Topographic Services for all Concessions

Client: Ascendi IGI, Inovação e Gestão de Infra-Estruturas, S.A.

Work: A16 – Excavation Slope CGL.LSB.A16.014+886.TE.C.D.SL and Retaining Walls

Description:

- Work carried out using unmanned aerial systems (UAS/Drones);

- Four locations selected to materialise points on the ground that served as topographic support (GCP-Ground Control Points);

- GCP marked on the ground with cross-shaped paint for clear visibility in drone surveys;

- They were coordinated using GPS connected to the ReNEP network, obtaining the coordinates in the PT-TM06/ETRS89 system;

- Automated flight plan using Pilot software;

- Data processed in office using PIX4Dmapper software and cleaned;

- Topographic map drawn up using AutoCAD Civil 3D.