CONS 127 Lecture 18: CONS 127 - Big Geo-Data March 29 2018
21 Sep 2018
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Aerial photography - first images came around 1910-1920. Definition: big data is data that must meet all four vs (volume, variety, veracity, These are the basic building blocks we start off with. Information: when we process and organize this data, it becomes information. Knowledge: when information is processed by people, it becomes knowledge. Interesting fact: an estimate of 2. 5 quintillion (10 to the power of 18) is how much data we are producing per day! How can we use this particular big data and compare it with other data to find uncertainties (if any) If a data set meets these 4 criteria, it can qualify as big data . Yes, there are different types of remote sensing! Passive sensor (cameras, imagers, spectrometers: volume: 2. 5 million images have been downloaded from landsat: velocity: Remote sensing has data streaming from everywhere all the time! Remote sensing gets images from anywhere on the earth and new images are coming in each day.
