Marble/C2/Globe---A-true-model-of-Earth/English-timed
From Script | Spoken-Tutorial
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| 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. |
