LiDAR

Aerial LiDAR (Light Detection and Ranging) refers to a remote sensing / mapping technology that uses a calibrated scanning laser to measure range and bearing to the terrain from a moving airborne platform. Using either a fixed wing or rotary wing platform equipped with a GPS receiver and IMU sensor, Tuck Mapping is able to acquire precise location information. Utilizing the full waveform capabilities of our sensors, the first returns define reflective surface models, second returns are used to characterize tree canopies and the third return produces a bare earth model. Additional returns further define and delineate man-made features or increase the likelihood of penetration through dense canopy. The intensity of the returns can also be recorded and analyzed to provide valuable information such as tree species and health or surface characteristics. After post-flight production processes, we are able to produce precise elevation data and geospatial location of features on the earth’s surface.

The LiDAR data collected by Tuck Mapping is an accurate and effective method for creating three-dimensional topographical aerial maps and highly accurate aerial surveys of both surface terrain elements and man-made structures. Tuck Mapping has developed a custom LiDAR Mapping production workflow which adheres to the specifications outlined in the USGS LiDAR Base Specification Guidelines.

Based on several years of experience with LiDAR collection and processing, Tuck Mapping developed the eagleeye mapping system® which is a fully integrated helicopter-based aerial mapping system that simultaneously obtains LiDAR and digital photography. This helicopter-based system is specifically designed for low altitude mapping where extreme accuracy is required for engineering design along with high-resolution digital photography for orthophotography production. Accuracy is the feature hallmark of the eagleeye mapping system® . This system can obtain vertical accuracy as precise as 1/2″- 2″ and has the flexibility to obtain better accuracy levels to match client needs.

BREAKING NEWS

Using the principles of the eagleeye mapping system®, Tuck Mapping now has the capability to collect full waveform LiDAR data and high resolution large-format digital imagery from our twin-engine Piper Navajo. This aircraft is equipped with a Vexcel UltraCam Falcon Prime large format digital camera and a RIEGL LMS-Q680i full waveform LiDAR system. Acquiring this data simultaneously not only increases our accuracy, but provides a more cost-effective solution to our clients.

EQUIPMENT

All aircraft and helicopters are equipped with a precisely surveyed Global Positioning System (GPS) antenna capable of receiving highly accurate positional signals. Additionally, each aircraft is equipped with a flight management system, which provides precision navigation guidance to flight crews during data collection, as well as functionality for project management and data logging. Sensor platforms are supplemented with a combination of additional equipment including gyro-stabilized mounts, dual frequency GPS receivers, and inertial measurement units (IMU). Tuck Mapping owns three RIEGL Laser Scanning Systems:

  • Riegl VQ-480 Laser Scanner
    • Laser Pulse Rate: 300,000 Hz
    • Flight Altitude: 500-3,000 ft. Above Ground Level (AGL)
    • Swath Width: 300-3,000 ft. (function of flying height)
    • Laser Wave Length: 1550 µm
    • Scan Angle: +/- 30 degrees (60-degree swath)
    • Beam Divergence: 0.3 mrads
    • Intensity: 16-bit GeoTIFF Intensity Imagery
    • Point Density: Typically, 40 to 60 points per square meter
    • Scanning Mechanism: Rotating polygon mirror
    • Scan Pattern: Parallel scan lines
  • Riegl LMS-Q560 60 Laser Scanner
    • Laser Pulse Rate: 240,000 Hz
    • Flight Altitude: 300-3,000 ft. Above Ground Level (AGL)
    • Swath Width: 300-3,000 ft. (function of flying height)
    • Laser Wavelength: 1064 µm
    • Scan Angle: +/- 30 degrees (60-degree swath)
    • Beam Divergence: < 0.5 mrads
    • Intensity: 8-bit GeoTIFF Intensity Imagery
    • Point Density: Typically, 40 to 60 points per square meter
    • Scanning Mechanism: Rotating polygon mirror
    • Scan Pattern: Parallel scan lines
  • Riegl LMS – Q680i Laser Specification
    • Laser Pulse Rate: 400,000 Hz
    • Flight Altitude: 500-5,000 ft. Above Ground Level (AGL)
    • Swath Width: 500-5,000 ft. (function of flying height)
    • Laser Wavelength: 1550 µm
    • Scan Angle: +/- 30 degrees (60-degree swath)
    • Beam Divergence: < 0.5 mrads
    • Intensity: 16-bit GeoTIFF Intensity Imagery
    • Point Density: Typically, 40 to 60 points per square meter
    • Scanning Mechanism: Rotating polygon mirror
    • Scan Pattern: Parallel scan lines

The final project deliverables are reviewed and approved by a registered surveyor and/or certified photogrammetrist before delivery to the client.

DELIVERABLES

  • Raw LAS files
  • Bare Earth LAS files
  • Classified LiDAR Data
  • Building Footprints
  • 3D Modeling
  • Powerline Classification and Vectorization
  • Breakline Generation
  • Contour Generation
  • Volumetric Studies
  • 3D Perspective Analysis
  • Vegetation Mapping
  • Shoreline Analysis
  • Corridor Studies
  • Transportation Mapping
  • Engineering Applications
  • Solar Installation Planning
  • Digital Elevation Models (DEM)
  • Digital Surface Models (DSM)
  • Digital Terrain Models (DTM)

APPLICATIONS

  • 3D Modeling
  • Floodplain Evaluation
  • Disaster Management
  • Coastal Erosion Tracking
  • Railroad Mapping
  • Site Design
  • Airport Mapping including Obstruction Surveys
  • Airport Facilities Survey
  • Land Use Mapping and Planning
  • Volumetric Studies
  • Utilities Corridor Monitoring
  • Bridge and Stream Surveys
  • Transportation Planning
  • Post-Incident Responding
  • Water and sewer design mapping
  • Surface mine pit maps
  • High-detail city mapping
  • Engineering Applications
  • Urban Planning
  • Solar Installation Planning
  • Forestry

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