SpaceEarthSci 1C

What is cartography?

- the science of map making- process of taking spherical Earth and putting it on a flat surface

What is a reference point of longitude?

The Prime Meridian

what is the international date line?

180° This is the imaginary line of longitude that divides one day from the next in the time zones. As you go from west to east, you add 1 hour for each time zone.

If it's 3 pm on Thursday July 4 in Salt Lake City, Utah, what time and day is it in Tokyo, Japan?

10:43 am, Thursday august 18th

The time difference between your home and places that are 60 degrees east and west longitude of your home.

6 hours east, 4 hours west.

If you were flying directly south from the north pole and reached 70 degrees north latitude, how many more degrees of latitude would be left to pass over before you reach the south poles?

You would pass 70 degrees to reach the equator, which occurs at 0 degrees, and another 90 degrees to reach the south pole. Which is 160 degrees.

The distance of a degree of longitude varies from the equator to the poles.

A degree of longitude is widest at the equator with a distance of 69.172 miles (111.321 kilometers). The distance gradually shrinks to zero as they meet at the poles. At 40 degrees north or south, the distance between a degree of longitude is 53 miles (85 kilometers).

what are Mercator and Gnomonic projections commonly used for?

Mercator projection maps are used in navigation due to their ability to label any point on the globe. The Gnomonic projection projects points from a globe onto a piece of paper that touches the globe at a single point. It creates circle routes often used in air travel

How is a conic projection made?

by projecting points and lines from a globe onto a cone

What is a contour line?

a line that connects points of equal elevation on a map

How are areas of depression represented on a topographic map?

Contour lines that show a depression, crater, or sinkhole on a map are represented by dashed lines (hachure marks) on the inside of a contour line.

what is the reference point of latitude?

equator