QGIS User Guide Release 2.14 QGIS Project
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QGIS User Guide Release 2.14 QGIS Project August 08, 2017 Contents 1 Preamble 1 2 Conventions 3 2.1 GUI Conventions...........................................3 2.2 Text or Keyboard Conventions....................................3 2.3 Platform-specific instructions....................................4 3 Foreword 5 4 Features 7 4.1 View data...............................................7 4.2 Explore data and compose maps...................................7 4.3 Create, edit, manage and export data.................................8 4.4 Analyze data.............................................8 4.5 Publish maps on the Internet.....................................8 4.6 Extend QGIS functionality through plugins.............................8 4.7 Python Console............................................9 4.8 Known Issues............................................. 10 5 What’s new in QGIS 2.14 11 6 Getting Started 13 6.1 Installation.............................................. 13 6.2 Launching QGIS........................................... 14 6.3 Sample Session: Load raster and vector layers........................... 17 6.4 Projects................................................ 17 6.5 Output................................................ 18 7 QGIS GUI 19 7.1 Menu Bar............................................... 20 7.2 Panels and Toolbars......................................... 25 7.3 Map View.............................................. 31 7.4 Status Bar............................................... 32 8 General Tools 33 8.1 Keyboard shortcuts.......................................... 33 8.2 Context help............................................. 33 8.3 Rendering.............................................. 34 8.4 Color Selector............................................ 35 8.5 Blending Modes........................................... 37 8.6 Zooming and Panning........................................ 38 8.7 Measuring.............................................. 38 8.8 Select and deselect features..................................... 40 i 8.9 Data defined override setup..................................... 40 8.10 Identify features........................................... 41 8.11 Annotation Tools........................................... 42 8.12 Spatial Bookmarks.......................................... 43 8.13 Nesting Projects........................................... 44 8.14 Decorations.............................................. 45 8.15 Authentication............................................ 48 8.16 Save layer into file.......................................... 48 8.17 Use of variables for dynamic content................................ 49 9 QGIS Configuration 51 9.1 Project Properties........................................... 51 9.2 Options................................................ 53 9.3 Customization............................................ 62 10 Working with Projections 65 10.1 Overview of Projection Support................................... 65 10.2 Global Projection Specification................................... 65 10.3 Define On The Fly (OTF) Reprojection............................... 66 10.4 Custom Coordinate Reference System................................ 68 10.5 Default datum transformations.................................... 69 11 QGIS Browser 71 11.1 QGIS Browser widget........................................ 71 11.2 QGIS Browser as a standalone application............................. 72 12 Working with Vector Data 75 12.1 Supported Data Formats....................................... 75 12.2 The Symbol Library......................................... 89 12.3 The Vector Properties Dialog.................................... 96 12.4 Expressions.............................................. 139 12.5 Working with the Attribute Table.................................. 149 12.6 Editing................................................ 158 12.7 Virtual layers............................................. 172 13 Working with Raster Data 175 13.1 Working with Raster Data...................................... 175 13.2 Raster Properties Dialog....................................... 176 13.3 Raster Analysis............................................ 185 14 Working with OGC Data 189 14.1 QGIS as OGC Data Client...................................... 189 14.2 QGIS as OGC Data Server...................................... 198 15 Working with GPS Data 209 15.1 GPS Plugin.............................................. 209 15.2 Live GPS tracking.......................................... 213 16 Authentication System 219 16.1 Authentication System Overview.................................. 219 16.2 User Authentication Workflows................................... 226 16.3 Security Considerations....................................... 237 17 GRASS GIS Integration 241 17.1 Demo dataset............................................. 241 17.2 Loading GRASS raster and vector layers.............................. 241 17.3 Importing data into a GRASS LOCATION via drag and drop................... 241 17.4 Managing GRASS data in QGIS browser.............................. 242 17.5 GRASS Options........................................... 242 17.6 Starting the GRASS plugin..................................... 242 ii 17.7 Opening GRASS mapset....................................... 242 17.8 GRASS LOCATION and MAPSET................................. 243 17.9 Importing data into a GRASS LOCATION............................. 243 17.10 The GRASS vector data model................................... 245 17.11 Creating a new GRASS vector layer................................. 246 17.12 Digitizing and editing a GRASS vector layer............................ 246 17.13 The GRASS region tool....................................... 248 17.14 The GRASS Toolbox......................................... 249 18 QGIS processing framework 257 18.1 Introduction............................................. 257 18.2 The toolbox.............................................. 257 18.3 The graphical modeler........................................ 270 18.4 The batch processing interface.................................... 276 18.5 Using processing algorithms from the console........................... 279 18.6 The history manager......................................... 284 18.7 Writing new Processing algorithms as python scripts........................ 285 18.8 Handing data produced by the algorithm.............................. 287 18.9 Communicating with the user.................................... 287 18.10 Documenting your scripts...................................... 287 18.11 Example scripts........................................... 288 18.12 Best practices for writing script algorithms............................. 288 18.13 Pre- and post-execution script hooks................................. 288 18.14 Configuring external applications.................................. 288 18.15 The QGIS Commander........................................ 296 19 Print Composer 299 19.1 Overview of the Print Composer................................... 299 19.2 Composer Items........................................... 307 19.3 Creating an Output.......................................... 335 20 Plugins 341 20.1 QGIS Plugins............................................. 341 20.2 Using QGIS Core Plugins...................................... 346 20.3 Coordinate Capture Plugin...................................... 346 20.4 DB Manager Plugin......................................... 347 20.5 Dxf2Shp Converter Plugin...................................... 348 20.6 eVis Plugin.............................................. 350 20.7 fTools Plugin............................................. 359 20.8 GDAL Tools Plugin......................................... 363 20.9 Geometry Checker Plugin...................................... 366 20.10 Geometry Snapper Plugin...................................... 369 20.11 Georeferencer Plugin......................................... 369 20.12 Heatmap Plugin........................................... 373 20.13 Interpolation Plugin......................................... 377 20.14 MetaSearch Catalogue Client.................................... 378 20.15 Offline Editing Plugin........................................ 382 20.16 Oracle Spatial GeoRaster Plugin................................... 383 20.17 Raster Terrain Analysis Plugin.................................... 386 20.18 Road Graph Plugin.......................................... 387 20.19 Spatial Query Plugin......................................... 388 20.20 Topology Checker Plugin...................................... 389 20.21 Zonal Statistics Plugin........................................ 391 21 Help and Support 393 21.1 Mailing lists............................................. 393 21.2 IRC.................................................. 394 21.3 BugTracker.............................................. 394 21.4 Blog................................................. 395 iii 21.5 Plugins................................................ 395 21.6 Wiki................................................. 395 22 Appendix 397 22.1 GNU General Public License.................................... 397 22.2 GNU Free Documentation License................................. 400 23 Literature and Web References 407 Index 409 iv CHAPTER 1 Preamble This document is the original user guide of the described software QGIS. The software and hardware described in this document are in most cases registered trademarks