Remote Sensing: Definition and Applications
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Questions and Answers

Which application of remote sensing is specifically related to water quality?

  • Atmospheric applications
  • Benthic cover mapping (correct)
  • Agriculture
  • Military reconnaissance

    • What spectral range does the Green band of QuickBird Image capture?

  • 0.76-0.90 um
  • 0.45-0.52 um
  • 0.63-0.69 um
  • 0.52-0.60 um (correct)

    • Which of the following is NOT a use of remote sensing?

  • Monitoring environmental issues
  • Natural resource inventories
  • Urban & regional planning
  • Personal fitness tracking (correct)

    • What does the NIR band in the QuickBird Image range from?

    <p>0.76-0.90 um</p> Signup and view all the answers

    Which remote sensing technique was used to observe the changes in Mt. Pinatubo's lahar deposits?

    <p>SPOT imaging</p> Signup and view all the answers

    What is the primary advantage of remotely-sensed data in terms of temporal consistency?

    <p>It provides a permanent record of the entire area of interest.</p> Signup and view all the answers

    Which factor affects whether remote sensing is the best method for acquiring environmental information?

    <p>The cost and administrative structure of data collection.</p> Signup and view all the answers

    How does remotely sensed data vary in terms of spatial position?

    <p>It can require interpolation based on environmental data.</p> Signup and view all the answers

    What is essential for effective change detection and mapping using remote sensing?

    <p>Collecting data at regular time intervals.</p> Signup and view all the answers

    What does the interaction of electromagnetic radiation (EMR) and material signify in remote sensing?

    <p>It allows for the extraction of reliable information from image data.</p> Signup and view all the answers

    What can be a limitation of remote sensing in terms of data acquisition?

    <p>Ability to capture images during cloudy conditions.</p> Signup and view all the answers

    Why is regular data collection important in remote sensing?

    <p>It ensures the consistency of data over time.</p> Signup and view all the answers

    How does the human visual system relate to remote sensing?

    <p>It helps derive information from images captured from an overhead view.</p> Signup and view all the answers

    What was the estimated theoretical mean seasonal solar PV power output in the Asia Pacific region?

    <p>17.47%</p> Signup and view all the answers

    Which typhoon is referenced in the meteorology section regarding typhoon tracking?

    <p>Super Typhoon ROSITA</p> Signup and view all the answers

    What was one of the dates mentioned that marked the aftermath of Typhoon Yolanda?

    <p>11/10/2013</p> Signup and view all the answers

    What type of data was used to identify fishing grounds in the Philippines?

    <p>Earth Observation Data</p> Signup and view all the answers

    During which significant natural event was sulfur dioxide amount measured around Mt. Bulusan?

    <p>Volcanic Eruption</p> Signup and view all the answers

    What phenomenon was monitored from 2018/10/28 to 2018/10/31?

    <p>Typhoon Tracking</p> Signup and view all the answers

    What percentage was the estimated theoretical solar PV power potential listed?

    <p>17.47%</p> Signup and view all the answers

    Which of the following is NOT mentioned in relation to disaster management?

    <p>Earthquake Preparedness</p> Signup and view all the answers

    Study Notes

    Remote Sensing: Definition and Applications

    • Remote sensing is the process of acquiring information about the earth's surface using images taken from an overhead perspective.
    • It uses electromagnetic radiation (EMR) reflected or emitted from the earth's surface in different regions of the electromagnetic spectrum.
    • The process is often used to study environmental issues and natural resources, like:
      • Topography
      • Drainage
      • Temperature
      • Tectonic motion
      • Urban and regional planning
      • Natural resource inventories
      • Monitoring environmental issues
      • Agriculture (crop forecasting, precision farming)
      • Geology, hydrologic studies
      • Land cover
      • Benthic cover mapping
      • Soil surveys (soil moisture)
      • Military reconnaissance
      • Atmospheric applications (precipitation, clouds, concentration of gases)
      • Ocean (temperature, color)
      • Renewable energy assessment

    Remote Sensing System: Considerations

    • The best method for acquiring information depends on the following:
      • Does the information required change with spatial position? (point observations, interpolation needed)
      • Is the information dependent on time? (data collection at regular intervals, for change detection and mapping)
      • Does the collection of required information affect the resource being monitored, cause time delays, or create administrative or cost issues? (timeliness)
      • Can the required information be reliably extracted from image data? (EMR-material interaction, cloud cover, day or night acquisition)
      • Can the information be obtained directly from data or through its relationship with other physical characteristics of the environment?

    Remote Sensing Examples:

    • Puerto Galera, Philippines:
      • QuickBird image data displayed in different bands: Blue (0.45-0.52 µm), Green (0.52-0.60 µm), Red (0.63-0.69 µm), NIR (0.76-0.90 µm)
      • True color composites (R-G-B) and false color composites (NIR-R-G) are used for visual interpretation.
    • Water Quality Mapping:
      • Remote sensing is used to monitor and assess water quality changes.
    • Mt. Pinatubo, Philippines:
      • RADARSAT radar backscatter image (February 1998) and SPOT image (December 1991) were used to study changes in the lahar deposits caused by the eruption.
    • Meteorology:
      • Typhoon tracking using satellite imagery data, like the example of Super Typhoon Rosita.
    • Disaster Management:
      • Visualization of the aftermath of Typhoon Yolanda (02/23/2012 vs. 11/10/2013) highlighting the impact of the disaster and post-disaster response.
    • Renewable Energy Assessment:
      • Estimated theoretical solar PV power potential (PPV) assessed using remote sensing data.
    • Fishing Ground Identification:
      • Machine learning applied to Earth Observation data for identifying fishing grounds in the Philippines.
    • Flood Extent Mapping:
      • Remote sensing used to map the extent of floods and understand their impact.
    • Volcanic Eruptions:
      • Mapping sulfur dioxide emissions surrounding Mt. Bulusan and Mt. Mayon during eruptions, using remote sensing data.

    Advantages of Remote Sensing

    • Provides a permanent record of an area at a point in time.
    • Data is relatively consistent spatially and temporally.
    • Does not interfere with the resources being measured.
    • Can provide direct information or insights using the relationship with other environmental characteristics.

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    Related Documents

    Remote Sensing Lecture Notes PDF

    Description

    Explore the fascinating world of remote sensing, a method of gathering information about the Earth's surface using overhead imagery. This quiz covers essential applications, from environmental monitoring to urban planning, highlighting the importance of remote sensing in various fields such as agriculture, geology, and military reconnaissance.

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