Compare us to land based surveying
Traditional survey has undergone a big change over the last decades. It is however still limited in production as the surveyor has to visit every point by foot.
In a good day 800-1000 points can be surveyed, which on road projects normally means 1.5 km in rural areas and 500 m in urban areas.
With our system we fly 40 km/h and scan 10.000 points/sec. This equals 8-10 points/m². Photos are taken as documentation.
The traditional surveyor is however coding when collecting data. This means that his time used for postprocessing is fairly short.
Why can we save you 80% on Digital Terrain Model (DTM)
The result of a laserscanning is a pointcloud,that for a DTM shall be reduced to points on the ground only.
The reduction of data starts with a classification of objects so hits on houses, trees etc. can be deleted with the identification of the object.
After the automatic reduction of data the model is digitized.
First part of this is an identification of objects, where the system can assist the operator. This requires that the object can be identified from a regression e.g. kerbs.
After this the photos are used to identify objects that cannot be found in the DTM e.g. manholes.
When the digitized map is produced the surveyor is checking it in the field in order to find missing objects such as manholes, culverts, details on structures etc.
Aerial LiDAR is
• An actractive alternative
... compared to land-