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GEOM 3002 Introduction to Air Photo Interpretation and Remote Sensing

GEOM 3002 Introduction to Air Photo Interpretation and Remote Sensing. Remote Sensing.

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GEOM 3002 Introduction to Air Photo Interpretation and Remote Sensing

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  1. GEOM 3002Introduction to Air Photo Interpretation and Remote Sensing Carleton University, GEOM 3002

  2. Remote Sensing • The art, science, and technology of obtaining reliable information about physical objects and the environment, through the process of recording, measuring and interpreting imagery and digital representations of energy patterns derived from non-contact sensor systems (ASPRS, 1988) Carleton University, GEOM 3002

  3. Remote Sensing • http://en.wikipedia.org/wiki/Remote_sensing • http://rst.gsfc.nasa.gov/Intro/Part2_1.html • http://ccrs.nrcan.gc.ca/resource/tutor/fundam/chapter1/01_e.php Carleton University, GEOM 3002

  4. The Remote Sensing Process 5 1 5 2 4 6 4 3 3 7 3 Carleton University, GEOM 3002

  5. Google Earth Carleton University, GEOM 3002

  6. http://veimages.gsfc.nasa.gov//1438/earth_lights.gif Carleton University, GEOM 3002

  7. Carleton University, GEOM 3002

  8. Carleton University, GEOM 3002

  9. GLEL Airborne CIR image: <10cm pixels Carleton University, GEOM 3002

  10. Can see and map different things at different scales Carleton University, GEOM 3002

  11. Can see and map different things at different scales Carleton University, GEOM 3002

  12. Can see and map different things at different scales Carleton University, GEOM 3002

  13. Universe to Earth: Scale • http://micro.magnet.fsu.edu/primer/java/scienceopticsu/powersof10/index.html Carleton University, GEOM 3002

  14. Remote Sensing Summary What this course is about: • Remote sensing uses images created by radiated energy (radiation) that has been reflected from a surface or emitted by the surface and that has travelled from the surface to a sensor. • Understanding the nature of the radiation, and how it interacts with the surface helps in understanding what an image is showing • Brightness in the image ~ the amount of radiation reflected or emitted. • Can analyze brightness visually (interpretation on-screen or of hardcopy), or quantitatively (with computer algorithms). • Brightness differences in images can be used to map land cover type; vegetation and water condition; soil moisture; crop yield, etc. Carleton University, GEOM 3002

  15. Some Advantages of Remote Sensing • Synoptic: can give an overview of a region as a whole. • Extensive and complete data coverage in a very short time; data are acquired for all points in an area • Differs from field measurement where only a few points can be sampled. • Can acquire data for regions that can’t be easily accessed • Can observe the environment using energy outside the visible part of the EM spectrum (invisible becomes visible). • Quantitative + qualitative information. • Imagery is linked to positions on the Earth. • Many sensor types, imaging methods, image processing, analysis and mapping algorithms. • Easy to conduct change analysis using imagery from different times or dates. Carleton University, GEOM 3002

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