Data Collection
Detailed aerial data collection, can comprise of RGB (standard camera) both in rectangular and 360 degree, thermal , Lidar, IR (infrared) or any sensor you wish (under 6kg). Primarily we are set up to create DTM (digital terrain models) of locations & virtual reality fly throughs, like google street view. Our post production facilities are available separately.
DJI supply most of our kit as it easily conforms to CAA regulations. However, if you have specific data needs. We can create a bespoke air unit for you.
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3D SCANNING
Photogrammetry & Lidar
3DÂ models from 2DÂ pictures
Photogrammetry is the use of multiple images to create a 3D model, usually in the form of a cloud of points, resembling an impressionist painting. From this data set a PC can fill in the gaps with polygons, rendering a lifelike representation of the subject. It is reasonably simple to collect enough photographs but the post production time and cost is higher than Lidar.
Light detection & ranging (Lidar)
Lidar uses an active laser, that rotates and fires out millions of light 'pings', measuring the distance of each one to the subject. Similarly to photogrammetry, a point cloud is the result. Though it lacks colour values, it is far more precise and the hardware more expensive.
Photogrammetry & Lidar combined
LiDAR can be used to perform similar tasks to photogrammetry and can strengthen its outputs. The use of both techniques in combination means that LiDAR, especially terrestrial laser scanning, can add details that aerial photogrammetry data may have missed. Thus, when LiDAR and photogrammetry are combined they bring more detail to a project that may not have been achieved by either individually.
A multi-survey can handle billions of points imported from multiple sources, helping us achieve a hybrid project using LiDAR and photogrammetry.
With vectorization software bridging the gap between photogrammetry and CAD. It enables users to merge photogrammetry point clouds with point cloud data acquired with other technologies, including LiDAR. For complicated projects, e.g. with narrow objects such as ships rigging (see our SS Great Britain), LiDAR can help fill in the gaps that photogrammetry data collection methods may miss.
