You will find the use for it in city information systems and GIS and working schemes for engineering lines (line networks – gas, water, communications, electric lines, telecommunications).
Advantages of laser scanning:
- high density of measured data in short time period
- possibility of use even in reduced visibility
- high accuracy of obtained data
Principles of the laser scanning method
We send a laser beam measuring the distance that it will perform towards the Earth’s surface. At the same moment, we register the location of the beam with the help of differential GPS and inertial navigation. The interpretation of all parameters we receive the information about one specific point of surface. The carrier of the entire laser device is usually an airplane or helicopter in contrast to terrestrial laser scanning, where it is possible to place the system in a terrestrial vehicle.
Aerial laser scanning at GEODIS
GEODIS has great deal of experience with the use of different technologies for aerial laser scanning.
Today we use the MK II device from the Swedish company Topeye for very precise projects.
In 2001, we performed several projects using this technology, aimed especially at the documentation of the river basins of waterways and an elaboration of 3D models with flood analysis, in 2005 we realized several projects focused on the digital highway model with high accuracy (mz = 36 mm), airport model, models of smaller waterways in order to obtain a profile of the river-basins and modelling of flood situations, forest stand model for the purpose of observing the growth and development of the forest, a precise city model connected to an orthophotomap of high resolution (pixel 5 cm), surface model above gas lines, 3D survey of transference electrical system and their zones of protection, or airport and railway models.
Since 2000, we process data made by aerial lidars of various European companies in specialized programs and in that way we have managed to deepen our knowledge in this field of remote sensing.
E.ON, RWE, ENVIA, DEUTSCHE BAHN (German Railways), ČEPS (Czech transmission system operator), Ředitelství silnic a dálnic (Road and Motorway Directorate of the Czech Republic), various river directorates, SPP and many others belong to our most important customers in the field of aerial laser scanning.
