Quantum GIS Training Manual - the QGIS Training Manual!

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Quantum GIS Training Manual, Release 1.0 12 Chapter 2. Module: The Interface
CHAPTER 3 Module: Creating a Basic Map In this module, you will create a basic map which will be used later as a basis for further demonstrations of QGIS’ functionality. 3.1 Lesson: Working with Vector Data Vector data is arguably the most common kind of data you will find in the daily use of GIS. It describes geographic data in terms of points, that may be connected into lines and polygons. Every object in a vector dataset is called a feature, and is associated with data that describes that feature. The goal for this lesson: To learn about the structure of vector data, and how to load vector datasets into a map. 3.1.1 Follow along: Viewing layer attributes It’s important to know that the data you will be working with does not only represent where objects are in space, but also tells you what those objects are. From the previous exercise, you should have the streets layer loaded in your map. What you can see right now is merely the position of the roads. To see all the data available to you: • Click on this button: It will show you a table with more data about the streets layer. This extra data is called attribute data. The lines that you can see on your map represent where the streets go; this is the spatial data. These definitions are commonly used in GIS, so it’s essential to remember them! • You may now close the attribute table. 13
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Page 7 and 8: 1.1 Background CHAPTER 1 Foreword I
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• Reactivate labeling for the pla
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4.2.10 What’s next? Quantum GIS T
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• Change the Column to TOWN and t
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Quantum GIS Training Manual, Releas
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This gets rid of the ugly classes s
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This gives us a nice map: Quantum G
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• Select the empty category. •
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• Click OK. Quantum GIS Training
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• Double-click on it so that it a
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• Click OK. • Choose a suitable
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4.3.4 Try yourself... Refine the cl
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• Apply this symbology. Your map
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CHAPTER 5 Module: Creating Maps In
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The map will appear on the page.
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• Use this interface to set the f
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• Click the Show frame checkbox t
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formats to choose from: • Export
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CHAPTER 6 Module: Creating Vector D
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6.1.2 Follow along: Data sources Qu
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• the Move Feature(s) tool to mov
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• Digitize this new (fictional) f
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6.2.4 Follow along: Correct topolog
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The topologically correct border lo
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• Move the slider from side to si
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6.2.9 Follow along: Tool: Reshape F
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The result of the above: Quantum GI
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• Click OK. • Apply the changes
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• Add a new column: Quantum GIS T
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• Click OK on the Layer Propertie
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• The image for that property wil
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Now to test the new action! Quantum
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CHAPTER 7 Module: Vector Analysis N
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• Click on it to select it, then
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• Click OK. • Start a new map:
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7.1.6 Further reading Quantum GIS T
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• Note that we’re now checking
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• Click OK and you’ll see the r
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• Click OK. Your results should l
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7.3 Lesson: Network Analysis Quantu
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• Time unit: hour • Distance un
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• Add the aerial photographs unde
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• Set the SPEED value for all the
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Notice the values of Length and Tim
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And these are the smaller streets,
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• Look at the metadata for this l
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On Windows Quantum GIS Training Man
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CHAPTER 8 Module: Rasters We’ve u
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would be better to have one file fo
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8.2.3 In conclusion Quantum GIS Tra
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• Set the Global transparency to
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loaded into your map. Quantum GIS T
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8.3.6 Try yourself... Quantum GIS T
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8.3.8 Follow along: Simplifying the
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CHAPTER 9 Module: Completing the An
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• Input file is all_terrain; Quan
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9.2.2 Try yourself... Inspecting th
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• Click OK. Quantum GIS Training
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• Navigate to your Rasterprac dir
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• Name the output file rural.shp.
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9.4.20 Clipping a vector layer Quan
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CHAPTER 10 Module: Plugins Plugins
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• Click OK and the relief will be
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• Check the box beside it. • No
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• Double-click in the Value field
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CHAPTER 11 Module: Online Resources
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• The value of the Name field sho
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• Choose WGS 84 / World Mercator
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11.1.2 Try yourself... • Hide the
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CHAPTER 12 Module: GRASS GRASS (Geo
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• You may now remove the original
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• Set it up as shown: Quantum GIS
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• Select item: Select an item and
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Use your own data for this section.
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• Do the same as in the section a
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CHAPTER 14 Module: PostgreSQL Postg
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insert into person (age) values (40
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14.1.13 Transactions Quantum GIS Tr
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14.2.4 Verify the new account psql
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Indexes: "streets_pkey" PRIMARY KEY
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There are two ways to do this: •
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drop table people; Quantum GIS Trai
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14.3.5 Delete Data Quantum GIS Trai
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Joe Bloggs | 3 Rusty Bedsprings | 3
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select * from streets where id=1 )
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14.4.8 What’s next? Quantum GIS T
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To test that the rule works, let’
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CHAPTER 15 Module: PostGIS PostGIS
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15.1.5 Install spatial_refsys.sql Q
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Check your results 15.2.5 Populate
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Password: Quantum GIS Training Manu
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Result: Quantum GIS Training Manual
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Select by location Get all the buil
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In QGIS: WHERE TOUCHES(a.the_geom,
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Check your results Quantum GIS Trai
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Check your results 15.5.4 Looking a
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15.5.9 Geometry Cleaning You can ge
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CHAPTER 16 Appendix: Contributing T
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16.4 Adding a Lesson To add a lesso
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.. _answer-name: Quantum GIS Traini
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‘Descriptive link text ‘_ • R
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17.1 Results for Adding Your First
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Back to text 17.4 Results for Symbo
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Back to text 17.4.4 Symbol Levels T
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• Now your symbol should look lik
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Back to text 17.4.5 Symbol Levels
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17.6 Results for The Label Tool 17.
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17.7 Results for Classification 17.
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Back to text 17.8.2 Topology: Avoid
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17.8.5 Merge Features Quantum GIS T
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17.9.2 Distance from High Schools
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Back to text Quantum GIS Training M
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• 5 degrees: Quantum GIS Training
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Consider a circular area, continuou
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The yellow farms are selected. Quan
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Back to text 17.12.2 Adding a New W
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• genindex • modindex • searc
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