Difference between revisions of "QGIS/C2/Downloading-GIS-Datasets/English"
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'''Spatial Data''' | '''Spatial Data''' | ||
− | || '''Spatial Data''' is of two types '''Vector Data '''and''' Raster Data'''. | + | || '''Spatial Data''' is of two types, '''Vector Data '''and''' Raster Data'''. |
Latest revision as of 11:58, 13 July 2018
Visual Cue | Narration |
Slide Number 1
Title Slide |
Welcome to this tutorial on Downloading GIS Datasets. |
Slide Number 2
Learning Objectives |
In this tutorial, we will learn
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Slide Number 3
System Requirement |
To record this tutorial, I am using
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Slide Number 4
Pre-requisites https://www.nationalgeographic.org/encyclopedia/geographic-information-system-gis/ |
To follow this tutorial, knowledge about GIS is desired, but not essential.
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Slide Number 5
Datasets |
All the datasets required for this tutorial are available in Code files link. |
Slide Number 6
About GIS |
About GIS
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Slide Number 7
Spatial Data |
Spatial Data is of two types, Vector Data and Raster Data.
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Open Firefox/Chrome web browser. | Open any web browser.
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Click on Downloads link
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Natural Earth data website opens.
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Scroll down |
Downloads page opens.
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Point towards the scales.
Point towards the details. |
You can see three different scales of dataset.
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Under Large scale data >> Click on Cultural button
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Let us download a dataset for demonstration.
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Scroll down the webpage. | A webpage opens.
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Click on Download countries tab. | Let us download the country administration boundary files.
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Point to the dialog box.
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A dialog-box opens, which prompts you to save the file.
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Open Downloads folder and point the zip file. | The process of download begins.
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Right-click to extract the contents. | Extract the contents of the zip file.
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Double-click to open the folder
Point to all the files. |
Double-click on the extracted folder.
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Slide Number 8
Spatial Data-Vector Data |
About Vector data.
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Cursor on slide. | Let us open QGISand view one of the downloaded files. |
Double-click on QGIS icon.
Cursor on the interface. |
Here, I have already opened QGIS interface. |
Click on layer on the menu bar.
Click on add layer. Click on add vector layer. |
Click on, Layer menu on the menu bar.
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Point to Add Vector Layer dialog-box .
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Add Vector Layer dialog-box opens.
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Click on Browse.
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Under Source heading, click on Browse button.
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From the folder, select the file ne_10m_populated_countries.shp
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From the contents of the folder, select the file with .shp extension.
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Click Open in Add vector layer dialog-box.
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In the Add vector layer dialog-box, click on Open button.
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Click on Project in the menu bar.
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Save the map.
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In the File name text box, type Map-1.
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In the dialog-box, name the file as Map hyphen 1.
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Slide Number 9
Spatial Data - Raster Data |
About Raster Data.
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Cursor on slide | Let us download raster dataset from Bhuvan website. |
Slide Number 10
Bhuvan Website Link |
Bhuvan Platform was created by ISRO.
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Show the Address bar. | Open the Bhuvan website link in any web browser.
Open Data Archive page opens. |
Point to Select Category>> Satellite/Sensor radio button. | On the left panel under Select Category, select Satellite/Sensor option. |
Select Resourcesat-1: LISS-3.
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Under Select Subcategory drop down, choose Resourcesat-1: LISS-III option.
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Cursor on Select Area panel, Bounding Box tab . | Let us download data for Mumbai region.
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Type Minimum longitude 72.75 E Type Maximum longitude 73 E Type Minimum latitude 19 N Type Maximum latitude 19.25 N Click select |
For Mumbai region, enter the following data.
Maximum Longitude 73 Minimum Latitude 19 Maximum Latitude 19.25
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Point to the highlighted tile. | A tile over Mumbai will be highlighted. |
Click Next button.
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Click on Next button at the bottom of the page.
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Point on Date of Pass column.
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Select the most recent imagery by looking into the Date of Pass column.
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Click on the check box.
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Click on the check box on this row under Selection for backlog.
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Click on OK. | Bhuvan will prompt you to login.
Click on OK button. |
A dialog-box opens. | |
Click on New User. | If it is your first time in using Bhuvan, click on New User link to create a new account. |
Point to Account and Profile Information page.
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Account and Profile Information page opens.
Click on Submit button.
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Enter username
Enter password Click Login |
I have already completed the registration process.
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Click Download from the list of available Tiles against 24Dec15 | Again, in the tiles panel for 24Dec15 row, click on the Download button. |
Point to download dialog-box. | Download of the zip file begins.
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Select Save File radio button >> click OK.
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Select Save File option and click on OK button.
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Right-click on the folder and select Extract Here option.
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Extract the contents of the zip file.
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On the QGIS window,
Click on New icon on the tool bar. |
Let us now open a file in QGIS.
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Click on Layer>> Add Layer>>Add Raster Layer | Click on Layer on the menu bar.
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Open GDL Supported Raster Data Source dialog-box opens.
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A dialog-box opens.
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Navigate to the folder l3e43a1624dec15
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Select the file 24December15 hyphen BAND2 dot tif
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Point to the image on QGIS window. | On QGIS canvas, you will see the raster map of Mumbai region. |
Slide Number 11
Summary |
Let's summarize.
In this tutorial we have learnt,
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Slide Number 12
Assignment 1 |
For the assignment-
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Slide Number 13
Assignment 2 |
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Slide Number 14
About Spoken Tutorial project |
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Slide number 15
Spoken Tutorial workshops |
The Spoken Tutorial Project team conducts workshops and gives certificates.
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Slide Number 16:
Forum for specific questions: Do you have questions in THIS Spoken Tutorial? Please visit this site Choose the minute and second where you have the question Explain your question briefly Someone from our team will answer them. |
Do you have questions in THIS Spoken Tutorial?
Please visit this site. Choose the minute and second where you have the question. Explain your question briefly. Someone from our team will answer them. |
Slide Number 17:
Acknowledgement |
Spoken Tutorial Project is funded by NMEICT, MHRD, Government of India.
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This tutorial is contributed by Prajwal M. from Sahyadri College of Engineering and Snehalatha from IIT Bombay.
Thank you for joining. |