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Mobile Laser Scanning for Rail Applications
SAM Inc. Overview <ul><li>Founded in 1994 </li></ul><ul><li>Three Offices In Texas:  Austin (HQ), Dallas, Houston </li></u...
A mobile mapping solution that incorporates LiDAR, cameras,  position, and navigation (GPS & Inertial Measurement Unit – I...
System Configuration <ul><li>Dual LiDAR sensors doubles coverage  area & improves data resolution </li></ul><ul><li>Scanni...
Specifications <ul><li>LiDAR sensors: 2 </li></ul><ul><li>Cameras: currently 2 5-mega pixel, integrating 2 additional 5- m...
What Are We Collecting?
Mobile Laser Scanning Applications: <ul><li>Asset Inventory Data </li></ul><ul><li>Rail Yards – Rails, Yard Roads, Yard Fa...
Data Processing <ul><li>Point Clouds and imagery provide a wealth of information  </li></ul><ul><li>They are very large an...
Data Classification Initial Post Processing Feature Extraction
Data Formats <ul><li>Data can be output into to numerous formats </li></ul><ul><li>The final deliverable products are depe...
Project Example <ul><li>Commuter Rail Line  </li></ul><ul><ul><li>32 miles long </li></ul></ul><ul><ul><li>Collected in on...
GIS MAPPING <ul><li>Controlled Using GPS Base stations </li></ul><ul><li>Full Asset Collection </li></ul><ul><ul><li>Plani...
<ul><li>Data Output  </li></ul><ul><li>ESRI ArcGIS  </li></ul><ul><li>Feature attribution for signage </li></ul><ul><li>In...
<ul><li>Controlled Using GPS Base stations and targeted ground control </li></ul><ul><li>Less than .1 foot  spatial accura...
<ul><li>Data Output  </li></ul><ul><li>Micron Station and GeoPak </li></ul><ul><li>Integrated with other available GIS dat...
Design Mapping
Summary/Benefits <ul><li>High density/high accuracy system </li></ul><ul><li>Flexible data formats to meet various end use...
Summary/Benefits <ul><li>Safety – for field crews and rail facilities (the Laser Sensor’s Classification is Class 1 eye-sa...
QUESTIONS ? Chris Formeller, CP, RPP Senior Project Manager Surveying & Mapping, Inc. (SAM, Inc.) 5508 West Highway 290, B...
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Spar 2010 Presetation

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Mobile Mapping

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Spar 2010 Presetation

  1. 1. Mobile Laser Scanning for Rail Applications
  2. 2. SAM Inc. Overview <ul><li>Founded in 1994 </li></ul><ul><li>Three Offices In Texas: Austin (HQ), Dallas, Houston </li></ul><ul><li>140+ Employees </li></ul><ul><li>Mobile and HDS Laser Scanning </li></ul><ul><li>Aerial Mapping </li></ul><ul><li>GIS Services </li></ul><ul><li>Land Surveying </li></ul><ul><li>Subsurface Utility Engineering </li></ul>
  3. 3. A mobile mapping solution that incorporates LiDAR, cameras, position, and navigation (GPS & Inertial Measurement Unit – IMU)
  4. 4. System Configuration <ul><li>Dual LiDAR sensors doubles coverage area & improves data resolution </li></ul><ul><li>Scanning Speeds up to 60mph </li></ul><ul><li>Less laser shadowing </li></ul>
  5. 5. Specifications <ul><li>LiDAR sensors: 2 </li></ul><ul><li>Cameras: currently 2 5-mega pixel, integrating 2 additional 5- mega pixel for 360 degree view of scan area </li></ul><ul><li>Scanner field of view: 360 degrees </li></ul><ul><li>Laser System measurement rate: 400,000 points per second </li></ul><ul><li>System Maximum Range: 1200’ </li></ul><ul><li>Relative accuracy (points within scan data): 0.023’ </li></ul><ul><li>Absolute accuracy: 0.164’ </li></ul><ul><li>Assumes good GPS quality, Accuracy maybe improved via post- processing techniques </li></ul><ul><ul><ul><li>(Real world applications achieving 0.08’ with a good GPS solution) </li></ul></ul></ul><ul><li>Laser classification: IEC/CDRH Class 1 eye-safe </li></ul>
  6. 6. What Are We Collecting?
  7. 7. Mobile Laser Scanning Applications: <ul><li>Asset Inventory Data </li></ul><ul><li>Rail Yards – Rails, Yard Roads, Yard Facilities, etc </li></ul><ul><li>Under Cutting Projects – Bridges & Track Profiles </li></ul><ul><li>Clearance Information – Bridge and Tunnel Data, High & Wide Routes, Gap Analysis @ Station Platforms, etc </li></ul><ul><li>Engineering Design Data </li></ul><ul><li>Rail Bed Profiles </li></ul>
  8. 8. Data Processing <ul><li>Point Clouds and imagery provide a wealth of information </li></ul><ul><li>They are very large and need to be “Mined” to maximize their utility </li></ul><ul><li>Data sets can be used repeatedly for different projects </li></ul><ul><li>Point Cloud data can be processed to meet specific requirements and data format for each project </li></ul>
  9. 9. Data Classification Initial Post Processing Feature Extraction
  10. 10. Data Formats <ul><li>Data can be output into to numerous formats </li></ul><ul><li>The final deliverable products are dependant on end users needs </li></ul><ul><li>Many data types will work within multiple environments </li></ul>
  11. 11. Project Example <ul><li>Commuter Rail Line </li></ul><ul><ul><li>32 miles long </li></ul></ul><ul><ul><li>Collected in one day </li></ul></ul><ul><li>Two deliverable types and two different control methods and accuracy standards to produce </li></ul><ul><ul><li>GIS Mapping </li></ul></ul><ul><ul><li>Engineering Design Data </li></ul></ul>
  12. 12. GIS MAPPING <ul><li>Controlled Using GPS Base stations </li></ul><ul><li>Full Asset Collection </li></ul><ul><ul><li>Planimetric mapping </li></ul></ul><ul><ul><li>Topographic Mapping </li></ul></ul><ul><ul><li>Utilities </li></ul></ul><ul><ul><li>Rail Features </li></ul></ul><ul><ul><li>Rail Geometry </li></ul></ul>
  13. 13. <ul><li>Data Output </li></ul><ul><li>ESRI ArcGIS </li></ul><ul><li>Feature attribution for signage </li></ul><ul><li>Integrated with other available GIS data sets </li></ul>GIS MAPPING
  14. 14. <ul><li>Controlled Using GPS Base stations and targeted ground control </li></ul><ul><li>Less than .1 foot spatial accuracy </li></ul><ul><li>Full topographic mapping for appr. 2 miles </li></ul>Design Mapping
  15. 15. <ul><li>Data Output </li></ul><ul><li>Micron Station and GeoPak </li></ul><ul><li>Integrated with other available GIS data sets </li></ul>Design Mapping
  16. 16. Design Mapping
  17. 17. Summary/Benefits <ul><li>High density/high accuracy system </li></ul><ul><li>Flexible data formats to meet various end user needs </li></ul><ul><li>Capture scan points once – ability to complete data “mining” for multiple projects </li></ul><ul><li>Provides accurate positions for all scanned points, including the sizeable percentage of railroad elements that are inaccessible or difficult to target and locate even with the use of reflectorless total stations </li></ul>
  18. 18. Summary/Benefits <ul><li>Safety – for field crews and rail facilities (the Laser Sensor’s Classification is Class 1 eye-safe) </li></ul><ul><li>Limited track time needed means less time “fouling” the tracks to produce surveys </li></ul>
  19. 19. QUESTIONS ? Chris Formeller, CP, RPP Senior Project Manager Surveying & Mapping, Inc. (SAM, Inc.) 5508 West Highway 290, Building B, Austin, Texas 78735 tel 512.447.0575 dir 512.493.0207 fax 512.326.3029 cell 512.773.6957 [email_address]

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