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Remote Sensing For Environmental Impact And Monitoring
Remote Sensing For Environmental Impact And Monitoring
Remote Sensing For Environmental Impact And Monitoring
Remote Sensing For Environmental Impact And Monitoring
Remote Sensing For Environmental Impact And Monitoring
Remote Sensing For Environmental Impact And Monitoring
Remote Sensing For Environmental Impact And Monitoring
Remote Sensing For Environmental Impact And Monitoring
Remote Sensing For Environmental Impact And Monitoring
Remote Sensing For Environmental Impact And Monitoring
Remote Sensing For Environmental Impact And Monitoring
Remote Sensing For Environmental Impact And Monitoring
Remote Sensing For Environmental Impact And Monitoring
Remote Sensing For Environmental Impact And Monitoring
Remote Sensing For Environmental Impact And Monitoring
Remote Sensing For Environmental Impact And Monitoring
Remote Sensing For Environmental Impact And Monitoring
Remote Sensing For Environmental Impact And Monitoring
Remote Sensing For Environmental Impact And Monitoring
Remote Sensing For Environmental Impact And Monitoring
Remote Sensing For Environmental Impact And Monitoring
Remote Sensing For Environmental Impact And Monitoring
Remote Sensing For Environmental Impact And Monitoring
Remote Sensing For Environmental Impact And Monitoring
Remote Sensing For Environmental Impact And Monitoring
Remote Sensing For Environmental Impact And Monitoring
Remote Sensing For Environmental Impact And Monitoring
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Remote Sensing For Environmental Impact And Monitoring

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  • Used from the air can detail electrical lines or....
  • Used from the air can detail electrical lines or....
  • CASI principle of operation The system has a "pushbroom" configuration, ie the full swath width is imaged instantaneously in a large number of spectral wavebands (up to 288) covering the visible and near infra-red regions of the spectrum between 430nm and 900nm. This can be used to construct hyperspectral image data sets for detailed studies of ground or water targets. Spatial resolution can be varied from one to ten metres, and is governed by the flying altitude Examples of CASI Mapping and classification of wetland vegetation Mapping and classification of benthic habitat Identifying mineral composites Identifying specific agricultural crops Mapping bathymetry in near-shore environments Mapping the benthic community in near-shore environments Identifying forest structure and composition Identifying soil types
  • Earthquake in California 1999
  • Measure impact of flooding, in this case 0.25m increments.
  • Earthquake in California 1999
  • Radar comparisons of before and after calculated as phase difference and illustrated by crests, each 25mm in movement.
  • Total movement is shown as contour map.
  • Total movement is shown as contour map.
  • Orthophotomap
  • Orthophotomap
  • Trend towards countrywide data sets – driven by insurance industry in GB as well as the EA’s obligation to flood management and monitoring Increasing use of space borne sensors Increasing accuracy of geospatial information
  • Trend towards countrywide data sets – driven by insurance industry in GB as well as the EA’s obligation to flood management and monitoring Increasing use of space borne sensors Increasing accuracy of geospatial information
  • Trend towards countrywide data sets – driven by insurance industry in GB as well as the EA’s obligation to flood management and monitoring Increasing use of space borne sensors Increasing accuracy of geospatial information
  • Trend towards countrywide data sets – driven by insurance industry in GB as well as the EA’s obligation to flood management and monitoring Increasing use of space borne sensors Increasing accuracy of geospatial information
  • Transcript

    • 1. <ul><li>Flood modelling and management </li></ul><ul><li>Glasgow University </li></ul><ul><li>September 8 2004 </li></ul><ul><li>Paul Shaw - GeoVision </li></ul>
    • 2. <ul><li>Remote sensing for environmental impact and monitoring </li></ul><ul><li>Video </li></ul><ul><li>Hydrographic LIDAR </li></ul><ul><li>Hyper-spectral sensing </li></ul><ul><li>INSAR from space </li></ul><ul><li>3d visualisation </li></ul>
    • 3. <ul><li>Remote sensing for environmental impact and monitoring </li></ul><ul><li>Video </li></ul><ul><li>Hydrographic LIDAR </li></ul><ul><li>Hyper-spectral sensing </li></ul><ul><li>INSAR </li></ul><ul><li>3d visualisation </li></ul>
    • 4. <ul><li>Video </li></ul><ul><li>Digital video taken from helicopter </li></ul><ul><li>Each video frame aligned with a GPS position </li></ul><ul><li>Background map and video integrated into GIS </li></ul><ul><li>GIS functionality allows extra inputs and database interrogation </li></ul><ul><li>Uses include environmental monitoring and impact </li></ul><ul><li>The following examples are from a software called GeoFilm developed by RSK Orbital - Link </li></ul>
    • 5. <ul><li>Remote sensing for environmental impact and monitoring </li></ul><ul><li>Video </li></ul><ul><li>LIDAR – Light Detection and Ranging </li></ul><ul><li>Hyper-spectral sensing </li></ul><ul><li>INSAR </li></ul><ul><li>3d visualisation </li></ul>
    • 6. <ul><li>Hydrographic LIDAR </li></ul><ul><li>Uses Blue/Green part of the EM spectrum to penetrate water </li></ul><ul><li>Operates up to 60m depth in clear water </li></ul><ul><li>Survey up to 30 sq km in 1 hour </li></ul><ul><li>Horizontal accuracy – 3m, vertical accuracy 0.15m </li></ul><ul><li>4m maximum grid </li></ul><ul><li>Examples of Optech ‘Shoals’ system at Link </li></ul>
    • 7. <ul><li>LIDAR – Other uses </li></ul><ul><li>Natural resource management </li></ul><ul><li>Chemical and biological detection and analysis </li></ul><ul><li>Wind field profiling </li></ul><ul><li>Atmospheric aerosols and cloud studies </li></ul><ul><li>Ozone depletion, climate change, global transport of pollutants </li></ul><ul><li>Urban pollution, dust transport </li></ul><ul><li>Polar cloud monitoring </li></ul><ul><li>Examples at Link </li></ul>
    • 8. &nbsp;
    • 9. &nbsp;
    • 10. <ul><li>Remote sensing for environmental impact and monitoring </li></ul><ul><li>Video </li></ul><ul><li>LIDAR – Light Detection and Ranging </li></ul><ul><li>Hyper-spectral sensing </li></ul><ul><li>INSAR </li></ul><ul><li>3d visualisation </li></ul>
    • 11. <ul><li>Hyper-Spectral Sensors </li></ul><ul><li>CASI - Compact Airborne Spectrographic Imager </li></ul><ul><li>Pushbroom scanner </li></ul><ul><li>Measures up to 288 wavebands simultaneously in the visible and near infrared regions </li></ul><ul><li>Can identify specific vegetation, minerals or rock because each has a unique absorption characteristic in a defined wavelength </li></ul><ul><li>Resolution up to 1m </li></ul><ul><li>Examples at Link and link </li></ul><ul><li>New research into satellite sensors – Link </li></ul>
    • 12. <ul><li>Modern Remote Sensing Technologies </li></ul><ul><li>Video </li></ul><ul><li>LIDAR – Light Detection and Ranging </li></ul><ul><li>Hyper-spectral sensing </li></ul><ul><li>INSAR </li></ul><ul><li>3d visualisation </li></ul>
    • 13. <ul><li>INSAR – Interferometric SAR </li></ul><ul><li>ERS, Radarsat or ENVISAT available satellites </li></ul><ul><li>Measure phase difference from ‘before and after’ </li></ul><ul><li>Millimetre accuracy from space </li></ul><ul><li>Applications include earthquakes, subsidence, landslips, dam movement </li></ul>
    • 14. Phase changes original ground position displaced ground position satellite position at first acquisition satellite position at second acquisition Different signal path lengths means difference in signal phase Slide courtesy of NPA associates, UK
    • 15. &nbsp;
    • 16. &nbsp;
    • 17. &nbsp;
    • 18. &nbsp;
    • 19. Stoke-on-Trent – displacement between 18-Oct-93 &amp; 28-Feb-96 (Picture courtesy NPA Group)
    • 20. <ul><li>Remote sensing for environmental impact and monitoring </li></ul><ul><li>Video </li></ul><ul><li>LIDAR – Light Detection and Ranging </li></ul><ul><li>Hyper-spectral sensing </li></ul><ul><li>INSAR </li></ul><ul><li>3d visualisation </li></ul>
    • 21. <ul><li>3 Dimensional Visualisation </li></ul><ul><li>Ortho-rectified imagery can be combined with design information to create 3 dimensional virtual reality </li></ul>
    • 22. &nbsp;
    • 23. &nbsp;
    • 24. <ul><li>Link to video </li></ul>
    • 25. <ul><li>Summary </li></ul><ul><li>Over the last 10 years LIDAR, CASI, SAR, high resolution satellite imagery and RTK GPS have been introduced. </li></ul><ul><li>These technologies have been adapted and integrated with other technologies like video to solve many geospatial information issues. </li></ul>
    • 26. <ul><li>.......................and the next 10 years? </li></ul>
    • 27. <ul><li>Questions? </li></ul>

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