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Thrusting outward into space, we gain new perspective on ourselves.

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How beautiful it is our cloud-wreathed spaceship, Planet Earth

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How beautiful, and how small.

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The Western Test Range in California, July 23rd, 1972.

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[engines fire]

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Perhaps no new devleopment in space is more significant than this

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ERTS – short for Earth Resources Technology Satellite

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[music]

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At Goddard Space Flight Center at Greenbelt, Maryland,

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the operations control center monitors the spacecraft's flight night and day.

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Watching every element of its operation and issuing orders

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that control its performance.

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The color additive viewer is all but indispensible for many investigators.

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Among them, NASA's senior geologist, Dr. Nicholas Short.

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The color additive viewer is an instrument that uses color filters

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to enhance certain features of an image we're particularly interested in.

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For instance, here's a black and white picture of the Monterey Bay area in California

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produced by the infrared channel on the ERTS Multi-Spectral Scanner.

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Now if we project this image through a green filter,

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the green tones, which are vegetation, such as the farm areas in the Great Valley

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will show up more green. By combining different spectral images

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and trying different filters, we can get a wide variety of effects and choose the one that's best suited to our needs.

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We here at Dartmouth are concerned about a pressing social and economic problem:

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urban sprawl, and conversely with a disappearing resource, open land.

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Our general area of interest is the highly urbanized section of the Eastern Seaboard

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which extends from Boston southward to Washington,

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and to which has been given the name Megalopolis.

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Our specific area of interest is the New England section of it.

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Increasingly the spreading problems of megalopolis

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require a broader base treatment to that of individual metropolitan areas.

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This is an ERTS photograph of southeastern New England, Long Island Sound,

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the Atlantic Ocean, the face of Cape Cod, and Boston.

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By enlarging this area, which corresponds to the state of Rhode Island,

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we can make a land use map of that area.

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ERTS, a new chapter in space, is in fact a new chapter