. This ensures the kit is prepared for flight, correct flight plans are used and camera settings are sufficient for the conditions.
Flights area undertaken at 400ft with a forward and side over lap of 70%. Upon completion of the flight a post-flight checklist is undertaken to ensure the aircraft and imagery is all in satisfactory order.
Processing / Output
Once the survey is complete the data is passed to the in-house data processing team who process the data according to the clients output requirements.
In this instance the client requires a range of data outputs in order to satisfy 3rd party contractors who also use the data. Ortho imagery is provided in a tiff format at 2cm resolution and 3D data is provided as a DTM, DSM, dxf point grid and full .las point cloud. The accuracy of the data is always <40mm across the entire site.
