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ATEP ©2008 UAF Geophysical Institute 1 GIT: Visualizing Tsunami Runups with Google Earth
Overview:Students locate their community and create polygons in Google Earth to determine what areas would be affected at different runup levels.
Objectives:The student will:• put“Placemarks”ofemergencylocationsinGoogleEarth;• customizetheplacemarks;and• adddescriptionstoplacemarks
Materials:• STUDENTWORKSHEET:“VisualizingTsunamiRunupswithGoogleEarth”• ComputerwithInternetaccessandGoogleEarthinstalled(NOTE:GoogleEarthmaybeinstalled
for free at http://earth.google.com)
Activity Preparation:1. If it is not already installed, download and install the program Google Earth for each computer. It is
availableathttp://earth.google.com.Downloadtheappropriateversionfortheoperatingsystemonwhichtheprogramwillbeinstalled.DoubleclickontheGoogleEarthicontolaunchtheprogram.
2. Students should be familiar with using Google Earth. They should be able to zoom in/out, move and tilt the image. If students are not familiar with Google Earth, have students do the Grades 5 - 8 “GoogleEarth”lessonbeforedoingthislesson.Itcanbedownloadedathttp://www.aktsunami.com/lessons/GITExercises.html.
3. KMZfilesofcommunitiesinsouthernAlaskaareavailableontheATEPwebsite.Thefilesshouldbeadded to Google Earth before completing the lesson. Google Earth updates its imagery regularly, so checktoseewhethertheATEPwebsiteorGoogleEarthhasthemostcurrentimagery.TodownloadtheKMZfiles,clicktheStudent ResourcesbuttonontheATEPwebsiteathttp://www.aktsunami.com, then go to Satellite ImagerytodownloadtheKMZfileforyourcommunity.ThefilewillopeninGoogle Earth.
4. The units used for elevation in this lesson are meters. To change the elevation to meters in Google Earth go to Tools ➔ Options and select the 3D View tab. Select the Meters, Kilometers button in the Show Elevation section.
Activity Procedure:1) Askstudentshowfarwaterwouldgointothecommunityifatsunamiwitha2-meterrunupwereto
strike.Askhowfaritwouldreachifthetsunamihada6-meteror10-meterrunup.
2) Introduce the lesson by explaining that polygons will be created in Google Earth to demonstrate the areacoveredforatsunamiwitha2-,6-and10-meterrunup.Ifavailable,useaprojectortodemon-stratetheprocedureusingtheSandPoint,Alaska,exampleasdescribedintheSTUDENTWORK-SHEET.
Visualizing Tsunami Runups with Google Earth Grades 9-12
ATEP ©2008 UAF Geophysical Institute 2 GIT: Visualizing Tsunami Runups with Google Earth
3) HandouttheSTUDENTWORKSHEET:“VisualizingTsunamiRunupswithGoogleEarth.”Havestu-dents launch Google Earth and complete the activity for their community.
(NOTE:Theresolutionof theelevationdataused inGoogleEarthvariesacross theglobe. In theLower48,itrangesfrom3metersto30meters.InAlaskatheresolutionis60meters.Theelevationaccuracyofthepolygonscreatedinthisexerciselikelywillvaryfromtheelevationreadingsgivenona GPS. Google Earth updates its data regularly, so future updates may provide more accurate eleva-tions as data becomes available.)
ExtensionIdea(s):Students create a document with the information of the emergency locations and telephone numbers tobetakenhomeandsharedwiththeirfamily.
Answers:1) Answers will vary.2) Answers will vary.3) Answers will vary.4) Answers will vary.5) Answers will vary.
Name:____________________________________
ATEP ©2008 UAF Geophysical Institute 3 GIT: Visualizing Tsunami Runups with Google Earth
STEP 1:
Launch Google Earth and type the name of your community in the search box.Clickonthemagnifyglassorpress return.
StudentWorksheet(page1of3)Visualizing Tsunami Runups with Google Earth
STEP 2:
Use the zoom in/out tool so a large area around the community is visible in the window.
STEP 3:
On the menu use the Add ➔ Polygon,orclicktheAdd Polygon icon from the toolbar.
STEP 4:
In the Nameboxtype“2MRunup.”
Grades 9-12
STEP 5:
1)ClickontheStyle, Color tab.
2)DoubleclickontheArea color box.
3)SelectayellowcolorandclickOK.
4) Lower the Opacity to 50%.
Add Polygon
Name:____________________________________
ATEP ©2008 UAF Geophysical Institute 4 GIT: Visualizing Tsunami Runups with Google Earth
StudentWorksheet(page2of3)Visualizing Tsunami Runups with Google Earth
STEP6:IntheGoogleEarthwindow,startthepolygonby clickingapointthatisintheoceanandawayfromthe community.Continueclickingpointstomakeapolygon that completely covers the community.
STEP7:ClickontheAltitudetabinthe“2MRunup”polygonwindow.Enter “2m” in theAltitudeboxand select Absolute from the drop down menu. ClickOKwhenfinished.
STEP8:Repeatsteps3through7tomaketwomorepolygonlayersthatarethesamesizeasthefirstone.Makeagreenpolygonatthe6mlevelthathas a 50% opacity and another at the 10m level that is red with a 50% opacity.
STEP9:InthePlacessidebarclickonthe2M Runup layer while the othertwo(6M&10M)areoff.Zoomin,tilt,andmovearoundthe image to see what areas of the community would be cov-ered with a 2m runup.
Grades 9-12
Name:____________________________________
ATEP ©2008 UAF Geophysical Institute 5 GIT: Visualizing Tsunami Runups with Google Earth
StudentWorksheet(page3of3)Visualizing Tsunami Runups with Google Earth
STEP10:Clickthe2Mpolygonoffandclickonthe6Mtoseethedifference intheareasthatwouldbecovered.Dothesameforthe10Mrunup.
Analyze the areas covered at the different levels by comparing them to the coast or a building.
Example: View the areas inundated by comparing them to the building in the circle.
2mrunup 6mrunup 10mrunup
Answer the following questions.
A. Wouldtheairportrunwaybecoveredatthe2m,6mor10mrunuplevel?
_______ M runup level
B. Wouldanyschoolsbeinundatedbya2m,6m,or10mrunup?(Circleone)
2m runup: yes no 6mrunup: yesno 10m runup: yes no
C. Whatistheelevationoftheschool?(Hint:withthemousecursorovertheschool,lookatthebottomof the Google Earth window.)
_________
D. Arethereanyhousesthatwouldbereachedbyatsunamiwitha2mrunup?(Circleone)
yes no
E. Whatareasareprimarilyaffectedbya2mrunup?(i.e.,harbor,cannery,parkinglots,houses)
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Grades 9-12