ADVANCED CAPABILITY USING LIDAR TECHNOLOGY IN GEODETIC SURVEY

Transcription

1 ADVANCED CAPABILITY USING LIDAR TECHNOLOGY IN GEODETIC SURVEY 2015

2 LiDAR IT IS ONE OF THE MOST CONTEMPORARY TYPES OF SURVEY, WHICH ENABLES GETTING INFORMATION ABOUT THE AREA. IN THE LATEST DECADE DATA OF LIDAR ARE INCREASINGLY USED IN DESIGNING AND MONITORING DIFFERENT INFRASTRUCTURE OBJECTS AND NATURAL PROCESSES. THIS METHOD IS APPLIED IN CONSTRUCTION, MOTOR-WAY BRANCH, ARCHITECTURE, OIL AND GAS INDUSTRY, POWER ENGINEERING AND OTHER AREAS. TERRESTRIAL (TLS) AERIAL (ALS) MOBILE (MLS) Terrestrial laser scanning is used for scanning of small objects with maximum accuracy (units of millimeters). Аerial laser scanning is useful for scanning of vast objects from 1000 hectares, as well as extended corridor objects; Mobile laser scanning is usually required for extended corridor objects, like parts of motor and railways.

3 Aerial laser scanning NO DOUBT, IN COMBINATION WITH DIGITAL AERIAL SURVEY IT IS THE MOST EFFECTIVE METHOD OF SURVEY OF LARGE AREAS AND EXTENDED OBJECTS. It is reasonable to perform aerial laser scanning at survey and monitoring of extended corridor objects, like oil and gas pipelines, power supply lines, at survey of vast objects, at survey of forestcovered area, getting true relief of soil surface even under tree crowns without any loss of accuracy. Besides, ALS enables surveying such areas, surface survey thereof is very burdensome or practically impossible. For large volumes cost of ALS works is many times and even dozens of times lower, than traditional survey. For example, use of ALS enables surveying up to 140 km2 per hour at density up to 6 points per m2, thus ensuring significant time and costs saving for the customer.

4 Aerial laser scanning TECHNOLOGY GNSS antenna IMU pitch roll Laser beam Reflected laser beam heading

5 Aerial laser scanning TECHNICAL EQUIPMENT AERIAL SCAN SYSTEM RIEGL-780 LONG-RANGE LASER SCANNER LMS-Q780 THE MOST MODERN AERIAL LASER SCANNER TODAY FROM LEADING MANUFACTURER IN PRODUCTION OF LIDAR SYSTEMS POWERFUL LASER EMITTER. It may receive an unlimited number of returns (within limits of one impulse). LASER EMITTER POWER REGULATION with regard to purposes of scanning. It is designed for general mapping of vast objects, as well as corridor scanning of extended linear objects. FLYING ALTITUDE UP TO 4700 m above surface. Perfectly suits for LiDAR and aerial survey of comprehensive and high mountain relief of the area. Frequency does not fall down significantly, when flying altitude is increasing. Operating height range: Scanning mechanism: Scanner impulse frequency: Measurement frequency: Absolute accuracy: Measurement accuracy: Scanning frequency: Maximum field of view: Operating temperature range: (AGL) m rotating prism khz up to per second 1/12500 of altitude 20 mm lines per second 60 (at any frequency of scanning) from 10 С to +40 С NO NEED OF FOLLOWING THE TERRAIN and multiple scanning at different altitudes (for relief with sharp significant altitude drops). MAXIMUM SPEED OF DATA POSTPROCESSING AND DECODING. High quality of received primary materials is achieved due to automation of great number of operating processes and high density of laser returns. The reason is the use of fast opto-mechanical beam scanning and use of unique technology of rotating polygon mirror.

6 Mobile laser scanning THIS METHOD COMBINES THE HIGH PERFORMANCE OF AERIAL LASER SCANNING AND ACCURACY OF TERRESTRIAL LASER SCANNING. MLS PERFORMED ON MOVING GROUND VEHICLE AT SPEEDS UP TO 100 KM / H. MOBILE SCANNING SYSTEM CAN BE MOUNTED ON CARS, SHIPS, RAILWAY PLATFORMS AND OTHER VEHICLES. Quick, precise and eye-friendly lasers in combination with high-speed drives for scanning with wide FOV, enable getting great volumes of geodetic data with the highest extent of details on extended objects, regardless of cloud amount at any time of day and night. In a rugged terrain the system can be installed on a off-the-road vehicle.

7 Mobile laser scanning TECHNOLOGY If survey of a big built-up area by total stations may take several weeks, mobile LiDAR will cope with such task in a few hours. And quality of received data will be no worse than traditional methods of survey. The scanning performs along the trajectory, for a distance up to 800 m in all directions. The achievable accuracy of all the point cloud up to 1 cm, with the preparation of the corresponding geodetic network. Y X Z Radial scanning of laser scanner beam up to 800 m GNSS- antenna and IMU GNSS- receiver of basic station

8 Mobile laser scanning TECHNICAL EQUIPMENT MOBILE SCAN SYSTEM RIEGL VMX-450 MAXIMUM DETAIL EXTENT AND ACCURACY. Measurement frequency up to 1.1 mln/sec ensures maximum detail extent of data even at high speed of motion. The most full photofixation (frequency of survey 6 shots per second by every camera). Achieved relative accuracy up to 10 mm. ENABLES CREATING PANORAMIC RADIOGRAPHS on account of the use of 6 digital cameras with horizontal view angle of 80 degrees. SCANNING REMOTE OBJECTS. Maximum distance to the object from 300 to 800 m at respective variation of reflection factor. Number of scanners: Max. range of measurements: Minimum measured distance: Absolute accuracy (mean value): Accuracy of long-range measurements: Speed of scanning: Field of view: Laser class: Number of cameras: Camera matrix resolution: Maximum frequency of photographing: Field of view of every camera: 2 Up to 800 m 1.5 m mm (mean value) 8 mm measurements/sec (eye-friendly) 6 5 Mp (2452x2056) 18 shots/sec 80 х 65 (horizontally and vertically) COMPACT SIZE. Mobile LiDAR system is one of the most compact in its class. Quick and economic equipment installation, possible installation on various vehicles.

9 Mobile laser scanning MLS should be performed at geodetic survey and monitoring of: condition of motor and railways, estimation of technical condition of tunnels, 3D-modeling of municipal infrastructure and other objects along transport ways.

10 Benefits of LiDAR Quality, Speed, Cost saving, Convenience 1. COST OF WORKS Taking into account high productivity and accuracy of scan systems, cost of works performed with the use of scanning methods is lower than cost of works with survey by traditional methods approximately 3-5 times. 2. 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 aerial laser scanning scanning of areas difficult to access dozens and hundreds of times. 3. DETAILS AND INFORMATION CONTENT OF DATA Data received by means of laser scanning 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. 4. ACCURACY The accuracy of the laser scanning is comparable to the accuracy of ground-based surveying and much higher than the accuracy of the classical aerial photography. 5. UNIQUENESS OF THE METHOD ALS enables surveying such areas, surface survey thereof is very burdensome or practically impossible. As for, for example, hardly accessible areas: vast snow-covered, forest territories, wetlands, fenlands, and deserts, as well as remote high mountain areas. 6. SAFETY Due to application of reflectorless method of measurements laser scanning does not require human presence at the object of survey. It enables getting precise data even in hazardous or hardly accessible areas. 7. FLEXIBILITY Assured getting the true terrain even under dense vegetation, and the ability to conduct a survey on the complexity of any relief. 9. PROCESSING AUTOMATION. Fully digital data format enables maximum automating their processing and almost excludes influence of subjective aspects on the result.

11 Applications of LiDAR Long-distance corridor objects Railways Highways Pipelines Power lines

12 Applications of LiDAR Railways 1. Inventory of railway infrastructure; Building plans, longitudinal and transverse profiles; 2. Analysis of the parameters of infrastructure of railways and their comparison with the standard values ; 3. Implementation of an integrated GIS railway infrastructure.

13 Applications of LiDAR Railways 1. Aerial laser scanning for the design and reconstruction: ortophotoplans; digital terrain models; digital models of above-ground facilities; perspective survey; 2. Mobile laser scanning for creating a digital model of the way and infrastructure: creating contact network models; creating rails models; update of ballast prism geometry; 3. Terrain laser scanning for 3D-models and deformations measurement of Bridges and tunnels.

14 Applications of LiDAR Railways Definition of dimensions of infrastructure along the railway track; Definition of dangerous trees to falling on the road and damage to of contact network.

15 Applications of LiDAR Railways Designing of avalanche protection structures based on high detailed terrain model of slopes. Definition of landslides and deformation monitoring for railway subgrade.

16 Applications of LiDAR Highways Survey speed of roads is up to 250 km per day; Detailed and reliable information on the state of the road surface; Safety survey. No need to block or restrict a traffic.

17 Applications of LiDAR Highways Design, repairs, renovation and construction of roadways. Engineering land surveying of roadways. Analysis of the condition of roadway surfacing and profile, road kerb and rutting of roadway. Identification of visibility distances, road bend radius and superelevations. Roadway and road network certification. Compiling a list of road signs, message signs and billboards, street lights, traffic control signals and other road infrastructure. Arranging the monitoring and regular information update system. Traffic management planning

18 Applications of LiDAR Highways High detailed mobile laser scanning allows to detect road kerb and rutting of roadway 41 см 38 см А 0,73 м 2,12 м В Line AB profile 5 см 8, 1 см 5 см

19 Applications of LiDAR Pipelines Topographical survey for design of new pipelines and reconstruction of existing ones; Exploration of territory for a pipeline during design stage; Monitoring of a pipeline state in difficult terrain (finding places ascent and strains); Create 3D models; Create drawings, topographic plans and orthophotos; Construction of longitudinal profiles along the axis of the pipeline; Prediction of emergencies.

20 Applications of LiDAR Powerlines To identify clearance between phase and groundwires. To identify horizontal, vertical and internal clearance/ dimensions between the line and the ground, water bodies that the HVL crosses and various structures and objects. To detect defects of tower/ pylon elements. To define tower/ pylon centers and deviations from the vertical axis along and across the HVL. To determine the scope of extending the HVL right-of-way, dimensions of areas covered with shrubs, bush and trees.

21 Applications of LiDAR Powerlines To identify the locations and height of potentially dangerous trees posing threat to HVL elements. To monitor vegetation growth and plan allocation of funds for clearing HVL rights- of-way. To monitor the current situation (fallen and hazardous trees). To model mechanical leads on various HVL components affected by changing electrotechnical factors and weather conditions. To specify the HVL technical certificate, draw towers and crossings lists. To build PLS-CADD and risk models of the grid functioning. X Y Z м X Y Z 64.3

22 Applications of LiDAR Powerlines Distance to crossing Distance to ground Distance to vegetation

23 Applications of LiDAR Airports Design of Airports Identifying of runways deformations. Planning and optimization approach procedure based on a detailed terrain model and analyze the obstacles. A large area of survey data allows to use it in case of a complete redesign of the airport and runways. Distance to vegetation

24 Applications of LiDAR Airports

25 Applications of LiDAR Mining industry DESIGN AND JUSTIFICATION OF INVESTMENT FOR MINING ACTIVITIES MONITORING OF EXISTING OBJECTS MINE SURVEYING OF GROUND AND UNDERGROUND MINES

26 Applications of LiDAR Mining industry Carrying out engineering surveys on the territory of new fields (development of new sites); Precision survey of facilities, mine manufactories and adjacent areas for the design and reconstruction; Monitoring of ground surface;

27 Applications of LiDAR Mining industry 3D modeling of quarries; Assessment of displaced rock volume; Emergency assessment and survey of disasters; Virtual modeling of mining areas.

28 Results of the works DIGITAL ORTHOPHOTO WITH FINAL RESOLUTION FROM 5 CM PER PIXEL Digital orthophotos are used everywhere, where simultaneous visual estimation or monitoring of development of certain natural and development processes is required. Digital or thophoto is used as: 1. basis for creation of maps and plans; 2. online monitoring of the condition of objects and processes; 3. texture mapping of digital terrain models etc. DIGITAL TERRAIN MODELS AND RELIEF IN THE FORM OF POINT CLOUD OF LASER REFLECTIONS This type of product benefits in high speed of operation and high accuracy of received data. This type of products is a primary product of LiDAR scanning, nevertheless these materials provide a complete 3Dpicture of the area and object at the period of LiDAR scanning, what enables using it to solve application tasks: 1. Establishing any geometric parameters of the area and objects distances, dimensions, altitudes etc. 2. Construction of profiles and crosssections Decoding of objects. Performance of works on design and monitoring of conditions of the objects and area. 5. Using as basis to build maps and plans. TOPOGRAPHIC PLANS By results of LiDAR and digital aerial survey topographic plans, maps and profiles of the whole scale range are created. One or another scanning method is used with regard to dimensions, position of the object and required accuracy. For scales from 1:1000, inclusive, and less, aerial scanning is usually used in combination with aerial sur vey.

29 Results of the works 3D-MODELS OF AREAS AND OBJECTS One of the most popular results of works on LiDAR. On the basis of point cloud 3D-models reflecting actual dimensions and shape of the objects are created. By results of LiDAR models of industrial enterprises, municipal districts, architectural monuments, engineering constructions and other objects are created. 3D-imaging of the object is used: 1. for 3D-design; 2. for creation of GIS; 3. for creation of multi-media products. BUILDING DRAWINGS AND CROSS- SECTIONS OF EXISTING OBJECTS Based on scanning data (mobile and terrestrial) classic two-dimensional drawings and cross-sections are created. For significant volumes and objects of complex configuration use of LiDAR enables significant reducing costs for making drawings and cross- sections.

30 High detailed ortophoto

31 Raw laser data colored by photo

32 Raw laser data colored by elevation

33 Classified laser data

34 Digital surface model

35 Digital terrain model

36 Topographic plan

37 Topographic plan and profile

38 GeoProjectSurvey corporate branches Moscow Bldg 17, 26 Andronovskoe Shosse, , MOSCOW Tel.: +7 (495) , +7 (495) VOLGOGRAD 41 Rokossovskogo St, Tel.: +7 (8442) KRASNODAR 3 Sormovskaya St, Krasnodar, Krasnodar Territory Tel.: +7 (861) MIRNY 4a Stroiteley St, Mirny, Republic of Sakha (Yakutia) Tel.: +7 (985) NOVOSIBIRSK 36 Stantsionnaya St, Novosibirsk, Novosibirsk Region Tel.: +7 (383) SARATOV 187/213 Rakhov St, , Saratov, Saratov Region Tel.: +7 (8452) SURGUT 19 Domostroiteley St, Surgut, Khanty-Mansi Autonomous Area Yugra, Tyumen Region Tel.: +7 (985) ULYANOVSK 5 Spasskaya St, Ulyanovsk, Ulyanovsk Region Tel.: +7 (8422) KHABAROVSK 26a Turgeneva St, Khabarovsk, Khabarovsk Territory Tel.: +7 (4212) KHARKIV 199, Moskovskiy Prospekt, Kharkiv, Kharkiv Region, Ukraine ROSTOV-ON-DON 80 Budenovsky Prospekt, , Rostov-on-Don, Rostov Region Tel.: +7 (863)

39