G&AI was the first firm in the country to obtain the Pegasus:Two Mobile Mapping System (MMS). The Pegasus: Two is a safe, ideal tool for roadway corridor mapping projects requiring an extraordinary level of detail and accuracy. The system incorporates a state-of-the-art LiDAR sensor (1,100,000 points per second), seven high-definition cameras (stitched stereo panoramic imagery synchronized to the point cloud – for highly efficient asset identification), one pavement camera for pavement analysis, and precision positional/navigational equipment to collect rich data for asset inventories and design-grade mapping—at highway speeds.

G&AI feature extraction experts use a suite of multiple software packages to perform simultaneous data collection in both ESRI ArcMap and TopoDOT. 3D Data collection takes place in a TopoDOT environment, which is linked to a pre-defined ArcMap 3D geodatabase schema. The result is highly accurate 3D data that is collected once to be used in both design and GIS applications. G&AI provides flexibility and provides fully customized solutions to meet the needs of all of our clients.

In addition, CADD files derived from the MMS point cloud data and imagery can be merged with conventional aerial mapping and terrestrial scanning for a fully comprehensive solution. The resulting CADD data is seamless and appears to have been collected from a single dataset.

  • Roadway Corridor Mapping
  • Bridge Surveys
  • Design-Builds
  • Railway
  • Utility/Electric Corridor Mapping
  • Mobile LiDAR Data Fusion with:
    • Terrestrial Laser Scanning
    • Conventional Survey
    • Aerial Mapping
  • Condition Assessments
    • Pavement Condition
    • Curb/Sidewalk Assessments
    • Guardrail Condition
  • Four Certified Photogrammetrist and Licensed Surveyor/CADD Technicians
  • 12 digital aerial mapping/LiDAR workstations with the capability of delivering data in most commonly used CAD/GIS software formats (AutoCAD, MicroStation, ArcView, ArcGIS, etc.)
  • Strategically located for rapid mobilization to projects anywhere in the United States

Pegasus:Two

  • 360 degree video capture with six 4 megapixel cameras and one domed skyview camera
  • GPS updates positional fix of the coordinates once per second
  • Inertial Measurement Unit applies 200 corrections per second to the GPS coordinates
  • Video imagery of the Pegasus:Two allows the point cloud to be synchronized to create a virtual overlay of the dataset and video recording
  • Typical Accuracy of the Pegasus:Two is 2 cm horizontally and 1.5 cm vertically
  • Collects over 1.1 million points per second at 200 rps (revolutions per second)
  • Typical profile separation at 60 mph is approximately 10 cm
  • Capable of collecting up to 150 linear miles of data in a highway/rural setting per day, and up to 75 linear miles per day in an urban setting
  • One hour of linear data collection with the Pegasus:Two equates to approximately one hour of post processing time to extraction of features
  • Ability to collect survey-grade data day or night of all features (natural or man-made) within 120 meters of the LiDAR system including building facades, roadway striping, light poles, pavement, pavement cracks, open land and vegetation, manholes, curbs, river banks, power lines, water meters, fire hydrants and water valves
  • Delivery – data delivered in standard CAD formats, and immediately available in ESRI or other software packages
  • Safety – collection at posted highway speeds without risking personnel in traffic to collect road/rail/survey data
  • Cost and Schedule Effective
  • Flexibility to mount on any vehicle platform
  • Access to ESRI ArcGIS desktop through the Pegasus:Two software
  • Versatility
Data is natively collected in WGS84 and can be projected into any standard state plane projection or custom local coordinate system.

  • Pegasus:Two ArcGDS software runs as an extension of ESRI’s ArcMAP
  • Geospatially correct features are extracted directly from video and point cloud data and input directly into an ESRI geodatabase format
  • Features are collected using a predefined geodatabase schema using subtypes and attribute domains to ensure consistency
  • Video and point cloud are synchronized, which allows GIS features to be extracted from a 360 field of view from the cameras where the point cloud may be obscured by structures or passing vehicles
  • Point cloud can be exported to a LAS format usable in LAS datasets in ESRI software to create TIN’s, DEM’s, DSM’s. Existing color imagery can be draped over the LAS point cloud data to identify items like impervious surfaces or hydrologic features, color infrared to identify biomass concentration
  • Point cloud can also be colorized using RGB values from the video images and then exported to LAS data format
  • Enables quick and complete collection of data out to 120 meters either side of the mobile mapping system trajectory producing a seamless and comprehensive Enterprise Dataset and snapshot in time
  • Ideal for linear referencing systems such as pavement management, infrastructure and asset management, transportation corridor studies, pipeline route surveys, railroad right-of-way, building height and line of sight
  • Temporal Analysis and change mapping
  • Creates a geodetically correct collection of 3 dimensional data used for modeling and is complemented by corresponding video imagery all while within the ESRI environment
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