Elevation survey | Scantech | point cloud elevation

Elevation Survey

Over the last 15 years we have carried out dozens of Elevation Surveys using laser scanning including :

  • Buildings
  • Viaducts
  • Bridges
  • Tunnel Portals
  • Walls
  • Embankments
  • Cliffs
  • Quarries

Advantages of Using 3D Laser Scanners To Undertake Elevation Surveys

Utilising Laser Scanning reduces the time required to capture an elevation and has the following advantages over traditional surveying methods :

  • Faster capture of data
  • Captures features to a high level of detail
  • Can colourise the pointcloud and images
  • Can be used to highlight defects
  • Can produce high quality orthoimages which can be marked up to highlight areas to be repaired
  • Used a record of historical buildings in case of damage during restoration

The orthoimages are generated from the pointcloud data and HDR colour photographs. Point cloud is colourised by stitching the HDR colour photographs onto the point cloud. Using specialist software we ortho-rectify the and enhance the images to sufficient quality such that they can be used as :

  • A record of the elevation for English Heritage
  • To highlight the areas for repair
  • To quantify the areas for repair to allow accurate pricing and validation

Coastal and Quarry Surveys

We set out control in permanent areas and coordinated these to OS using GPS. Using the Riegl laser scanner we can capture the profile of the cliff or quarry face in a short time which is a real requirement of coastal cliffs due the short time available due the the tidal movements. By setting out the control which is picked up in the scans we are able to compare :

  • The coastal erosion over a period of time to allow our client to determine the stability of the cliffs and estimate timescales form the danger to any buildings in the vicinity
  • The amount of material removed from a quarry

In each instance we produce a mesh of the surface at any point in time and this can be compared with the surface at a later date and our software can calculate the volume of material either eroded or removed since the previous survey.

The Riegl scanner was ideal for this type of survey due to:

  • It's longer range allows further set back from the cliff or quarry face to ensure we cover the whole height of the cliff or quarry
  • The wider area covered per scan due to the longer range
  • The focused area of scanning of just the face and control points

Since this year we can now use the Trimble SX10 laser scanner for these surveys which has :

  • a greater  range of 600m with 80mm point spacing
  • Less surface noise leading to more accurate meshes
  • Faster scans
  • Instant scan registration




Please Contact us to see how we could help you

About us