QGIS/C2/Downloading-GIS-Datasets/English-timed
From Script | Spoken-Tutorial
| Time | Narration |
| 00:01 | Welcome to this tutorial on Downloading GIS Datasets. |
| 00:06 | In this tutorial, we will learn |
| 00:09 | About GIS |
| 00:11 | Download vector dataset from Natural Earth Data website. |
| 00:16 | View vector data in QGIS. |
| 00:20 | Download raster dataset from Bhuvan website, and |
| 00:25 | View raster data in QGIS. |
| 00:29 | To record this tutorial, I am using |
| 00:33 | Ubuntu Linux OS version 16.04 |
| 00:38 | QGIS version 2.18 |
| 00:42 | Mozilla Firefox browser version 54.0 and |
| 00:47 | A working Internet connection |
| 00:50 | To follow this tutorial, knowledge about GIS is desired, but not essential. |
| 00:58 | For more information about GIS, please visit the given link. |
| 01:03 | All the datasets required for this tutorial are available in Code files link. |
| 01:10 | About GIS
GIS stands for Geographic Information System. |
| 01:17 | It is a system for capturing, storing, querying, analyzing and displaying geospatial data. |
| 01:26 | Spatial Data is of two types, Vector Data and Raster Data. |
| 01:33 | Let us download vector dataset from Internet. |
| 01:37 | Open any web browser. |
| 01:40 | In the address bar, type www.naturalearthdata.com
Press Enter. |
| 01:49 | Natural Earth data website opens. |
| 01:53 | Click on Downloads link. |
| 01:56 | Downloads page opens.
Scroll down the page. |
| 02:02 | You can see three different scales of dataset.
Large, Medium and Small. |
| 02:12 | Let us download a dataset for demonstration. |
| 02:16 | Under Large scale data, click on Cultural button. |
| 02:21 | A webpage opens.
Scroll down the page. |
| 02:27 | Here, we can see various available datasets. |
| 02:32 | Let us download the country administration boundary files. |
| 02:37 | Under heading Admin zero hyphen Countries, click on Download countries button. |
| 02:45 | A dialog-box opens, which prompts you to save the file.
Select Save file option. |
| 02:53 | Click on OK button. |
| 02:56 | The process of download begins. |
| 02:59 | On my system, zip file downloads to the Downloads folder. |
| 03:05 | Extract the contents of the zip file.
Right-click and select Extract Here option. |
| 03:14 | Double-click on the extracted folder. |
| 03:18 | Here we see many files with different file extensions. |
| 03:23 | This is a vector type of dataset. |
| 03:26 | About Vector data. |
| 03:29 | Discrete features such as wells, roads and land-use types is Vector Data. |
| 03:36 | Vector data can be of point, line or polygon format. |
| 03:41 | Let us open QGISand view one of the downloaded files. |
| 03:47 | Here, I have already opened QGIS interface. |
| 03:52 | Click on, Layer menu on the menu bar. |
| 03:56 | From the menu options, select Add Layer. |
| 04:00 | From the sub-menu, click on Add Vector Layer option. |
| 04:05 | Add Vector Layer dialog-box opens. |
| 04:09 | Select File as Source type, Systemas Encoding. |
| 04:16 | Under Source heading, click on Browse button. |
| 04:20 | Navigate to the admin countries folder downloaded from the Natural Earth data website. |
| 04:27 | From the contents of the folder, select the file with .shp extension.
Click on Open button. |
| 04:37 | In the Add vector layer dialog-box, click on Open button.
A world map opens on the canvas. |
| 04:46 | Save the map. |
| 04:48 | Click on Project in the menu bar. |
| 04:52 | Scroll down, click on Save button. |
| 04:57 | In the dialog-box, name the file as Map hyphen 1. |
| 05:03 | I will save it on the Desktop. |
| 05:06 | Click on Save button. |
| 05:09 | The map will be saved as Map hyphen 1 dot qgs on the Desktop. |
| 05:16 | About Raster Data. |
| 05:19 | Continuous features that exist spatially between observations is Raster Data. |
| 05:26 | Raster data is made up of cells in row and column format. |
| 05:32 | Let us download raster dataset from Bhuvan website. |
| 05:37 | Bhuvan Platform was created by ISRO. |
| 05:41 | The website hosts various data collected by Indian remote sensing satellites. |
| 05:48 | Here is the link to download raster dataset from Bhuvan website. |
| 05:54 | Open the Bhuvan website link in any web browser. |
| 05:59 | Open Data Archive page opens. |
| 06:03 | On the left panel under Select Category, select Satellite/Sensor option. |
| 06:10 | Under Select Subcategory drop down, choose Resourcesat-1: LISS-III option. |
| 06:18 | Scroll down, under Select Area, choose Bounding Box . |
| 06:25 | Here, we have to enter the latitude and longitude of the location. |
| 06:31 | Let us download data for Mumbai region. |
| 06:35 | Use google maps to find the latitude and longitude of a particular region. |
| 06:41 | For Mumbai region, enter the following data. |
| 06:45 | Minimum Longitude 72.75 |
| 06:50 | Maximum Longitude 73 |
| 06:54 | Minimum Latitude 19 |
| 06:58 | Maximum Latitude 19.25 |
| 07:02 | Click on Select button. |
| 07:05 | A tile over Mumbai will be highlighted. |
| 07:09 | Click on Next button at the bottom of the page.
A list of available Tiles opens. |
| 07:17 | Select the most recent imagery by looking into the Date of Pass column. |
| 07:23 | 24 December 15 is the most recent out of the available datasets. |
| 07:30 | Click on the check box on this row under Selection for backlog.
Click on Download button on this row. |
| 07:39 | Bhuvan will prompt you to login.
Click on OK button. |
| 07:45 | A dialog-box opens. |
| 07:48 | If it is your first time in using Bhuvan, click on New User link at the bottom of the page to create a new account. |
| 07:57 | Account and Profile Information page opens. |
| 08:02 | Fill the appropriate details as shown.
Click on Submit button. |
| 08:09 | You will receive an email from the Bhuvan team with Login Id and Password. |
| 08:15 | I have already completed the registration process.
So I will click on Click here to login link. |
| 08:24 | I will enter Username and Password and click on Login button. |
| 08:31 | Again, in the tiles panel for 24Dec15 row, click on the Download button. |
| 08:38 | Download of the zip file begins. |
| 08:43 | A dialog-box opens, which prompts you to save the file. |
| 08:48 | Select Save File option and click on OK button. |
| 08:53 | The zip file will be saved to the Downloads folder. |
| 08:57 | Extract the contents of the zip file. |
| 09:01 | Double click on the extacted folder. |
| 09:05 | This folder has raster dataset for Mumbai region. |
| 09:10 | Let us now open a file in QGIS.
Open a new window. |
| 09:17 | Click on New icon at the top-left corner on the tool bar. |
| 09:22 | Click on Layer on the menu bar. |
| 09:25 | From the menu options, select Add Layer. |
| 09:29 | From the sub-menu, click on Add Raster Layer option. |
| 09:34 | A dialog-box opens. |
| 09:37 | Navigate to the folder we had downloaded from Bhuvan website. |
| 09:42 | Select the file 24December15 hyphen BAND2 dot tif
Click on Open button. |
| 09:51 | On QGIS canvas, you will see the raster map of Mumbai region. |
| 09:58 | Let's summarize. |
| 10:00 | In this tutorial we have learnt,
About GIS |
| 10:05 | Downloaded vector data from Natural Earth Data website |
| 10:10 | Viewed the vector dataset in QGIS. |
| 10:14 | Downloaded raster data from Bhuvan website |
| 10:18 | Viewed the raster dataset in QGIS. |
| 10:22 | For the assignment-
From Natural Earth Data website, download Medium Scale, Physical data for Rivers and Lakes |
| 10:32 | Another popular website to download GIS data is Openstreetmap data website. |
| 10:39 | Explore Openstreetmap data website |
| 10:43 | The video at the following link summarizes the Spoken Tutorial project.
Please download and watch it. |
| 10:51 | The Spoken Tutorial Project team conducts workshops and gives certificates.
For more details, please write to us. |
| 11:01 | Do you have questions in THIS Spoken Tutorial?
Please visit this site. |
| 11:08 | Choose the minute and second where you have the question.
Explain your question briefly. |
| 11:16 | Someone from our team will answer them. |
| 11:20 | Spoken Tutorial Project is funded by NMEICT, MHRD, Government of India.
More information on this mission is available at this link. |
| 11:32 | This tutorial is contributed by Prajwal M. from Sahyadri College of Engineering and Snehalatha from IIT Bombay.
Thank you for joining. |
