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GEOG170 Exam 1
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27
General Vocab
03/09/2010

Term
 Oldest known map and where from
Definition
 Mesopotamia 2500BCE
Term
 Geodesy
Definition
 the scientific discipline that deals with the measurement and representation of the earth
Term
 How is the shape of the earth best described
Definition
 Oblate ellipsoid
Term
 Latitude and Longitude, which are which are parallel and which intersect?
Definition
 Longitude intersects while latitude are parallel
Term
 The prime meridian is 0d along what and goes through what
Definition
 It is 0degrees longitude and goes through Greenwick England
Term
 What are latitude and longitude measured in?
Definition
 Degrees, Minutes, Seconds. Latitude goes from 0 to 90 while Longitude goes from 0 to 180 E - W
Term
 What are the different types of map projections and what is a Mercader map used for?
Definition
 Conformal - Angular measurements, Equal-area - Regions in correct relative size, Equadistant - Maintains distance along great circles from one or two pts, Azimulthan - direction from one central pt. Mercator is used for keeping angles
Term
 If one wanted to study wildlife of a certain area and put the criter population on a map which type would they use?
Definition
 Equal-Area
Term
 Which basic geo surface is used to create a map
Definition
 sphere
Term
 Where would you typically find a reference grid? i.e. abc 1234
Definition
 On a driving map or any Conformality map. (not sure if right)
Term
 Define Scale and which is best for making a map of the globe
Definition
 Scale is a ratio of two numbers. It has no units because it is a ratio and if the ratio is 1:10 then 1inch would - 10inches. a large scale (1:50k+) would be best for the globe
Term
 What are topograhpic maps and why do we make them
Definition
 It is a map that shows elevations of a certain area. We use them so we can navigate hilly/mountainous area and plot what path to take
Term
 in accordance with electromagnetic spectrum, what does wavelength mean?
Definition
 It is the distance between the peaks or valleys of a wave.
Term
 What interval of e- radiation are in the visible spectrum
Definition
 .4-.7
Term
 What portions of e- spectrum are typically used for remote sensing
Definition
 UV+
Term
 When e- radiation hits a surface it usually does 3 things
Definition
 Absorbs, Reflects, Refracts
Term
 Which platform has never been used for remote sensing
Definition
 hot Air Baloon
Term
 What is the difference between active and passive sensing
Definition
 Active is when something is transmitted from the sensor while passive uses the natural wavelengths from the sun
Term
 What is planimetric shift?
Definition
 It's when an object appears above or below the base image
Term
 orthophoto
Definition
 corrected photo so that it is a map and you can actually measure distances on it
Term
 What are the typical reflectance curves for soil, vegetation, and water
Definition
 Water reflects very little in the visible are but then drops off completely in the NIR zone and IR. Vegetation reflects mainly in the green part of the visual spectrum while reflects about 50% of the NIR and IR. Soil has an odd curve reflecting a moderate amount over all of it
Term
 What is atmospheric correction?
Definition
 It's the corrections we make to a reading to account for the particles in the atmosphere that distort the signals that are being read from our instraments
Term
 What are descriptive Stats?
Definition
 Statistics that describe a certain set of inputs
Term
 Why do we make false colors and what are they?
Definition
 We change the colors of a certain set of wavelengths to show a particular feature on a map. i.e. making vegetation pink to distinguish it from everything around it
Term
 Know the different classifications (supervised and unsupervised)
Definition
 Supervised is when a reading is there to edit it in a meaningful way such as making all the old forrest a different color from the new forrest. unsupervised does this by coloring the different wavelengths different colors but is seldom useful
Term
 What do we use time series for?
Definition
 To make maps that show things like deforestation.
Term
 [image]
Definition
 Energy Source or Illumination (A) Radiation and the Atmosphere (B) Interaction with the Target (C) Recording of Energy by the Sensor (D) Transmission, Reception, and Processing (E) Interpretation and Analysis (F) Application (G)
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