Marble/C2/Globe---A-true-model-of-Earth/English-timed

From Script | Spoken-Tutorial
Jump to: navigation, search
Time
Narration
00:01 Welcome to the spoken tutorial on Globe A true model of the Earth.
00:07 In this tutorial we will learn about,
00:11 Behaim globe and historical map
00:15 Continents and oceans
00:18 Significance of latitudes and longitudes
00:22 How to change the colour of latitudes and longitudes
00:27 Grid and coordinates
00:30 To record this tutorial, I am using;

Ubuntu Linux OS version 16.04

00:38 Marble version 1.12.20
00:43 The process demonstrated in this tutorial is identical in

Ubuntu Linux OS version 18.04

00:52 Marble version 2.2.20
00:56 To practise this tutorial, learner should be familiar with Marble interface.
01:02 For the prerequisite Marble tutorials, please visit this site.
01:08 On the Marble interface, the topographical map of Earth is the Virtual globe.
01:15 Let us learn about what is a globe.
01:18 The word globe comes from the Latin word globus, meaning sphere.
01:24 The earliest terrestrial globe was made by Martin Behaim in 1492.
01:31 Let us go to Map View and select Behaim Globe 1492.
01:39 This is the oldest model of Earth in the form of a sphere.
01:45 To see more features of this globe, let us select Legend panel.
01:50 Scroll down the Legend panel to see Places (in German).
01:56 Select Behaim Places checkbox.
02:00 This shows the places depicted by Behaim in 1492.
02:06 Select Texts and Illustrations checkbox.
02:10 In this globe, inscriptions are shown in German.
02:14 In this globe, there is no clear demarcation between continents and coastlines.
02:20 This globe was made by Behaim and his collaborators to discover the West.
02:26 For that reason America is not shown on this globe.
02:32 An assignment for you.
02:35 Explore the expanded versions of Behaim globe.

Hint: Use the legend panel.

02:43 Let us go to Map View and select Historical Map 1689.
02:50 In this globe we can see,

The continents, Latitudes and Longitudes

03:00 Let us go back to our default view.
03:04 We can see that land area is represented by light green and yellow colors.
03:11 Water is represented by blue colour.
03:15 Click on the dropdown button, next to Globe View.

And select Flat View option.

03:23 Now we can see all the continents and oceans in the same plane.
03:29 Observe that the land of earth is divided into seven continents.
03:34 Asia, Europe, Africa, North America, South America, Australia and Antarctica.
03:46 Global Ocean is the interconnected system of water bodies.
03:51 For convenience water bodies have been grouped into oceans like

Pacific Ocean

03:59 Indian Ocean
04:01 Southern Ocean and Atlantic Ocean
04:07 Now we open the Place information data sheet of Indian ocean.
04:13 I will scroll down to show the information.
04:18 Click on the Close button to close this sheet.
04:22 Let us go back to the default view.
04:25 Let us go to MapView and select Political Map.
04:30 We will hide the panels for better view of the globe.
04:35 Go to the Settings menu and select Panels.
04:41 In the sub-menu, select Hide All Panels.
04:45 Political map shows boundaries of countries and location of major cities.
04:53 We will go to Asia and see the main countries of Asia.
04:59 Let us zoom in to see the countries Russia, China, India,
05:09 Mongolia, and others.
05:16 Similarly we can find the other countries from each continent.
05:22 Let us go back to the default view.
05:25 Go to Settings menu and select Panels.
05:30 Select Show All Panels.
05:35 Then click on Atlas View.
05:38 Notice a red dot on the top of the globe. It is the North pole.
05:46 Let us rotate the globe downward to see the another red dot.
05:51 It is the South pole.
05:54 Rotate the globe to its default view.
05:58 The yellow horizontal line running around the globe is the Equator.
06:03 It divides the earth into two equal parts.
06:08 Here we see some lines parallel to the Equator.
06:13 Since these lines are parallel to theEquator, they are called parallels of latitudes.
06:20 Notice that some lines are connected from the North Pole to the South Pole.
06:26 These lines are Meridians of longitudes.
06:32 Prime Meridian is the main Meridian of longitude.
06:36 It is an imaginary line that divides the earth vertically into two equal halves.
06:43 More information about latitudes and longitudes is available in the Additional material link.
06:52 Let us now change the color of latitudes and longitudes for better visibility.
06:58 Go to the Settings menu and select Configure Marble Virtual Globe option.
07:05 Configure window opens.
07:08 From the left panel, select Plugins option.

Plugins menu opens.

07:15 In the menu, click on the Configure button corresponding to Coordinate Grid check-box.
07:22 Coordinate Grid Plugin dialog box opens.
07:26 Here we can change the colors of Grid, Tropics and Equator.

Click on the Grid button.

07:36 Color dialog box appears on the screen.
07:40 In the box, I will select dark brown color.
07:45 Click on the OK button in the color box.
07:49 Next click on the Tropics button.
07:53 Colour box appears again on the screen.
07:57 I will select red color and click OK button.
08:03 Similarly I will change the colour of Equator to black.
08:08 Click on the OK button in the Coordinate Grid plug in dialog box.
08:13 Click on the OK button in the Configure window.
08:17 Observe the change in the colors of Grid, Tropics and Equator.
08:24 For convenience, most of the globes show only a few longitudes and latitudes.
08:31 But the actual globe has a parallel system of longitudes and latitudes.
08:38 Go to Settings menu and select Configure Marble Virtual Globe option.
08:45 Configure window opens.
08:48 Select View option from the left panel.
08:52 In the menu, under Units, click on Angle drop down.
08:58 Select Universal Transverse Mercator.
09:02 Click on Apply button then click on OK button.
09:09 Observe that longitudes and latitudes form a crisscross network across the globe.
09:17 It is called as Geographic Grid.
09:21 The intersection point of a latitude and a longitude is its coordinate.
09:27 Let us go back to the default view.
09:30 Go to Settings menu and select Configure Marble Virtual Globe option.
09:37 Configure window opens.
09:40 In the View menu, under Units, click on Angle drop down and select Degree DMS.
09:49 Click on Apply button.
09:52 Click on the OK button to close the dialog box.
09:56 Let us go back to our home location, Mumbai.
10:00 We will find the coordinates of Mumbai on the globe.
10:06 Place the cursor on Mumbai.
10:08 Longitude and latitude are shown on the status bar.
10:14 Let us summarize.
10:16 In this tutorial we have learnt about,
10:20 Behaim globe and historical map
10:23 Continents and oceans
10:26 Significance of latitudes and longitudes
10:31 How to change the colour of latitudes and longitudes
10:35 Grid and coordinates
10:38 An assignment for you,

Find the continents through which the Equator passes and

10:45 Find the Indian states through which the Tropic of Cancer passes.
10:51 The video at the following link summarizes the Spoken Tutorial project.

Please download and watch it.

10:59 The Spoken Tutorial Project team conducts workshops and gives certificates.

For more details, please write to us.

11:09 Please post your timed queries in this forum.
11:13 Spoken Tutorial Project is funded by MHRD,Government of India.
11:19 This is Viji Nair from IIT Bombay signing off.

Thank you for watching.

Contributors and Content Editors

PoojaMoolya