# Geog 210 Exam 2

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1. Prime Meridian
If you were at 0 degrees longitude you would be standing on the prime meridian
2. Equator
If you were at 0 degrees latitude you would be standing on the equator
3. The term used to describe a projection which ctrols for angle and shape is:
Conformal
4. The equation for computing the length of a line or the distance between two points is:
line length= sqrt((x1-x2)^2+(y1-y2)^2)
5. Using a computer to draw lines, points or polygons into a georeferenced dataset is
digitizing
6. What is the term we, geotechnology people, use to describe phenomena that occur over both space and time
Spatio-temporal
7. Data about other data of any sort in any media is
8. Describe four of the main types of geotechnology described in class
• Remote Sensing-creating data without actually making contact with the area of interest
• Computer Cartography- Making maps on a computer
• GPS- uses a series of satelites orbiting in space to locate the GPS device
• GIS- Geographic information system- System that has the ability to create layers of people, buildings, geography geology etc. on a map to analyze
9. Nine major components of a map
• Title
• Legend
• Scale
• North Arrow
• Discription
• BOarder
• Credits
• Source
10. Five potential things a map projection may distort
• Area
• Angle
• Space
• Direction
• Distance
11. What is a Geoid and how is it different from a spheroid?
A geoid is very similar to a spheroid, but not a true spheroid because it has irregularities. Earth is a Geoid because it has mountain peaks and low Oceanic valleys
12. What is the difference between a coordinate system and a projection?
A projection distorts areas on earth since it's on a flat surface and a coordinate system on a map can be used to tell us where we are
13. In geography what may the word scale be used to describe
The distance in units on a map compared to the actual units on earth. Also, it can be used to describe time and resolution

### Card Set Information

 Author: kamrunsreno ID: 189138 Filename: Geog 210 Exam 2 Updated: 2012-12-12 22:40:55 Tags: Arc GIS Folders: Description: final exam study material Show Answers:

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