t14 - Geography 231 Introduction to Geospatial Methods...

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1 Geography 231 Introduction to Geospatial Methods Topic 14: Introduction to Remote Sensing II: EMR Basics and Energy-Matter Interactions Goals To look at electromagnetic radiation: the To look at electromagnetic radiation: the engine that drives remote sensing To understand the basic energy-matter interactions
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2 “the science and art of obtaining Remote Sensing: Definition information about an object, area, or phenomenon through the analysis of data acquired by a device that is not in contact with the object, area, or phenomenon under investigation.” Remote vs. In Situ Sensing
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3 Remote Sensing Platforms Increased perspective External noise/interference Generally unobtrusive Broad electromagnetic sensitivity Systematic, unbiased observation Digital extensions Often relies on surrogate measures Technical/calibration issues Can be obtrusive
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4 Man must rise above the Earth to the top of the atmosphere and beyond, for only then will he fully understand the world in which he lives – Socrates
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5 New York City: September 12 th 2001. As no air travel, the image is the first overhead image of the disaster. IKONOS Multispectral satellite image. (Space Imaging Corp).
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6 The Physics of “Light” Electromagnetic Radiation (EMR) is the engine that drives remote sensing Electric and magnetic fields fluctuating orthogonally,
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t14 - Geography 231 Introduction to Geospatial Methods...

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