AERIAL AND TERRESTRIAL LIDAR DATA ACQUISITION

We adopted terrestrial and aerial scanning services from early on in their commercial viability and have become expert practitioners in its use. Our considerable experience with its complexities provides a real advantage for our clients.

Terrestrial Light Detection and Ranging (LiDAR) is a land-based laser scanner that, combined with a highly accurate differential GPS, enables us to produce 3D computer models of terrestrial and coastal landslides, monitoring of volcanoes, earthquake and mining subsidence, quarrying, buildings, and forensics.

Satellite imagery can be used to analyze and make measurements of ground movement such as landslides. However, satellite imagery is less useful at the coast for two main reasons:

Vertical cliff faces cannot be seen from above and need to be viewed at an oblique angle, and also the changes at the coast can be very fast. Therefore we use terrestrial LiDAR as a tool to fill this gap.

Studying and, in particular, measuring landslide and cliff movements on the ground can be very dangerous. Using terrestrial LiDAR means that accurate measurements can be made from a safe distance. The technique is also cheaper to operate and technically simpler than photogrammetry.

Interspatial Technologies utilizes terrestrial laser scanning tools to perform High Definition Surveying, also known as HDS. We use different HDS scanning systems, each with different strengths that can be utilized depending on project capabilities.

The technology can provide sub-centimeter level accuracy by capturing data using HDS. Once captured, the laser scanned data points that comprise planar surfaces can be modeled and intersected to create vertices with a much higher level of accuracy and precision than if located by any other available means.

Terrestrial LiDAR can also be used to producing Digital Terrain Models (DTM with a georeferenced point cloud dataset. Using this dataset, features can be developed and imported into a MicroStation DTM file from which a triangulated irregular network (TIN) is produced with sub-centimeter level accuracy.

Interspatial Technologies is an experienced provider of terrestrial LiDAR services.