What kind of maps do sailors use?
Charts
Where do cartographers get the points for their map projections?
A 3D sphere
What does GIS stand for?
Geographic Information System
What type of map is this?
Thematic
Why don't we use maps with an oblique view anymore?
They distort the distance between images
What is the starting point of latitude?
Equator
Who makes maps?
Cartographer
What type of map is this?
Topographic
A degree is about how many nautical miles
60 nautical miles
Daily Double!
What do we use to map the ocean floor?
Acoustic sensing
What areas of the world are conic projections most used for?
The middle of the earth
What type of map is this?
Geographic
At least how many satellites does a gps receiver need to get an accurate location?
Three
How do topographic maps show elevation?
Contour lines
What are the three ways that we can collect data for GIS?
Remote Sensing
Acoustic Sensing
What type of map is this?
Political
What are the four standard map features?
Some kind of scale information
Map legend
A title, copyright, etc.
North is at the top of the map
What are the three evidences that tells us that the earth is a sphere?
Ships far out on sea slowly disappear below the horizon.
Some stars can only be seen from certain parts of the earth at the same time.
During a lunar eclipse, earth's shadow on the moon is always round
Where do gnomonic projections start from and what areas are they used to map?
Starts from the earth's center
Used for maps of the polar regions
This is John Snow's cholera map. What type of map is this?
Thematic