Module 1.lab 2

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Module1.2_Lab-3.docx

Module 1.2 Lab

Measuring in Google Earth

This lab builds on the two Neighborhood at 10 and 17 maps you created during Lab 1.1. You will be finding the area of polygons, as well as calculating the path distance and travel time between placemarks using Google Earth (GE).

1. Open the .kmz file(s) from Lab 1.1. If your two neighborhoods were in different locations, you would have had to make two different files.

2. For clarity, this lab’s example map is a single .kmz file where the first polygon is within the second.

Figure 1 Neighborhoods 1 (Orange) and 2 (Green) with 2 Placemarks locations each

3. The area has already been calculated for you and is part of the feature’s properties. Find the area under places -> ‘your polygon’ -> properties -> measurements.

Figure 2 GE Places pane, feature properties window, and measurement tab

4. Example map’s Neighborhood 1 has an area of .10 square miles while Neighborhood 2 is 1.26 square miles.

5. Make note of the areas for each of your neighborhood polygons.

6. To begin calculating distance and travel times, select two placemark points within Neighborhood 1. Zoom in so that you are focused on the two points.

7. Open the ruler tool. See the green arrow and ruler icon in Figure 3.

Figure 3 Ruler tool in ribbon and ruler tool window

8. Using the Line tab, will create a straight-line path between your two points. You can get the distance from there. In the figure, you can see the yellow line on the left that passes through houses, yards and over fences. This direct path is .11 miles or 588 feet. Save and name the line feature. Make sure you drag the feature in Places from Temporary places to your kmz project. Then save the kmz group as a kmz over itself.

9. Use the ruler tool and the Path tab to create a path that follows how you would normally have traveled from between the points. The path option allows you to create a path using multiple points. The compare the yellow and sky blue paths in the figure. The more common travel distance is .16 miles or 854 feet. That is 45% longer than the straight-line path.

10. You can change edit features in the properties window.

11. Create the same line paths for two placemark features in from the Neighborhood at 17. Note the varying distances. Save those line paths to your kmz and save the kmz.

12. Now you are going to move the project, your kmz file to Google Maps in a web browser. You may be familiar with using Google Maps for directions, you will be using this functionality to create a travel path between points and provide drive and walk travel times.

13. You can open Google Maps (GM) from within Google Earth (GE) as shown in the figure. Or you can open Google Maps (GM) in a web browser.

Figure 4 GE opens Google Maps

Figure 5 GM Menu and Your Places

14. Use the Menu to select Your Places

15. Select the Maps Option and Create Map at the bottom of the pane.

Figure 6 Import for new map

16. Select import. Drag and drop your kmz file into the import pane.

17. Add directions to the map.

Figure 7 GM add directions

18. AS you type the placemark names GM should autofill the locations. Use the transportation link to select driving or walking. Use the 3 dots to select Step-by-Step directions.

Figure 8 GM add endpoints and get time

19. The Step-by-Step will give you distance and time for your path. The path will also appear as a new feature in your map. It might even be a different path than you laid out. This is especially true for the walking path.

Figure 9 Travel distance and time

20. To close out, create a word document for Lab 1.2. Paste in images of your map(s) with paths included.

21. Put the results into an APA style table.

Table 1

Google Earth Neighborhoods: Areas and Path Distances

Features

Area (sq miles)

Miles

Feet

Drive Time (min)

Walk Time (min)

Neighborhood at 10

0.1

Straight-line Path 1

0.11

583

Travel Path 1

0.16

843

1

2

Neighborhood at 17

1.46

Straight-line Path 2

0.45

2362

Travel Path 2

 

0.72

3780

3

14

22. Consider the following factors for a write up of 1-3 paragraphs:

· Difference in area between the two neighborhoods

· Reasons for selecting the specific paths that you did. Were they paths you walked, biked, bused or drove?

· Any differences between the paths your created and those from GM’s directions

· Difference in path and travel times between driving and walking