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QGIS 2 Cookbook
Table of Contents
QGIS 2 Cookbook
Credits
About the Authors
About the Reviewers
www.PacktPub.com
eBooks, discount offers, and more
Why Subscribe?
Preface
What this book covers
What you need for this book
Who this book is for
Sections
Getting ready
How to do it…
How it works…
There's more…
See also
Conventions
Reader feedback
Customer support
Downloading the example code
Downloading the color images of this book
Errata
Piracy
Questions
1. Data Input and Output
Introduction
Finding geospatial data on your computer
Getting ready
How to do it…
How it works…
There's more…
Adding layers with the Layer menu
Adding a folder to Favorites
Nonfile data sources
Describing data sources
Getting ready
How to do it…
How it works…
There's more…
See also
Importing data from text files
How to do it…
How it works…
There's more…
See also
Importing KML/KMZ files
How to do it…
How it works…
There's more…
Importing DXF/DWG files
How to do it…
How it works…
There's more…
Opening DWG files
Opening a NetCDF file
How to do it…
How it works…
There's more…
The NetCDF Browser plugin
Saving a vector layer
Getting ready
How to do it…
How it works…
There's more…
Fine-tuning the export operation
Opening the layer after creating it
Saving a raster layer
Getting ready
How to do it…
How it works…
There's more…
Reprojecting a layer
Getting ready
How to do it…
How it works…
There's more…
Batch format conversion
Getting ready
How to do it…
How it works…
There's more…
Batch reprojection
How to do it…
How it works…
There's more…
Loading vector layers into SpatiaLite
Getting ready
How to do it…
How it works…
There's more…
See also
Loading vector layers into PostGIS
Getting ready
How to do it…
How it works…
There's more…
See also
2. Data Management
Introduction
Joining layer data
Getting ready
How to do it…
How it works…
There's more…
Cleaning up the attribute table
Getting ready
How to do it…
How it works…
There's more…
See also
Configuring relations
Getting ready
How to do it…
How it works…
Joining tables in databases
Getting ready
How to do it…
How it works…
There's more…
See also
Creating views in SpatiaLite
Getting ready
How to do it…
How it works…
There's more…
See also
Creating views in PostGIS
Getting ready
How to do it…
How it works…
There's more…
See also
Creating spatial indexes
Getting ready
How to do it…
How it works…
There's more…
See also
Georeferencing rasters
Getting ready
How to do it…
How it works…
There's more…
See also
Georeferencing vector layers
Getting ready
How to do it…
How it works…
There's more…
See also
Creating raster overviews (pyramids)
Getting ready
How to do it…
How it works…
There's more…
See also
Building virtual rasters (catalogs)
Getting ready
How to do it…
How it works…
There's more…
See also
3. Common Data Preprocessing Steps
Introduction
Converting points to lines to polygons and back – QGIS
Getting ready
How to do it…
Converting points to lines (or polygons)
Converting lines to polygons
Converting polygons to lines
Converting polygons or lines to points
How it works…
There's more…
Converting points to lines to polygons and back – SpatiaLite
Getting ready
How to do it…
Points to lines
Lines to polygons
How it works…
There's more…
See also
Converting points to lines to polygons and back – PostGIS
Getting ready
How to do it…
Converting points to lines
Converting lines to polygons
Converting lines or polygons to points
How it works…
There's more…
See also
Cropping rasters
Getting ready
How to do it…
How it works…
There's more…
See also
Clipping vectors
Getting ready
How to do it…
How it works…
There's more…
See also
Extracting vectors
Getting ready
How to do it…
How it works…
There's more…
See also
Converting rasters to vectors
Getting ready
How to do it…
How it works…
There's more…
See also
Converting vectors to rasters
Getting ready
How to do it…
How it works…
There's more…
See also
Building DateTime strings
Getting ready
How to do it…
How it works…
There's more…
See also
Geotagging photos
Getting ready
How to do it…
How it works…
There's more…
See also
4. Data Exploration
Introduction
Listing unique values in a column
Getting ready
How to do it…
How it works…
There's more…
Exploring numeric value distribution in a column
Getting ready
How to do it…
How it works...
See also
Exploring spatiotemporal vector data using Time Manager
Getting ready
How to do it…
How it works…
See also
Creating animations using Time Manager
Getting ready
How to do it…
How it works…
Designing time-dependent styles
Getting ready
How to do it…
How it works…
See also
Loading BaseMaps with the QuickMapServices plugin
Getting ready
How to do it…
How it works…
There's more…
See also
Loading BaseMaps with the OpenLayers plugin
Getting ready
How to do it…
How it works…
There's more…
See also
Viewing geotagged photos
Getting ready
How to do it…
Going a little further
How it works…
There's more…
See also
5. Classic Vector Analysis
Introduction
Selecting optimum sites
Getting ready
How to do it…
How it works…
There's more…
Dasymetric mapping
Getting ready
How to do it…
How it works…
Calculating regional statistics
Getting ready
How to do it…
How it works…
Estimating density heatmaps
Getting ready
How to do it…
How it works…
Estimating values based on samples
Getting ready
How to do it…
How it works…
There's more…
See also
6. Network Analysis
Introduction
Creating a simple routing network
Getting ready
How to do it…
How it works…
There's more…
Calculating the shortest paths using the Road graph plugin
Getting ready
How to do it…
How it works…
See also
Routing with one-way streets in the Road graph plugin
Getting ready
How to do it…
How it works…
Calculating the shortest paths with the QGIS network analysis library
Getting ready
How to do it…
How it works…
See also
Routing point sequences
Getting ready
How to do it…
How it works…
There's more…
See also
Automating multiple route computation using batch processing
Getting ready
How to do it…
Matching points to the nearest line
Getting ready
How to do it…
How it works…
Creating a routing network for pgRouting
Getting ready
How to do it…
How it works…
See also
Visualizing the pgRouting results in QGIS
Getting ready
How to do it…
How it works…
See also
Using the pgRoutingLayer plugin for convenience
Getting ready
How to do it…
How it works…
See also
Getting network data from the OSM
Getting ready
How to do it…
How it works…
7. Raster Analysis I
Introduction
Using the raster calculator
Getting ready
How to do it…
How it works…
There's more…
See also
Preparing elevation data
Getting ready
How to do it…
How it works…
There's more…
Calculating a slope
Getting ready
How to do it…
How it works…
There's more…
Using a ratio for elevation values
Other slope algorithms
Calculating the slope
See also
Calculating a hillshade layer
Getting ready
How to do it…
How it works…
There's more…
Enhancing your map view with a hillshade layer
Analyzing hydrology
Getting ready
How to do it…
How it works…
There's more…
Calculating a topographic index
Getting ready
How to do it…
How it works…
There's more…
Automating analysis tasks using the graphical modeler
Getting ready
How to do it…
How it works…
See also
8. Raster Analysis II
Introduction
Calculating NDVI
Getting ready
How to do it…
How it works…
There's more…
Extracting bands
Handling null values
How to do it…
How it works…
There's more…
Controlling the rendering of null values
Setting extents with masks
How to do it…
How it works…
There's more…
Restricting analysis to a given area
Removing superfluous no-data values
Masking using a vector mask
Sampling a raster layer
Getting ready
How to do it…
How it works…
There's more…
Other raster-vector data transfer operations
Visualizing multispectral layers
Getting ready
How to do it…
How it works…
There's more…
See also
Modifying and reclassifying values in raster layers
Getting ready
How to do it…
How it works…
There's more…
Reclassifying into classes of equal amplitude
Reclassifying into classes of equal area
See also
Performing supervised classification of raster layers
Getting ready
How to do it…
How it works…
There's more…
See also
9. QGIS and the Web
Introduction
Using web services
Getting ready
How to do it…
How it works…
There's more…
See also
Using WFS and WFS-T
Getting ready
How to do it…
How it works…
There's more…
Searching CSW
Getting ready
How to do it…
How it works…
There's more…
See also
Using WMS and WMS Tiles
Getting ready
How to do it…
How it works…
There's more…
See also
Using WCS
Getting ready
How to do it…
How it works…
There's more…
Using GDAL
Getting ready
How to do it…
How it works…
There's more…
See also
Serving web maps with the QGIS server
Getting ready
How to do it…
How it works…
There's more…
See also
Scale-dependent rendering
Getting ready
How to do it…
How it works…
There's more…
See also
Hooking up web clients
Getting ready
How to do it…
How it works…
There's more…
See also
Managing GeoServer from QGIS
Getting ready
How to do it…
How it works…
There's more…
Editing a remote style
Support for multiple formats
See also
10. Cartography Tips
Introduction
Using Rule Based Rendering
Getting ready
How to do it…
How it works…
There's more…
Handling transparencies
Getting ready
How to do it…
How it works…
There's more…
Understanding the feature and layer blending modes
Getting ready
How to do it…
How it works…
Saving and loading styles
Getting ready
How to do it…
How it works…
There's more…
Configuring data-defined labels
Getting ready
How to do it…
Example: moving and rotating a label
How it works…
There's more…
Creating custom SVG graphics
Getting ready
How to do it…
How it works…
There's more…
See also
Making pretty graticules in any projection
Getting ready
How to do it…
How it works…
There's more…
See also
Making useful graticules in printed maps
Getting ready
How to do it…
How it works…
There's more…
Creating a map series using Atlas
Getting ready
How to do it…
How it works…
There's more…
11. Extending QGIS
Introduction
Defining custom projections
Getting ready
How to do it…
How it works…
There's more…
See also
Working near the dateline
Getting ready
How to do it…
How it works…
See also
Working offline
Getting ready
How to do it…
How it works…
There's more…
See also
Using the QspatiaLite plugin
Getting ready
How to do it…
How it works…
There's more…
See also
Adding plugins with Python dependencies
Getting ready
How to do it…
How it works…
There's more…
Using the Python console
Getting ready
How to do it…
How it works…
There's more…
See also
Writing Processing algorithms
Getting ready
How to do it…
How it works…
There's more…
See also
Writing QGIS plugins
Getting ready
How to do it…
How it works…
There's more…
Creating plugins with more complex UI elements
Documenting you plugin
Releasing your plugin
Using external tools
Getting ready
How to do it…
GPSBabel
spatialite-gui
pgAdmin
How it works…
There's more…
12. Up and Coming
Introduction
Preparing LiDAR data
Getting ready
How to do it…
How it works…
There's more…
Opening File Geodatabases with the OpenFileGDB driver
Getting ready
How to do it…
How it works…
There's more…
See also
Using Geopackages
Getting ready
How to do it…
How it works…
There's more…
See also
The PostGIS Topology Editor plugin
Getting ready
How to do it…
How it works…
See also
The Topology Checker plugin
Getting ready
How to do it…
How it works…
See also
GRASS Topology tools
Getting ready
How to do it…
How it works…
There's more…
See also
Hunting for bugs
Getting ready
How to do it…
Creating a backtrace under Linux
Capturing debug output with DebugView under Windows
How it works…
There's more…
See also
Reporting bugs
Getting ready
How to do it…
How it works…
There's more…
See also
Index
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