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Science chapter 3
Terms in this set (80)
Dr Snow was able to map the disease filled areas
How did drawing a map help Dr John Snow save lives?
Its a simplified image of the earth's surface.
How is a map a model of the earth?
Its a spherical map.
What kind of map is a globe?
The detail is significant in a large scale map while it isnt very detailed with a small-scale.
How does the detail of a large-scale map compare to a small-scale map?
What real world distance does 1 inch equal on a map with a scale of 1:25,000?
Yes because you need something recognizable to find your location.
Do you need visible landmarks to find your position on a map?
The 2D surface is trying to model a smaller patch of a larger 3D model.
Why are maps often distorted?
A prime meridian, equator
The name of the reference or 0 degrees line: latitude, longitude.
0 to 90, 0 to 180
The range of pssible values, including directions: latitude, longitude.
Sea going clocks
The invention of what instrument allowed sailors to accurately determine longitude?
The location of any meridian can be adjusted to avoid dividing continents or island groups. t or f
What standard map feature explains symbols used for main highways, secondary roads, and unpaved roads?
You can't flatten a sphere without distorting features on it's surface.
Why are maps of the earth's surface distorted?
equatorial, polar, oblique
Name three kinds of projection surfaces commonly used for mapmaking.
What method do cartographers use to minimize distortion in the middle of a map, especially one showing a large part of the earth's surface?
The Robinson World map.
What kind of map was created specially for classroom textbooks?
What standard type of map would you choose if you were interested mainly in the shapes and boundaries of the countries of the world?
there would be a series of rings inside of eachother that might be close together depending on the slope.
Looking on a topographic map, how can you tell that the road on which you intend to bicycle runs up a steep hill?
They use them for most of their mapping needs.
Why do cartographers and scientists create thematic maps?
The type of projection used to make a map is based on a cartographer's preference, and not on the map's purpose. t or f
A simplified image that is a model of part of the earth's surface.
A special kind of map that shows the earth's surface as it appears from space.
Globes show the true shape of continents and oceans on the surface of a sphere. t or f
a nautical map
1 inch on a map shows 63,360 inches on the earth, since there are 63,630 inches in a mile.
1:10,000 or 1:40,000
For convenience, cartographers usually choose round numbers for a map scale.
Large scaled maps
Maps with larger scale ratios show smaller areas, and land features appear larger.
Maps with smaller scale ratio show larger areas and land features look smaller.
Ideally a system of crossing vertical and horizontal lines. Vertical lines run north-south. Horizontal lines run east-west.
0 degrees latitude
The equator is:
Lines of Latitude or parallels, because they appear parallel to the equator when the globe is viewed from the side
The circles on a globe are called
Longitude lines or meridians
If you rotate the sphere a little around its poles, you can draw another semicircle between the poles.
The 0 degrees longitude line passes through Greenwich, England. t or f
Together latitude and longitude are called
In ancient times who could only find their latitude accurately?
It displays a lot of information on a map.
When it touches or wraps around the equator.
If it touches a pole.
If it touches somewhere between the equator and a pole.
Imagine taking a sheet of paper and wrapping it around a globe. The sheet of paper forms a cylinder.
A maps projection surface is shaped like a cone.
In every kind of map projection, the projection surface is imagined to touch the earth at a point or line. t or f
Show elevations on the map above some standard height, such as sea level.
Geographic information system
Maintenance of objects, military uses
Two examples that show how GIS information can help people.
Point data type
Identifies a specific location like the position of a well on a map.
What feature of GIS maps sets them apart from standard maps?
What is the best way to quickly collect geographic data over large areas?
What is the main geographic data collection method for the ocean bottom?
GIS is very useful because it helps us find pollution infestation and forest fires.
Discuss the usefulness of GIS technology from a dominion science perspective.
GIS principles have been in use only since the development of computer mapping. t or f
A degree of an angle contains 360 angular seconds. t or f
GIS mapping is more effective for complex analysis than standard maps because layers of thematic data can be displayed as needed. t or f
Geographic information system applications can be used by specially trained persons. t or f
A map that shows the location of all the geysers in Yellowstone National Park is a thematic map. t or f
The steepness of a slope on a topographic map is indicated by the angle a contour makes with the horizontal. t or f
The terms gnomic, cylindrical, and conic refer to the shapes of the projection surfaces for each kind of projection. t or f
All map projections can show the true shape of countries and their true sizes. t or f
If the north arrow on a map points to the left, you would expect longitude lines to vertical and latitude lines to be horizontal. t or f
A position fix is a pair of geographic coordinates. t or f
Great circles on a globe do not have to pass through the north and south poles. t or f
North, south, east, and west are always the same no matter where you are on Earth. t or f
A map scale of 1:50,000 is larger than a scale of 1:300,000. t or f
Maps generally use an object view to show as much of the earths surface as possible. t or f
using planes and satellites
What is the most efficient way to collect GIS data over large areas?
Give an example of an earth feature that could be represented by each of the GIS data types.
acoustic sensing, surveying, remote sensing
Name the yhree main parts of a geographic information system (GIS).
they are used to hold important information
Why are thematic maps useful?
political, topographic, and geographic
What are three types of standard maps?
which type of mao would show glaciers and lakes?
What kind of projection would show the continent of Antarctica with the least amount of distortion?
can be easily flattened into a plane
What are the advantages of plane, cylindrical, and conic projection surfaces in cartography?
It must keep some of their relationship.
why is map projection needed?
map scale, longitude, latitude
List three features on a standard map that help you use it better.
Before modern navigation methods, such as GPS, how did sailors find their longitude?
vertical lines on a standard map
the horizontal lines on a standard map
They help show location.
How are map grid lines like landmarks?
Not visible in the real world.
How are map grid lines different from landmarks?
large scale shows smaller scale areas while small scale shows larger land mass
Discuss the difference between large-scale and small scale maps.
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