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  • Book Overview & Buying Mastering QGIS
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Mastering QGIS

Mastering QGIS

By : Kurt Menke, GISP
4.6 (12)
Buy this Book
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Mastering QGIS

Mastering QGIS

4.6 (12)
By: Kurt Menke, GISP
Buy this Book

Overview of this book

If you are a GIS professional, a consultant, a student, or perhaps a fast learner who wants to go beyond the basics of QGIS, then this book is for you. It will prepare you to realize the full potential of QGIS.
Table of Contents (12 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. A Refreshing Look at QGIS
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1. A Refreshing Look at QGIS
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QGIS download and installation
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Tour of QGIS
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Loading data
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Working with coordinate reference systems
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Working with tables
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Editing data
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Composing maps
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Adding functionality with plugins
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Summary
2
2. Creating Spatial Databases
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2. Creating Spatial Databases
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Fundamental database concepts
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Creating a spatial database
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Importing data into a SpatiaLite database
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Exporting tables out of SpatiaLite as a shapefile
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Managing tables
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Creating queries and views
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Summary
3
3. Styling Raster and Vector Data
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3. Styling Raster and Vector Data
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Choosing and managing colors
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Managing color ramps
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Styling single band rasters
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Styling multiband rasters
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Creating a raster composite
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Raster color rendering
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Raster resampling
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Styling vectors
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Vector layer rendering
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Using diagrams to display thematic data
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Saving, loading, and setting default styles
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Summary
4
4. Preparing Vector Data for Processing
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4. Preparing Vector Data for Processing
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Merging shapefiles
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Creating spatial indices
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Checking for geometry errors
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Converting vector geometries
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Using basic vector geoprocessing tools
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Defining coordinate reference systems
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Advanced field calculations
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Complex spatial and aspatial queries
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Summary
5
5. Preparing Raster Data for Processing
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5. Preparing Raster Data for Processing
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Reclassifying rasters
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Rescaling rasters
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Creating a raster mosaic
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Generating raster overviews (pyramids)
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Converting between raster and vector data models
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Creating raster surfaces via interpolation
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Summary
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6. Advanced Data Creation and Editing
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6. Advanced Data Creation and Editing
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Creating points from coordinate data
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Geocoding address-based data
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Georeferencing imagery
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Checking the topology of vector data
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Repairing topological errors via topological editing
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Summary
7
7. The Processing Toolbox
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7. The Processing Toolbox
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About the processing toolbox
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Performing raster analyses with GRASS
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SAGA
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Exploring hydrologic analyses with TauDEM
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R
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Summary
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8. Automating Workflows with the Graphical Modeler
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8. Automating Workflows with the Graphical Modeler
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An introduction to the graphical modeler
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Opening the graphical modeler
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Configuring the modeler and naming a model
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Adding inputs
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Adding algorithms
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Running a model
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Editing a model
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Documenting a model
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Saving, loading, and exporting models
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Executing model algorithms iteratively
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Nesting models
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Using batch processing with models
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Converting a model into a Python script
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Summary
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9. Creating QGIS Plugins with PyQGIS and Problem Solving
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9. Creating QGIS Plugins with PyQGIS and Problem Solving
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Webography - where to get API information and PyQGIS help
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The Python Console
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Exploring iface and QGis
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Exploring a QGIS API in the Python Console
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Creating a plugin structure with Plugin Builder
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A simple plugin example
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Setting up a debugging environment
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Debugging session example
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Summary
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10. PyQGIS Scripting
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10. PyQGIS Scripting
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Where to learn Python basics
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Loading layers
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Vector structure
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Iterating over features
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Editing features
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Running processing toolbox algorithms
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Running an external algorithm or command
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Interacting with the map canvas
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Summary
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Index
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Index

Chapter 4. Preparing Vector Data for Processing

Typically, raw data obtained for a GIS project needs to be massaged for use in the specific application. It may need to be merged, converted to a different geometry type, saved to the coordinate reference system of the project, subset to the extent of the study area, or subset by attribute values. While QGIS provides a powerful set of tools that can handle many types of vector preparation and transformation tasks, this chapter will cover what we consider to be commonly used vector-preparation tasks. Many of the tools covered in this chapter are found on the Vector menu in QGIS; however, others are available in the processing toolbox. Additional vector processing tasks will be covered in Chapter 7, The Processing Toolbox and Chapter 8, Automating Workflows with the Graphical Modeler. The topics that we will cover in this chapter are as follows:

  • Merging shapefiles
  • Creating spatial indices
  • Checking for geometry errors
  • Converting vector...
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Mastering QGIS
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