Terrestrial LiDAR
Terrestrial laser survey is a ground‐based technique that enables the rapid capture of millions of survey points, for efficient production of detailed models of topography and assets.
Terrestrial LiDAR has a maximum range of 300 meters, enabling equipment and personnel to be placed in non‐hazardous areas. This mitigates risk to personnel and prevents the need to 'power down' machinery or de‐energize structures, while the survey is being conducted.
Applications
Applications of terrestrial LiDAR include:
– As-built surveys
– Condition assessment
– Measurements of verticality and distortion
– Topographic survey
As-built Survey
The scanner records a 3D model of the structure, capturing the exact location and interaction of all components.
Condition Assessment
Example application: Condition assessment for power line lattice towers - Tower rust can be quantified through a combination of high-resolution photography and laser scanning. Visual-grade assessment may be supported and validated with photography. From the as-built surveys, we can take measurements of any steel sections. Corroded members can have exact replacements fabricated - with the location of bolt holes pre-reported and drilled - vastly reducing machinery 'down time.'
Topographic Survey
The image below shows a topographic survey around a tower. Meshes can be made on each visit and compared with Network Mapping’s custom software, to show variation (up to +/- 5 mm) in the terrain, over time.
Contour Model
A series of lines that display topographic contours, generated using LiDAR contour key points.
Digital Terrain Model
An elevation model of feature‐coded, ground‐only LiDAR data, generated according to client specification.
Vector Mapping
A series of 2D or 3D layers in CADD‐ or GIS‐compatible format, outlining various client‐specified features. Vector‐files formats demand much less disk space than point‐ or raster‐file types.
TRUVIEW
A web‐enabled panoramic point cloud viewer, in which our technicians can view, pan, zoom, measure, and mark up point cloud data.
