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REMOTE SENSING. Remote Sensing vs. Ground Truthing Remote sensingRemote sensing = Taking data about an area from far away. Ground truthingGround truthing.

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Presentation on theme: "REMOTE SENSING. Remote Sensing vs. Ground Truthing Remote sensingRemote sensing = Taking data about an area from far away. Ground truthingGround truthing."— Presentation transcript:

1 REMOTE SENSING

2 Remote Sensing vs. Ground Truthing Remote sensingRemote sensing = Taking data about an area from far away. Ground truthingGround truthing = Taking data about an area while at the area. WHY ARE BOTH NECESSARY?

3 HOW DO SATELLITES WORK 1.FIRST DATA FROM THE SATELLITE IS SENT TO A COMPUTER IN THE FORM OF ONES AND ZEROES. 2.THEN THOSE NUMBERS ARE TURNED INTO A TRUE IMAGE OF THE AREA – TRUE COLOR IMAGE OR SENSORS MAY BE USED TO SHOW DIFFERENT THINGS – FALSE COLOR IMAGE

4 12 C B A 3 HOW DO SATELLITES WORK

5 ?

6 AERIAL PHOTO

7 SATELLITE TRUE COLOR IMAGEFALSE COLOR IMAGE

8 EMITTED VS REFLECTED EMITTED RADIATION – everything gives off radiation even when its dark REFLECTED RADIATION – things reflect light in different ways

9 EMITTED COMPUTER camera

10 REFLECTED COMPUTER camera

11 Byrd Glacier, Antarctica Acquisition Date: Jan 11, 2000 Path/Row: 44/118 Lat/Long: / Byrd Glacier is a 15 mile wide, 100 mile long, rock-floored ice stream located in southern Antarctica. This long, unique ice feature plunges through a deep valley in the Transatlantic Mountains and into the Ross Ice Shelf. This ice stream speeds as a river of ice at a rate of one half mile per year. LANDSAT

12 Lake Chad, Africa taken by LANDSAT 1972, 1987, 2002

13 REFLECTANCE CURVES


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