Lidar

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Development and implementation of new technologies of performance of geodetic works have always been performed to reduce terms and labor costs for field works. It is safe to say that any direction of lidar fully meets this principle. Popularity of innovative lidar technology is justified by a number of benefits compared to classic methods of survey:

BENEFITS OF LIDAR:

  1. SAFETY.

    Due to application of reflectorless method of measurements LiDAR does not required human presence at the object of survey. It enables getting precise data even in hazardous or hardly accessible areas.


  2. LABOR COSTS SAVING.

    A great scope of field scanning works may be performed even by a team comprising three persons in short terms.


  3. PROCESSING AUTOMATION.

    Fully digital data format enables maximum automating their processing and almost excludes influence of subjective aspects on the result.

  4. UNRIVALED SPEED OF SURVEY.

    With regard to scanner type and range of tasks being solved speed of object survey is several times faster and in some case, e.g. during airborne LiDAR scanning of areas difficult to access – dozens and hundreds of times.

  5. DETAILS AND INFORMATION CONTENT OF DATA.

    Data received by means of LiDAR enable reflecting geometric parameters of the objects and providing a detailed description of the shape, as well as nature of surveyed surface, what is impossible at survey by standard methods.

  6. COST OF WORKS.

    Taking into account high productivity and accuracy of scanning systems, cost of works performed with the use of scanning methods is lower than cost of works with survey by traditional methods.


THREE TYPES OF LASER SCANNING ARE DISTINGUISHED IN TERMS OF DESIGNATION AND METHOD OF REALIZATION OF THE TASKS:

three types of laser scanning



USE OF LASER SCANNING BY INDUSTRY:

  • Railroads and infrastructure facilities Identifying as-built geometrical parameters of railway infrastructure. Monitoring railway line condition. Renovation and design of railroad facilities;

  • Highways and transport infrastructure. Drawing road data sheet. Estimating visibility range, wheel tracking and evenness. Drawing lists of road facilities. Cadastral registration;

  • Power industry. Detection and analysis of OHPL oversize. Defining pole centers and deviations from the vertical axis. Detecting defects of pole elements. Searching dangerous trees able of damaging OHPL elements. Monitoring vegetation growth and planning appropriation of funds for clearing OHPL rights-of-way. Choosing territories to be flooded when designing hydropower facilities. Cadastral registration and identifying exclusion zones;

  • Mining industry. Preparing and designing facilities, calculating precise volume of production and monitoring ground subsidence and other changes;

  • Cartography.Obtaining the most precise terrainrelief model for creating orthophotomaps and contouring;

  • Management of natural resources.Creating vegetation models based on ALS which helps defining tree heights and calculating volume of biomass even in the most isolated areas. Monitoring soil slips, snow cover depth, glacier movement;

  • Oil and gas industry. Designing new and expanding existing pipelines. Monitoring clearings overgrowing. Cadastral registration and identifying exclusion zones;

  • Municipal engineering. Creating 3D models and topographic plans of city blocks, industrial facilities and other urban facilities

  • Archaeological survey.Detecting and mapping concealed archaeological objects and underground disposals, 3D-imaging and modeling architectural monuments for subsequent restoration

  • Natural resources and agriculture.Mapping and monitoring of garden land growth (tree height), monitoring of growth heterogeneity and development of measures on irrigation and fertilizer optimization. Optimization of the distribution of water and drainage processes by using surface 3D-model.

  • Monitoring and emergency prevention.Efficiency of collecting and processing of information, possibility to monitor the development of negative processes in a large area.

  • Ecology and environment. Possibility to cover a large geographical area, development of forecasts of negative processes on the basis of data monitoring.

  • THREE TYPES OF LIDAR ARE DISTINGUISHED IN TERMS OF DESIGNATION AND METHOD OF REALIZATION OF THE TASKS:

  • Terrestrial (TLS)
  • Airborne (ALS)
  • Mobile (MLS)
  • SELECTION OF LiDAR METHODS DEPENDS ON SPECIFIED TASK AND OBJECT CONFIGURATION:

  • Surface LiDAR is used for scanning of small objects with maximum accuracy (units of millimeters);
  • Airborne LiDAR is useful for scanning of big areas from 1000 hectares, as well as extended corridor objects;
  • Mobile LiDAR is usually required for extended corridor objects, like parts of motor and railways.

  • DEPENDING ON THE AREA OF SURVEY, SPECIFIC FEATURES OF TERRITORIES, REQUIRED DATA ACCURACY ONE OF THE SCANNING METHODS MAY BE SELECTED FOR THE MOST EFFECTIVE SOLUTION OF SPECIFIED TASKS.