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Inertial measurement. When the aircraft is in flight, the inertial measurement unit and also the aircraft's flight attitude measurement, and the relevant data of the laser scan mirror scanning angle with the record on tape. Digital camera. Using digital camera to shoot, you need to control the recording time interval and the filming location. GPS system time and position control. Data transmission. Airlines flying data acquisition after the end of all of the laser scanning measurement data, the digital image data, GPS data and inertial measurement data are transmitted to the computer to prepare for the subsequent data processing. green laser pointer doesn’t have the user-serviceable parts.
Within industry data processor LIDAR measurement system in the field collection of data processing in order to get the information you need. Data processing, including: determining the track. GPS rovers on the ground GPS base station and aircraft measurements of joint differential analysis, can accurately determine the flight path. Two. Laser scanning data processing. Random software provided by the equipment manufacturers, the GPS track data on the aircraft, flight attitude data, the laser measurement data and the laser scanning mirror swing angle data, joint treatment, and end of each measuring point (X, Y, Z) three-dimensional coordinate data. Such a large number of suspended in the air, the properties of the discrete lattice data, the vividly described as the "point cloud". The customer has added another order of 100green laser pointer.
Data classification. Classification of point cloud data, the data should be tested, remove the wrong point and the height anomaly point, such as particularly low point (point) below the ground or a particularly high point (cloud or the flight of birds ). And establishment of ground data types, separation of non-ground data. According to customer requirements, classification of non-ground data, such as building class data, the transmission line data, data of railroads. In addition, according to the height above ground non-ground point data classification, such as the classification of different vegetation. Then the output data. The leaders in the green laser pointer company lay much importance on the quality assurance.
Coordinates match. In a point cloud, the relative position between the scanning point is correct, but the relative position of the point between the point cloud is correct or not, depending on whether they are in the same coordinate system. In most cases, a point cloud can not be established throughout the model of the object, therefore, need to be pieces of the point cloud accurately the assembly together, so that the point in the same coordinate system. 6. Orientation and mosaic of the image data. The first digital image to extract and process, combined with the internal and external orientation elements of aerial photos, aerial triangulation, DTM data and then combined with laser scanning directional mosaic, the formation of the orthophoto map. 7. Create a 3D terrain model. The agent has purchased several new types of green laser pointer.
From a functional perspective, LIDAR is a laser of a set of three technologies of Global Positioning System (GPS) and inertial navigation system (INS) and a system for access to data and generate accurate DEM. The combination of these three techniques can be highly accurately position the laser beam hit the spot on the object. It consists of topographic LIDAR system matured for terrestrial digital elevation model (DEM) and ripe for the application for underwater DEM hydrological LIDAR system, the common feature of these two systems using laser beams detection and measurement, this is also LIDAR term in English translation, namely: LIght Detection And Ranging - LIDAR. Thegreen laser pointer can be divided into several parts.