LIDAR mapping is a new method for mapping and detection used. This three-dimensional mapping system is very popular for engineers, designers, engineers, mapping, GIS professionals and surveyors. Compared to similar methods for three-dimensional collection of information is very accurate, relatively fast and inexpensive. LIDAR mapping is used for topographic mapping and applications.
LIDAR stands for Light Detection and Ranging. For a map created LIDAR, topographicData are equipped with laser planes. The lasers emit thousands of pulses per second and can usually measure differences in height by six inches. By measuring the time delay of sending the laser pulse and detecting the reflected signal LIDAR can measure how much the aircraft on the ground with great accuracy. These lasers are down, has the acquisition of aircraft height from the ground directly below and slightly toright and left, for a fairly wide range of properties in each run. Typically, the laser can gather information on a strip of about 1,000 feet wide from an altitude of 2000 feet.
It 'can be almost 400 square kilometers in 12 hours of detection lid session, with millions of individual points of reference of the investigation. Compared to traditional methods of investigation, the LIDAR-based 3D map be much faster. In reality, contour LIDAR mapping already replaced almost traditionalMethods. And 'much faster than using a monitoring station or the electronic version of Office Tool Surveyor old transit or other low-tech methods of collection.
Since the LIDAR instruments collect data on height, these tools in conjunction with GPS devices are used, so that the height and position can be correlated. For this reason, the instruments on the plane along with the AAP mounted LIDAR.
The data is stored in a file with the same three coordinates "x, y, z" X referslongitude, Y and Z width and height. Once the data has been collected from the aircraft, it has turned into a computerized layout of the land as a digital elevation model or DEM known. The digital elevation model allows you to automatically trace the contours and lines connecting the points with the same height. These contours show at a glance if the terrain is relatively steep or relatively flat, an essential piece of knowledge, if you are thinking of building on the ground. This map includesThe proof of artificial features such as roads and natural features such as lakes and hills. However, since these appear on the map, increasing only the determination of the nature of these functions require aerial photographs or to visit a real site.
LIDAR mapping is discreet and does not require a foot measured on the ground. This is advantageous in situations where there is only limited access to the country by land, or where the ground is dangerous. Examples of this are verysteep slopes or large areas of tidal flat, or areas where many trees complicate the land survey.
LIDAR is often used to map archaeological features to the maps of functions that can not be immediately obvious from the ground to create. LIDAR can penetrate ground cover and tree canopy, making it ideal for woodland sites. LIDAR is often used to track changes in topography along the coast. Its use in building and construction industry are many, including the planningConstruction projects, roads and mines, as well as flood modeling.
