1. Latitude and Longitude

2. Latitude & Longitude
What is the blue line on this globe called?
Equator!

3. Latitude & Longitude
What is the yellow line on this globe called?
Prime Meridian

4. Latitude & Longitude continued

5. Latitude (x axis) & Longitude (y axis)
- Coordinate system used to locate places on Earth
ALWAYS stated first
(x) Latitude: measured in degrees, North & South of Equator
- think “laddertude” (rungs of a ladder)
** lines of latitude are also called parallels
horizontal lines
Maximum latitudes: 900 N (north pole) & 900 S (south pole)
Reference line = Equator (00)
Always has # and direction (examples: 490 N; 320 S)

6. Latitude (x axis) continued
There are 2 ways to get latitude: 1) with reference to center of Earth
2) with reference to Polaris
Polaris & latitude: altitude / angle to Polaris = your latitude
If on the same latitude: 1) all see Polaris at same angle
2) all have same length of day
NH = Northern Hemisphere SH = Southern Hemisphere
FYI: 10 of latitude ~ 111 km

7. Longitude (y axis)
ALWAYS stated second
ALWAYS stated second
(y) Longitude: measured in degrees, East & West of the Prime Meridian (Greenwich, England)
** lines of longitude are also called meridians
Reference line: Prime Meridian (00) / GMT
Greenwich Mean Time
** A chronometer is a very accurate clock used to find longitude by finding the time difference from 00 longitude.
GMT is the time in Greenwich, England from which all longitude is calculated E or W of the Prime Meridian based on 15o per hour of difference from GMT.

8. Longitude (y axis) continued
International Date Line (IDL): 1800
If you go West over the IDL, add a day
If you go East over the IDL, lose a day
If on the same longitude: 1) same time
2) all will see high noon at the same time
Rotational rate = Distance = 3600 = / hour
Time hrs
Memorize this
1 rotation per 24 hours

9. Longitude (y axis) continued
Rotational rate = Distance = 3600 = / hour
Time hrs
Memorize this
Earth is broken into 24 equal time zones, all 150 apart with 1 hour difference
Earlier
Later

10. Stop!

11. Latitude / Longitude Intro
BOTH sides: start with latitude
and then…

12. Latitude / Longitude
Worksheet 03-2L

15. 60 minutes! 60 seconds! Dividing degrees How many minutes in an hour?
Guess what a degree is divided into (in latitude / longitude)?
60 minutes!
How many seconds in a minute?
Guess what a minute is divided into (in latitude / longitude)?
60 seconds!

16. NYS Latitude / Longitude Page 3 ESRTs – RULER TIME
See next page in your notes for reference
See next page in your notes for reference
See next page in your notes for reference

17. Latitude / Longitude ctd
Page 11 of your notes packet: Add the minutes and seconds you see below

18. Southwestern United States
Latitude & Longitude –
Southwestern United States

19. Latitude / Longitude ctd
Use page 3 of the ESRTs to complete the following table on PAGE 11 in your notes packet
Location
Latitude
Longitude
430 5’ N
760 10’ W
420 45’ N
730 40’ W
440 10’ N
730 55’ W
420 5’ N
750 55’ W
790 15’ W
Riverhead
Slide Mountain
Oswego
Watertown
Buffalo
Syracuse
Albany
Mt. Marcy
Binghamton
Jamestown
400 50’ N
720 35’ W
420 N
740 20’ W
430 25’ N
760 25’ W
430 55’ N
750 55’ W
420 50’ N
780 50’ W

20. Homework: Lat / Long Practice (18 – 30)

21. Latitude / Longitude Lab

22. Phone a friend at 6 am?
Remember: Rotational rate = 150 / hour

23. Longitude / Time Zone Problems

24. Latitude / Longitude Lab – Reality Check
Greenwich Mean Time (GMT)
Greenwich Mean Time: the time in Greenwich, England from which all Longitude is calculated east & west of the Prime Meridian using 15o / hour of difference from GMT.

25. Latitude / Longitude Lab – Reality Check
2o driving in North Dakota vs. Texas
2o = 2o but meridians (lines of longitude) are farther apart the closer to the Equator you are. Since Texas is closer to the Equator than South Dakota is so you would physically travel farther in Texas driving 2o east. *** LOOK AT THE GLOBES **

26. Latitude / Longitude Lab – Reality Check
DESCRIBE how to use latitude and longitude
You would measure latitude north or south of the Equator in degrees (latitude is ALWAYS listed first)
then you would measure longitude east or west of the Prime Meridian in degrees
Latitude and longitude give the coordinates to pinpoint any location on Earth.

27. Maps including Lat. / Long.