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Topographical survey

Extensive experience in providing high precision topographical surveys for transmission line.We provide surveys by using the traditional equipments as GPS and total stations but also using the latest innovative techniques and instrumentation such as the use of aerial drones (UAV) for photogrammetry and the 3D laser scanning device.
This allows us to increase the volumes of data required in a shortest time and ensuring the same high accuracy at very low cost to our customer.

The main activities that we perform are:

•  Establishment of a geodetic network by installing new benchmarks on the ground or using the existings ones and collect those coordinates information with GPS in a static mode 


• Post-process the collected GPS network data and materialization on the field of all the "Angle Point" of the planned line route.


• Detailed topographical survey inside a defined band and along the specified line route with GPS and total station in order to collect information regarding existing utilities such as roads, buildings, exixting power lines, railways,fences, etc…).


• Aerial photogrammetric survey using UAV and provide:
-- Ortho Images
-- Colour balanced Orthomosaics
-- Digital Terrain Models DTM
-- Digital Surface Models DSM
-- Very accurate 3D point cloud


• Aerial Lidar survey, especially for mapping existing transmission lines and for dense vegetation areas.
   
• Provide the surveying data in to the desired format such as PLS-CADD, ASCII, DWG, DXF e DGN in order to proceed with the Transmission line design activities.
  
  
  Terrestrial 3D laser scann surveys for existing power line:
   
• Evaluation of the material state of wear (insulators integrity, presence of rust etc...).
   
• Survey of existing conductors, cables or OPGW to determine the parameters and horizontal tensions.


•  Survey of the vegetation closed to the corridor of the line and identification of the potentially problematic
   
•  Very accurate 3D modeling of the line identifying tower, conductors, buildings ... for the evaluation of electromagnetic fields
   
• Re- engineering, creation of construction layout drawings of the existing towers, in case that the original ones are unavailable.
   
• Verticality of the towers and reports of deformation.
 
• Export of classified data in PLS-CADD format for the execution of the engineering activities.