Introduction to Google Earth Name____________________ Goals

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Introduction to Google Earth Name____________________ Goals Powered By Docstoc
					Introduction to Google Earth                                           Name____________________

Goals
1. To become proficient at using the basic features of Google Earth.
2. To recognize differences in coastal features between the east and west coast of North America.

These direction refer to version 5.1

Part 1 (DO NOT DO THIS IF YOU ARE USING AN MPC COMPUTER; GO TO PART 2):
- If your computer has Google Earth installed already, skip to Part 2
Download Google Earth: Going to this URL will allow you to download the latest version of Google Earth.
http://earth.google.com/
- click on Download and follow the steps from there

Part 2
- Open Google Earth and wait for it to load.

1. Tool Bar on Left of screen
- At the upper left is the “Search” box. In this box there is a
tab called “Fly to” which acts as a search bar that will take
you wherever you wish to go to in the world.

-Enter “980 Fremont St, Monterey, CA” into the text box
and press Enter.

Where are you? Please answer with a phrase other than
“980 Fremont St, Monterey, CA”.


        Monterey Peninsula College

-Now the screen should look like the one to the right.

What happens when you uncheck the little box?

  The location name disappears from the satellite
        screen
What happens when you press the “X”?

 The location name disappears from the search screen


-The box at the lower right is called “Layers”.

-Be sure you always have “Terrain” checked.
The others aren’t so important
2. Enter “Point Lobos State Reserve” into the Fly To box and press Enter.

3. Located on the right hand side of the screen is a control panel that is hidden until you scroll your
mouse over it (see image below).

If the control panel does not show up, go to View>Show Navigation and click “Automatically”.

Play with all the controls to learn what they do.

Use the controls to change the viewpoint to one that is inclined and looks towards the south at the
specific places that we went on our Pt Lobos field trip. Your eye altitude (number shown at the far lower
right) should be between
800 m and 1.2 km. Show
your instructor and have                 AGH
him/her sign off here.




                                                                  The location of the “N” indicates the
                                                                  direction of view. In this case, the view is
                                                                  towards the south.
4. Note the dark translucent strip cross the bottom of the screen. It shows information about what you
are viewing in Google Earth
 Starting from the left it shows the date that the digital image was taken of that area.
 Moving towards the center it shows the latitude, longitude, and elevation (respectively) of the
    location where your mouse is located.
 On the far right is the eye altitude, i.e., the distance above sealevel of an eye seeing the view.

-Move the mouse around. Which of the following numbers change as you move your mouse around
(You may want to circle more than one)?
a. date of digital image b. latitude   c. longitude d. elevation   e. elevation of viewpoint

5. Manipulate the screen so that you can see down the Big Sur coastline a few kilometers.

Let’s play with a few of the options in Google Earth.
Press Tools>Options….
In the box that opens, make sure that the 3D View tab is pressed.
In the Show Lat/Long area, experiment with switching between “Decimal Degrees” and
         “Degrees, Decimal Minutes,” pressing “Apply” each time.
         What changes? Which one is the same as the Monterey Bay Chart we worked on?
                                                                                  The units for the location on
                                                                                  the bottom of the screen
                                                                                  changes. We used Degrees,
                                                                                  Decimal Minutes
                                                                               Leave this one in
                                                                               Decimal Degrees.

                                                                               Experiment with the
                                                                               Elevation Exaggeration,
                                                                               changing it from 0.5 to
                                                                               1.5 to 3, clicking Apply
                                                                               each time (if you don’t
                                                                               see any difference,
                                                                               make sure that Terrain
                                                                               is checked in the Layers
                                                                               box—see the bottom of
                                                                               p. 1).

                                                                               Leave the Elevation
                                                                               Exaggeration at 1.5.
In the Show Elevation area, make sure that Meters, Kilometers is clicked.

Now open the Options box again (Tools>Options…) and press the Navigation tab.
In the Navigation area, turn off the “Automatically tilt while zooming” button.
Turn on the “Gradually slow the Earth when rotating or zooming” button.

Set the settings shown on this page each time we use Google Earth.
6. Note the toolbar across the top of the screen:



Scroll your mouse across them to read about what each of them do. Note the ruler.

Where is your hometown? _______________________________

Manipulate the screen so that you can both MPC and either your house or your hometown.
If out of the area, use the ruler to measure the distance from your hometown to MPC._______________
Be sure to use metric units (don’t use smoots ).
If in the area, use the ruler to measure the distance from your house to MPC____________________

Note that when the Ruler box opens up, there is a Heading listed. This is the same as a bearing.

How far is it from the tip of Fisherman’s Wharf to the MPC football field?____2.05 km______________

What is the Heading from the tip of Fisherman’s Wharf to the MPC football field?___161 degrees_____


What is the elevation of the MPC football field (metric units)?_____31 meters___________________

7. Fly to 36.421959N, 121.915078W. This is Garrapata Beach.
Manipulate the screen so that the view is highly inclined, the eye altitude is about 2 km, and the view is
towards the south-southeast so that you can see Garrapata Beach and Highway 1 extending southwards
along the coast.

Note the terrain that generally lies between highway 1 and the top of the seacliff. What are these
landforms called?
                ____Marine Terraces______________________________
How did these landforms form?

  Uplift of wave-cut platforms by tectonic forces


Now zoom out so that your eye altitude is about 10km. You’re looking at the Santa Lucia mountains.
Based on your answer to the previous question, why do you think there are such big mountains so close
to the shore?

 Rapid uplift of the land relative to sea level due to tectonic forces
8. Fly to Wilmington, NC. Wilmington is located on the banks of the Cape Fear River. This is the location
of Cape Fear Community College.

Scroll southwards so that you follow the river to where it empties into the Atlantic Ocean. You’ve found
Cape Fear, which Wikipedia tells me was originally named Cape Fair.

Use control panel to manipulate the view to investigate the coastal region both north and south of Cape
Fear. Zoom in and out so that the eye elevation is similar to what you used to investigate the Big Sur
Coast, i.e., between 2 and 10 km.

What are the coastal characteristics of the Cape Fear region (you are encouraged to look up the term
“barrier island” to help answer this question)?

  Long, straight beaches, barrier islands, lagoons behind the barrier islands, low, flat-lying terrain inland
from the shoreline.




How do these coastal characteristics differ from those of the central California coast?

 In Central California there are mountains and marine terraces close to shore. The beaches are
characterized by rocky sea cliffs and pocket beaches separated by rocky headlands.

 There are also bigger waves in central California.




How do the tectonics differ between this east coast region and the central California coast?

Central California is characterized by active tectonics related to the San Andreas Fault. The east coast is
characterized by passive tectonics and a more tectonically stable environment.




How do you think this tectonic difference influences or controls the differences in coastal characteristics
you described above?

 The active tectonics of the central California coast cases the uplift that creates the sea cliffs and rocky
headlands of the central California coast. The more passive tectonics of the
9. Let’s travel about 270 km up the North Carolina coast to Cape Hatteras, location of one of the most
famous lighthouses in the United States. Fly to 35.252568N, 75.525000W. For the remainder of this
section, do not scroll the view at all. We’ll zoom in and out, but don’t move the view anywhere.

Zoom out to about 350 km or so, so you can see where you are. Cape Hatteras is on one of the best
examples of a barrier island that you’re likely to find anywhere.

Zoom back in to about 1 km. Press the “X” in the lower right of the Search box to get rid of the lat and
long in the middle of the screen.

Where is the lighthouse (look for its shadow)?
a. in the middle b. northeast area c. northwest area d. southwest area e. southeast area




In the toolbars across the top, turn on the historical imagery.




Put the curser on the Mar 1, 1993 imagery, as shown above left.
Where was the lighthouse in 1993 (look for its shadow)?
a. in the middle b. northeast area c. northwest area d. southwest area e. southeast area

Use the ruler to measure the distance from the lighthouse to the landward edge of the beach.
What is the distance in meters?                 41 meters
                                __________________________________

Why do you think the lighthouse was moved?
See http://www.nps.gov/caha/historyculture/movingthelighthouse.htm and read the first two
paragraphs and the last paragraph, and look at the pictures. Why was the lighthouse moved?

It was in danger of being washed away by wave erosion.



Now put the curser on the Feb 19, 2004 imagery, as shown above, right.

What changes occurred near the groin in the decade between 1993 and 2004? Draw a picture to help
you explain.

  Drastic erosion took place south of the groin. In this area the sand must be moving from north to south
along the beach. The groin trapped some of the sand north of the groin, leaving the area south of the
Groin to be greatly eroded.
10. Now let’s go back to the Monterey area on the west coast.

Follow the instructor’s directions to download the file called “MontereySandAll.kml” and open it with
Google Earth by pressing the file>open buttons.

This is all the sand data collected by MPC Oceanography students.

a. Without moving the view from the opening scene, what patterns do you see involving sand
composition? In other words, what generalizations can you make about the locations of sands of
different compositions, if any?

The sand is darker along the Marina to Sand City section and lighter along the Monterey Peninsula
section.



b. Again without moving the view from the opening scene, what patterns do you see involving the grain
size of the sand? In other words, what generalizations can you make about the locations of the sands of
different grain size, if any?

Grain size is large along the Marina to Sand City section and variable on the Monterey Peninsula.




c. Now move around in Google Earth to look at some of the beaches where students collected sand. You
can click on the icons to see who collected it and what they thought the composition was.

In particular, look at the length of the beaches on the
Monterey Peninsula to see how they relate to grain size.
What is the relationship between beach length and grain
size on the Monterey Peninsula?
                                                                                            Monterey
                                                                        Marina—
                                                                                            Peninsula
The larger grain sizes are found at smaller pocket                      Sand City
beaches. The smaller grain sizes are found at longer
beaches like Asilomar and Carmel.
d. What additional differences do you see between the Monterey Peninsula and the Marina—Sand City
area. Focus your efforts in terms of the Emergent/Submergent and Erosional/Deositional coastlines we
talked about in class.

Summarize your analysis here:
Monterey Peninsula                                   Marina – Sand City
Evidence of Emergent coastlines:                     Evidence of Emergent coastlines:

Scalloped coast line, marine terraces                Not much




Evidence of Submergent coastlines:                   Evidence of Submergent coastlines:

                                                     Flooded river valleys at Elkhorn Slough, Seaside,
Not much                                             and Aguijito Lagoon.

                                                     The long, gently curving beaches and the sand
                                                     dunes resemble east coast beaches, which the
                                                     textbook describes in the section on submergent
                                                     coasts.

Evidence of Erosional coastlines:                    Evidence of Erosional coastlines:

Scalloped coastline, sea stacks, seacliffs are all   Seacliff in the dunes. Also, the coastal armoring is
classic evidence of erosional coastlines.            great evidence.



Evidence of Depositional coastlines:                 Evidence of Depositional coastlines:

Not much                                             The long, gently curving beaches and the sand
                                                     dunes resemble east coast beaches, which the
                                                     textbook describes in the section on submergent
                                                     coasts.

				
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