Latitude, Longitude, and Scale

Latitude and Longitude

• Where do these Numbers Come From??

Latitude and Longitude cont.

• Latitude and Longitude are basically a giant coordinate system.

• Map of Michigan

• Practice Questions

Degrees, Minutes, and Seconds

• Degree – degrees are marked on a map/globe by the solid lines

• The distance between all lines of longitude is approximately 69 miles

• The distance between lines of latitude are approximately 69 miles at the equator and 0 miles at the poles

Degrees, Minutes, and Seconds cont.

• Minutes – 1 minute = 1/60 of a degree• Seconds – 1 second = 1/60 of a minute• Like in time: 60 seconds in a minute; 60

minutes in an hour (degree)

• The units are subdivided like scale on a graph– Could go by 100’s, 10’s, 1’s, etc.

• Could be divided further into tenths, hundredths, and thousandths (like in decimals)

Scale

• Scale is the relationship between distances on a map and distances on the earth’s surface

• Represented as a fraction (1/20) or a ratio (1:20)

• What does this mean?

Scale and the Real World

• Other than mapmakers, what professions use scale?

• Scale is constant for a given piece- Ex: a map has the same scale for the entire map or a blueprint has the same scale for the whole blueprint

Scale and the Real World cont.

• Hot Wheels Clip

• Advertising Clip

• What kind of math did the people in these videos use?

• What did they have in common?

Large Scale vs. Small Scale

• Large Scale – small area is covered with a large amount of detail– Ex: 1:10– Detailed map of the ATA

• Small Scale – large area is covered with a small amount of detail– Ex: 1: 1,000,000– A Globe