QGIS/C2/Digitizing-Map-Data/English-timed

Time	Narration
00:01	Welcome to this tutorial on Digitizing Map Data in QGIS.
00:07	In this tutorial, we will learn to- Create and digitize Point and Polygon shape files.
00:15	Change style and color for Point and Polygon features.
00:20	To record this tutorial I am using- Ubuntu Linux OS version 16.04 QGIS version 2.18
00:32	To follow this tutorial, you should be familiar with basic GIS and QGIS interface.
00:41	Digitizing is the process by which, coordinates from a map, image or other sources of data are converted into a digital format.
00:52	The converted data can be stored as a point, line or a polygon feature in GIS.
01:00	To practise this tutorial, you need to download the thematic map of Bangalore city given in the Code files link.
01:09	This is a map depicting development of Bangalore city.
01:15	Steps to download the code files.
01:18	Click on the link Code files, located below the player and save it in your folder.
01:25	Extract the downloaded zip file.
01:28	Locate Bangalore.jpg file in the extracted folder.
01:34	I have already downloaded the Code file, extracted and saved in a folder on Desktop.
01:41	Double-click on the folder to open it.
01:45	Right-click on Bangalore.jpg file.
01:49	From the context menu select, Open with QGIS Desktop.
01:56	QGIS interface opens.
01:59	QGIS Tips dialog-box opens. Click on OK button.
02:06	Coordinate Reference System Selector dialog-box opens.
02:11	Under the heading, Coordinate reference systems of the world, Select WGS 84.
02:19	Note that WGS 84 is the most widely used geographic coordinate system.
02:27	Click on OK button at the bottom of the dialog-box.
02:32	Thematic map of Bangalore is displayed on the canvas.
02:38	Now let us create new shape file layers.
02:42	Click on Layer menu on the menu bar and select Create Layer option.
02:50	From the sub-menu, select New Shapefile Layer option.
02:55	New Shapefile Layer window opens.
02:59	Here you can see options for 3 types of features, Point, Line and Polygon.
03:10	By default Point option is selected. Leave it as such.
03:16	Let the CRS be WGS 84.
03:21	Click on OK button at the bottom-right corner of the window.
03:27	Save Layer as.. dialog-box opens.
03:31	Let us name the file as Point-1.
03:35	Select a suitable location to save the file. I will choose Desktop.
03:42	Click on Save button at the bottom-right corner of the dialog-box.
03:48	Files will be saved on the desktop as shown here.
03:53	Back to the QGIS interface.
03:56	Notice that the file will be automatically loaded in the Layers Panel.
04:02	On this map, we will mark the locations where IT departments are established.
04;09	Scroll the center mouse button to zoom-in.
04:14	Refer to the legend at the bottom-right corner of the map for IT establishments.
04:21	IT establishments are indicated as flag symbol.
04:26	Locate the points indicating IT establishments on the map.
04:32	There are two points indicating IT establishments.
04:37	To edit or modify features on the map, we need to select the Toggle editing tool.
04:44	Toggle Editing tool is available on the top-left corner of the tool bar.
04:51	Click on the Toggle Editing tool to select it.
04:55	Click on Add Feature tool on the tool bar.
04:59	The cursor is now displayed as a crosshair icon.
05:04	Click on IT establishment symbol on the map.
05:08	An input-box Point-1 Feature Attributes opens.
05:14	Type 1 in the id text box. Click on OK button.
05:21	Similarly click on the second IT establishment and save the feature as 2. Click on OK button.
05:31	Now to stop editing, again click on Toggle Editing tool on the tool bar.
05:38	Stop editing dialog-box opens.
05:42	Click on Save button.
05:45	Observe, on the map, two colored point features are created.
05:51	We can check the two features created, by opening the attribute table.
05:56	Right-click on the Point-1 layer on the Layers panel.
06:01	From the context menu, select Open Attribute Table option.
06:06	In the Point-1: Features dialog-box, in id column, two points are created.
06:13	Close the attribute table dialog-box.
06:17	Style and color of these point features can be changed for clear visibility.
06:23	Right-click on the Point-1 layer.
06:26	From the context menu choose Properties option.
06:31	Layer Properties dialog-box opens.
06:35	Click on the Color drop down.
06:38	Choose a color by rotating the color triangle.
06:42	Increase the size by clicking on upward arrow triangle at the end of Size text box.
06:50	Click on OK button at the bottom of the dialog-box.
06:54	Notice the change in color and size for the Point features.
07:00	Now let us create a shape file containing Polygon features.
07:05	Click on Layer menu on the menu bar. Select Create Layer option.
07:12	From the sub-menu, select New Shapefile Layer.
07:17	New Shape File Layer window opens.
07:21	Select Type as Polygon.
07:25	In the New field Name text box, type area.
07:31	Let the Type be Text data.
07:35	Click on Add to fields list button
07:40	In the Fields List table, you will see area row added. Click on OK button.
07:50	Save layer as.. dialog-box opens.
07:54	Type the File name as Area-1.
07:58	Select a suitable location.
08:01	I will select Desktop. Click on Save button.
08:07	Notice that Area-1 layer is added to the Layers panel.
08:13	We will mark the boundary of Corporation Area and Greater Bangalore area.
08:20	Refer to the Legend on the map to locate Corporation area and Greater Bangalore area.
08:28	Turn on the toggle editing by clicking on Toggle Editing tool on the tool bar.
08:35	Click on Add Feature tool from the tool bar.
08:39	Bring the cursor to the map.
08:42	To mark the area, click anywhere on the boundary of Corporation area.
08:48	Keep clicking on the boundary.
08:51	Warning messages may appear at the top of the canvas if the line segments intersect. Please ignore these messages.
09:02	If you make a mistake and want to restart the marking process, press Esc Key on the keyboard.
09:10	You can start the process again.
09:13	Keep clicking on the boundary till you span the entire boundary.
09:24	Once you have marked the entire boundary, right-click to end the polygon.
09:30	Area-1- Feature Attributes input box opens.
09:36	Type 1 in the id text box.
09:40	Type Corporation Area in area text box.
09:45	Click on OK button.
09:48	Observe, on the map new polygon feature is created.
09:54	Now we will digitize Greater Bangalore region in the map.
09:59	Click on the boundary to digitize Greater Bangalore region as shown here.
10:12	After you finish digitizing, right-click to end the polygon.
10:18	In the Area-1 Feature Attributes text box, type 2 in the id text box. And Greater Bangalore in the area text box.
10:30	Click on OK button.
10:33	Again click on Toggle Editing tool in the tool bar to stop editing.
10:39	Click on Save button in the Stop editing dialog box.
10:44	Right click on Area-1 layer to open attribute table.
10:49	Select Open Attribute Table from the context menu.
10:54	We can see that 2 features have been created with columns id and area type. Close the attribute table.
11:04	We can see that two polygon features have been created.
11:09	To change the color and style of polygon feature, right click on Area-1 layer. Select Properties option.
11:19	In the Layer Properties dialog-box, select Style option from the left panel.
11:26	On the top left corner of the drop down menu, select categorized.
11:32	In the column drop down select id. Click on Classify button.
11:39	Move the Layer transparency slider to 50 %.
11:44	Click on OK button at the bottom of the dialog-box.
11:49	Now on the map, we can see that the two Polygon features are in different color.
11:55	Details about labeling the features, will be discussed in upcoming tutorials in the series.
12:03	Let's summarize.
12:05	In this tutorial we have learnt to, Create and digitize Point and Polygon shape files.
12:13	Change style and color for Point and Polygon features.
12:18	As an Assignment, On the Banglaore thematic map (Bangalore.jpg), Digitize Industrial Estates Digitize the roads on the map, by creating a Polyline feature.
12:32	Your completed assignment should look as shown here.
12:37	The video at the following link summarises the spoken tutorial project. Please download and watch it.
12:45	The spoken tutorial project team conducts workshops and gives certificates on passing online tests For more details please write to us.
12:57	Please post your timed queries on this forum.
13:01	The Spoken Tutorial Project is funded by NMEICT, MHRD Government of India. More information on this mission is available at the following link.
13:13	This tutorial is contributed by Prajwal.M from Sahyadri college of Engineering and Snehalatha from IIT Bombay. Thank you for joining.

Contributors and Content Editors

PoojaMoolya