Nziht 9th Conference Applications Of Google Earth In Road Asset Management

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The goal of road asset management is to enable more effective resource allocation and utilization via quality informa¬tion and analyses, and to address infrastructure maintenance, operation, and improvement issues. Visualization of road condition data and road inventory data is important to achieve these goals. Due to this reason, more and more road controlling agencies have adopted geographical information system (GIS) as a useful tool for data visualization and integration. However, most of commercial-off-the-shelf (COTS) GIS software such as ArcGIS and MapInfo are expensive and require GIS specialists to operate and maintain them, which make it difficult to share the information in them by personnel working in different organizations. As a geographic browser, Google Earth (GE) provides a free, easy and fast and robust environment for users to explore the entire earth and to share annotations by using the keyhole markup language (KML). In this presentation, method and examples for applications of GE to visualize road condition data and inventory data through KML will be presented. The road condition data (either in network level or project level) can be shown in GE includes data collected from high speed data collection equipment (IRI, rutting, texture, skid resistance and geometry) and data from low speed equipment like FWD. The road inventory data can be shown in GE includes road maintenance works, road accident data and road images/video etc. Possibilities of road asset data integration through GE will also be discussed.

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Nziht 9th Conference Applications Of Google Earth In Road Asset Management

  1. 1. Google Earth Applications in Road Asset Management Dr Wei Liu Mr Bryce Tinkler Pavement Management Services Ltd
  2. 2. What is Google Earth • An interactive 3D mapping software capable of displaying any geography-related data; Google calls it “A 3D interface to the planet” • “Google Earth combines satellite imagery, maps and the power of Google Search to put the world's geographic information at your fingertips.” From Google Earth web site.
  3. 3. Inspiration for Google Earth • “Father of GIS” Roger Tomlinson, who in the late 1960’s wrote that the ultimate GIS which would be a computer globe of interactive data… • Michael Jones, CTO of Google Earth, Described Google Earth as GIS “for the 5.999999 billion people of the world’s 6 billion population who don’t know or care what GIS is”.
  4. 4. Google Earth Data • Satellite Imagery and Aerial Photos compiled from many different sources to cover the entire globe • 15m spatial resolution at coarsest, much higher for many areas • U.S. high resolution for many locations (1m, 0.7m, 0.3m). 0.15m aerials for Cambridge, MA and Google Campus. • Global: some 1m, some 0.7m in urban areas, UK has 15cm (6in) • Most less than 3 years old. Imagery being updated all the time
  5. 5. Features of Google Earth • 3D buildings in major cities across the World • 3D terrain showing mountains, valleys, and canyons around the world • Integrated Google Local search to find local information • Fast, dynamic navigation of driving directions • Easy creation and sharing of annotations among users using KML (Keyhole Markup Language)
  6. 6. 3D Buildings
  7. 7. Driving Directions
  8. 8. 3D Terrains
  9. 9. How does Google Earth work Retrieves satellite imagery Google Earth Google Earth Server Client Software Data encapsulated In KML format
  10. 10. How does Google Earth work • Three-dimensional geospatial data are managed in Google Earth using KML (Keyhole Markup Language) files • KML files are often distributed as KMZ, zipped KML files • The KML file specifies a feature (a placemark, image, or polygon) for Google Earth • It contains a basic description of the place, longitude, latitude, tilt and other information
  11. 11. Keyhole Markup Language (KML) • xml grammar and file format for describing geographic features in google earth/maps – Points – Lines – Polygons – Models – links • Google Earth processes kml files like web browsers process html files.
  12. 12. Your Data and KML • You have interesting data • How accessible is it? • Is it viewable in it’s geographic context? • How easy is it to share your data?
  13. 13. Your Data and KML • KML files can link to each other to represent arbitrarily large data sets. • KML is the universal format for presenting your data in Google Earth • Google Earth has *lots* of users. Users benefit from the common navigation UI in Google Earth. – Level of Detail – Zooming in/out – Flying around the virtual globe
  14. 14. Google Earth Applications in Road Asset Management • The goal of road asset management is to enable more effective resource allocation and utilization via quality information and analyses. • Visualization of asset management data is important to achieve these goals.
  15. 15. Google Earth Applications in Road Asset Management • However, – We don’t always make information easy to access… – Did not provide data in an “easy-to-use” format – Did not provide the spatial, temporal, or sector specific resolution many people need
  16. 16. Why Google Earth? • Generally up to date • Fast and robust • Large user community • Developer/programmer friendly • Easy to learn and use • Convenient for share and collaboration • Platform independent
  17. 17. Google Earth Application Examples • Visualization of Pavement Condition Data – Roughness – Rutting – Texture • Integration of Pavement Condition Data with Inventory Image • Integration of Rehabilitation Works with Videos • Presentation of Road Sign Recognition Results • Presentation of Road Accident Information
  18. 18. Roughness
  19. 19. Rut Depth
  20. 20. Texture Depth
  21. 21. Integration of Pavement Condition with Inventory Image
  22. 22. Integration of Rehabilitation Work with Road Video
  23. 23. Presentation of Road Sign Recognition Results
  24. 24. Presentation of Road Accident Information
  25. 25. Demo
  26. 26. Summary • Google Earth has just came out and it is already a popular software tool. • We are just beginning to see the ways that this application will be able to more easily convey information. • Tool that help us increase our knowledge and understanding of our world
  27. 27. Summary • Integration+Visualization+Collaboration • Low-cost, scalable publishing platform • It may become the next platform for surveying and mapping data visualization
  28. 28. Thank you! If any question or comment, please feel free to contact us wei.liu@pmsnz.co.nz bryce.tinkler@pmsnz.co.nz Phone: 07-8470499

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