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Quiz1 GEO250

Fall 2011 Words/Concepts

QuestionAnswer
Geography the science that studies the lands, features, inhabitants, and phenomena of Earth. A study of where things are and why
Remote Sensing The science, technology, and art of obtaining information about objects from a distance
Remote Sensors Satellites, cameras, radar
In-Situ On site and in contact
GIS Geographic Information Systems. Automated overlay/combination of types of data. Displays data such as remotely sensed data and analysis of this data, maps, surveys eg census data. answers questions like where to build a college
GPS Global Positioning System two parts: Satellites orbiting earth and handheld receivers. 24 satellites in 6 orbital planes 4 satellites in each plane. GPS is based on a constellation of satellites that emit timed signals.
False Color Image A false-color image is an image that depicts a subject in colors that differ from those a full-color photograph would show.
Concept of different wavelengths within the electromagnetic spectrum We only see a limited amount of the electromagnetic spectrum. we don't see gamma, x-ray, uv, reflected infrared, thermal infrared, microwave or radio wavelengths
Color Infrared (near infrared) for vegetation health and identification. Photography captures the green, red, and near infrared energy which is displayed in a false color form. reflected energy at wavelengths a little longer than what we can see
Thermal Infrared thin ice and warm water pollution detection, wildfires
Benefits of remote sensing; use of different wavelengths, visualization from a distance, analysis over time, different observations emerge over large areas Information from wavelengths other than visible. We see a very narrow range of wavelengths. Access to otherwise inaccessible areas e.g. antarctic, volcanoes, war zones, deep sea, disaster areas. View at a different scale.
Early remote sensing hill-tops, mast heads, balloons, kites, and pigeons
Photo interpretation as a skill developed particularly during WWII Air photos were used to confirm or deny reports from spies in europe.
Baedeker Raids they targeted relatively unimportant but picturesque cities in England. The cities were reputedly selected from the German Baedeker Tourist Guide to Britain, meeting the criterion of having been awarded three stars for historical significance
Photogrammetry - making accurate measurements of distances and heights from maps for topographic maps forest inventory, and geological mapping, agricultural statistics who's growing what
Radar Sensor emits microwaves and then receives microwaves that are returned to the sensor. how we can see through fog.
Pixels it is the smallest unit of picture that can be represented or controlled. Each pixel has its own address. The address of a pixel corresponds to its coordinates.
High Resolution Digital Camera high detail camera that records onto hard drive
low resolution less image detail/fewer pixels
Amazon Mechanical Turk Software program where you query what seems to be a computer and a human responds with an answer.
Satellite Components Bus, Source of power (solar panel), receive and transmit data, on board computer, data gathering instruments, thrusters to move satellite, battery, covered in protective material, internal temperature control, Gyroscope (small scale adjustments)
Micron 1 millionth of a meter, it is represented by the symbol µm
Created by: 521040346
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