Latitude and Longitude with Google Earth - ATEP

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Student Worksheet (page 3 of 7) Latitude and Longitude with Google Earth For example, each of these coordinates describes the exact same location. Degree minutes seconds Degree decimal minutes Decimal degrees 61˚ 51’ 33.84”, -147˚ 50’ 58.2” 64˚ 51.564’, 147 50.97’ 64.8594˚, -147.8495˚ 61˚ 51’ 33.84” N, -147˚ 50’ 58.2” W 64˚ 51.564’ N, 147 50.97’ W 64.8594˚ N, -147.8495˚ W Although each of these is correct, decimal degrees is becoming more commonly used. This is because the coordinates can be used in spreadsheets. Google Earth can display each of these different formats at the bottom of the window. STEP 7. Open the preference file by selecting Google Earth g Preferences g 3D View (Tool g Options g 3D View on a PC) and click on Decimal Degrees if it is not already selected. The different formats can cause problems. For example, imagine you were working for your community Search and Rescue. A call comes in that a person was in trouble and needed help. The person had a GPS and by using a satellite phone they give the coordinates 58 52 52, -156 55 42 but they did not say what format was being used. The dispatch officer assumed it was in degrees, minutes and seconds, but what if it was in decimal degrees? Find the distance between 58° 52’ 52”, -156° 55’ 42” and 58.5252, -156.5542. Note that these coordinates use the same number sequence, but are in different formats. STEP 8. Enter 58 52 52, -156 55 42 in the search box of Google Earth. NOTE: Google Earth interprets the spaces as coordinates in degrees, minutes and seconds. The symbols do not need to be included. STEP 9. Enter 58.5252, -156.5542 in the search box of Google Earth. STEP 10. Click on both of the coordinates in the search box then use the ruler to measure the distance, in miles, between the two locations. Clear the measurement when finished. Answer question 10 on page 6 of this worksheet. Step 7 For a complete set of instruc tions on latitude and longitude syntax in Google Earth see the Google Earth Users Guide at: http://earth.google. com/userguide/v4/ug_editing.html Steps 8-10 ATEP ©2006-2010 UAF Geophysical Institute 15 GIT: Latitude and Longitude with Google Earth
Student Worksheet (page 4 of 7) Latitude and Longitude with Google Earth STEP 11. Type the name of your community in the Google Earth search box. Press Return to fly to it. STEP 12. Navigate in Google Earth to your school. STEP 13. Move the mouse pointer around and look at the bottom of the Google Earth window. Notice how the latitude and longitude change to show the current position of the mouse. Place the mouse pointer over your school. Answer question 11 on page 7 of this worksheet. STEP 14. In Google Earth navigate to the airstrip nearest your school. Answer questions 12 and 13 on page 7 of this worksheet. Distances between longitude and latitude Is the distance between one degree of longitude the same in Barrow, AK as it is in Adak, Alaska? What about the distance between one degree of longitude at the two locations? Are they the same? Use Google Earth to find the answer. STEP 15. Type: Adak, AK in the Google Earth search box, then press Return to fly to that location. STEP 16. Type the coordinates: 51.00, -176.5 in the Google Earth search box and press Return. STEP 17. Type the coordinates: 52.00, -176.5 in the Google Earth search box and press Return. STEP 18. Click both of the coordinates on so they are visible in the Google Earth window. STEP 19. Use the ruler to measure the distance, in miles, between 51.00, -176.5 and 52.00, -176.5 and write the distance of one degree of latitude in the table on page XX of this worksheet. STEP 20. Type the coordinates: 52.00, -176.00 in the Google Earth search box and press Return. STEP 21. Type the coordinates: 52.00, -177.00 in the Google Earth search box and press Return. Step 19 Step 13 Step 17-18 ATEP ©2006-2010 UAF Geophysical Institute 16 GIT: Latitude and Longitude with Google Earth
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Latitude and Longitude with Google Earth - ATEP

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