Land Surveying and related services using Mobile LiDAR Survey
Mobile LiDAR Survey, mounted on car, rail and boat
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Mobile LiDAR Survey provide a permanent record of site conditions that can be measured at any time after the initial collection of point data. Users can remotely measure length, volume, elevation, deflection, smoothness, camber, curvature, and ect. We process the data to a survey-grade accuracy and deliver the 3D CAD file. So, our clients can use to find lane width, sidewalk width, and building dimensions, and other.
Mobile LiDAR system has been utilized along navigable corridors for a variety of applications including highway engineering surveying, infrastructure analysis and inventory, pavement analysis, urban modeling, hill roads, and railways. It has x, y and z coordinates, which makes it incredibly easy to produce the 3D representations. Mobile Lidar system has been scanned significantly more efficient than Conventional and static TLS. For example, in 2016, an 90 km stretch of highway was surveyed using TLS, and in 2018, the same highway was scanned using Mobile LiDAR. The field time required to survey with the conventional method was 120 working days, while the Mobile LiDAR was able to capture all the data in five hours. Mobile LiDAR can provide survey/engineering accuracy data faster than static scanning. Airborne systems (with the exception of low-flying helicopter/Drone) generally do not provide survey/engineering accuracy or quality data.
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Erode - Karur - Dindigul Railway Doubling Survey, Tamil Nadu
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Terrain elevations play a crucial role during the construction of roads, large buildings and bridges.
The 'Leica Pegasus: Two' and its typical sensor suites is shown above picture. It consists of both data acquisition sensors and positioning sensors. The data acquisition sensors primarily consist of a calibrated LiDAR and digital camera suite. The LiDAR sensor is capable of producing 10,00,000 points/second and the camera suite captures a 360◦ horizontal field of view (FoV) to provide both texture/color information. The positioning sensors include a GNSS receiver that provides the GPS, with an additional IMU and distance measuring instrument (DMI) that obtains odometry information for integrated position correction |
We help our client by providing survey-grade accuracy data within the time schedule. So that concerned parties can draw necessary conclusions more easily. We do mobile LiDAR Survey for roads more than 3600 km / every year for various type clients i.e., Governments, Construction companies, Consulting Engineers, and Road/Rail Designers. |
Field of Application
Bridges SurveySurveying and mapping for Bridges, ROBs, RUBs, FOBs and other Major Structures. New and Maintenance Projects
Metro Rail & Rapid TransportSurvey for new Metro Rail, MRTS, and other rapid transport projects by using LiDAR and photogrammetry technology
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National HighwaysSurvey for Feasibility, DPR, TOT, Construction and As-built projects. Delivering CAD, Point Cloud data Ortho Images& 360 degree images
City SurveySurvey for Smart City, Town Planning, Water & Sewage projects, New Residential Towns, Satellite cities, Urban Development, Metro Rail, GIS
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Railway SurveyNew Line, Doubling, Sidings, Yard Survey, Railway asset mapping, quantity assessment, and Final location survey
Data Post Processing & GISLiDAR Point Cloud to CAD drawings, Photogrammetry Processing, Line works, etc for Survey agencies.
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FAQ
1) What is LiDAR? |
2) What is LiDAR Survey? |
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Lidar means “light detection and ranging.” It is sometimes called “laser scanning” or “3D scanning.” A typical lidar sensor emits pulsed light waves. These pulses bounce off surrounding objects and return to the sensor. The sensor uses the time it took for each pulse to return to the sensor to calculate the distance it traveled. Repeating this process millions of times per second creates a real-time 3D map.
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LiDAR Scanner uses the pulse from a laser to collect measurements to create 3D models and maps of objects above the surface. The system calculates how long it takes for beams of light to hit an object or surface and reflect back to the laser scanner. The distance is then calculated using the velocity of light. LiDAR scanning units can fire million of pulses per second. Each of these pulsed laser measurements, or returns, can be processed into a 3D visualisation known as a ‘point cloud.’
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3) What is Point Cloud?A point cloud is made up of millions of points within the scans captured by a 3D laser scanner. These points represent a point on the surface of, for instance, a scanned building. The scanner automatically combines the vertical and horizontal angles created by the laser beam to calculate a 3D XYZ coordinate position for each point to produce a set of 3D coordinate measurements.
The point cloud data can then be transformed into a digital 3D model that gives you an accurate detailed picture of AOI (Area of Interest). The denser the points, the more detailed the representation, which allows smaller features and texture details to be more clearly and accurately defined. |
4) What are benefits of LiDAR Surveying? 1) Fast method of surveying
2) Collects Extremely Dense Data 3) Results are highly accurate 4) Can be mounted on to Cars, Trains, Boats or Drones 5) LiDAR systems work relatively safety and can be operated remotely Mobile lidar scans very close to ground. So, it is prefered for Highway and railway survey. Drone lidar can be operated over hazardous and inaccessible area, i.e., forests and mashy lands. So, it is prefered for Green Field Alignments, bypasses and re-alignments. |
5) How much is it cost for lidar survey? |
6) Where the places you work? |
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Based on the scope of work, required accuracy , size of the project, location of the project and list of deliverable, we quote between Rs.1,000/- to Rs.12,000/- per acre. For linear projects kindly send us the Area of Interest (kml) and survey specficiations. We send a free quotation.
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Goodland works in all over India include Andaman Nichobar Islands for surveying and mapping. We also worked in Addu (Maldives), Gabon (Africa), Brisbane (Australia) and Gulf countries. We takes LiDAR data post processing from many countires.
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Metro Rail Extension Survey at Chennai
Mobile LiDAR Survey: Workflow
Our Technical WorkflowGround Control & Benchmarking
- Primary Control Points: Established using Differential GPS (DGPS) for survey-grade accuracy, providing a robust foundation for all measurements.
- Secondary Control Points: Fixed with Real-Time Kinematic (RTK) DGPS or Total Station Traverse Survey, ensuring consistent precision across the project area.
- Benchmark Establishment: Conducted via Auto Level Survey to create reliable elevation references.
- Ground Control Points (GCPs) Fixing/Marking: Strategically placed and marked for seamless integration with Mobile LiDAR data.
- DGPS Static Base Observation: Performed to control the Mobile LiDAR trajectory, ensuring positional accuracy throughout the survey.
- Initialization Process:
- Static alignment for 10 minutes to stabilize the system.
- IMU Activation: Calibrated with dynamic runs to optimize inertial measurement unit performance.
- Camera Color Calibration: Fine-tuned for vibrant, accurate 360° panoramic imagery.
- Project Route Survey: High-speed, high-density data capture using Mobile LiDAR along the designated path, covering terrain, structures, and features with precision.
- Shadow Area Coverage: Supplemented with RTK DGPS or Handheld LiDAR to fill gaps in occluded zones.
- Bridge & Waterway Surveying: Specialized techniques to integrate detailed structural and hydrographic data with Mobile LiDAR outputs.
- Data Download & Transfer: Securely transferred to our office for immediate pre-processing.
- Pre-Processing: Raw data cleaned and optimized for accuracy.
- Trajectory Adjustments: Fine-tuned to align with DGPS and GCPs for centimeter-level precision.
- Point Cloud Colorization: Enhanced with calibrated imagery for realistic visualization.
- GCPs Matching: Ensures alignment between ground truth and LiDAR data.
- Point Cloud Generation: Exported in LAS format for compatibility with industry-standard software.
- 360° Panoramic Imagery: High-resolution visuals for comprehensive site analysis.
- Unmatched Accuracy: Leveraging DGPS, RTK, and Total Station technologies for survey-grade results.
- Efficiency at Scale: Rapid data collection across large highway / railway projects
- Versatile Applications: Ideal for road networks, railway network, urban planning, bridge inspections, waterway mapping, and more.
- End-to-End Expertise: From control point establishment to final point cloud delivery, we handle it all.
- Transportation: Detailed road and rail corridor mapping.
- Infrastructure: Bridge, tunnel, and utility surveys.
- Environmental: Terrain and waterway analysis.
- Construction: As-built documentation and planning.