3. B. Maps are a universal medium for communication , easily understood and appreciated by most people, regardless of language or culture. Incorporated in a map is the understanding that it is a "snapshot" of an idea, a single picture , a selection of concepts from a constantly changing database of geographic information.
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7. 3. 3 rd century Rome- developed the earliest road maps
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9. 5. 15 th Century- printing made maps more readily available
18. Review Questions 1. What has improved the accuracy of maps over time? Aerial Photography GPS GIS
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25. a. Meridians - (lines of longitude) vertical lines running North and South , measure of distance east and west of the Prime Meridian i. Prime Meridian- runs through Greenwich England, labeled 0 degrees longitude ii. International Date Line- located along the 180 degree meridian
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27. b. Parallels - (lines of latitude) horizontal lines running east and west , measure of distance north and south of the equator ( 0 degrees latitude) 2. Public Land Survey System- uses a grid system of square miles to subdivide land
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31. Review Questions 1. What are the six essential components of a map? Title Scale Date Source Legend Location
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33. 2. What would a fractional scale of 1:24,000 suggest about the size of the area being mapped? That it is very large.
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41. 2. What are possible sources of error in data that would cause a map to be inaccurate? Accuracy, precision, bias, estimations
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44. B. Physical Relief Map- similar to a topographic map but in 3-D
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46. C. Road Map- a map that would have all the states and major roads
52. 1. Shows relief (variations in elevation ) by using contour lines (a line that passes through all points on a map with the same elevation) 2. Use symbols to represent features
59. 3. Used to identify potential geologic hazards (earthquakes, landslides etc.) by identifying rock types, and fault lines allowing scientists to predict future events and threats. 4. Fundamental resource for environmental and engineering applications
66. 2. How can geological maps be important economically for our society? They show where oil and natural gas could be along with certain types of rocks that hold certain types of minerals. Ex. Gold, Diamonds
![The History of Maps ,[object Object]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)