Mastering QGIS Год: 2015 Автор: Kurt Menke, GISP, Dr. Richard Smith Jr., GISP, Dr. Luigi Pirelli, Dr. John Van Hoesen, GISP Издательство: Packt Publishing ISBN: 9781784398682 Язык: Английский Формат: PDF Качество: Изначально компьютерное (eBook) Интерактивное оглавление: Да Количество страниц: 420 Описание: QGIS is the leading alternative to proprietary GIS software. Although QGIS is described as intuitive, it is also, by default, complex. Knowing which tools to use and how to apply them is essential to producing valuable deliverables on time. Starting with a refresher on QGIS basics, this book will take you all the way through to creating your first custom QGIS plugin. By the end of the book, you will understand how to work with all the aspects of QGIS, and will be ready to use it for any type of GIS work. From the refresher, you will learn how to create, populate, and manage a spatial database and walk through styling GIS data, from creating custom symbols and color ramps to using blending modes. In the next section, you will discover how to prepare vector and raster data for processing and discover advanced data creation and editing techniques. The last third of the book covers more technical aspects of QGIS, including working with the Processing Toolbox, how to automate workflows with batch processing, and how to create graphical models. Finally, you will learn how to create and run Python data processing scripts and write your own QGIS plugin with pyqgis.
Примеры страниц
Оглавление
1: A Refreshing Look at QGIS QGIS download and installation Tour of QGIS Loading data Working with coordinate reference systems Working with tables Editing data Composing maps Adding functionality with plugins Summary 2: Creating Spatial Databases Fundamental database concepts Creating a spatial database Importing data into a SpatiaLite database Exporting tables out of SpatiaLite as a shapefile Managing tables Creating queries and views Summary 3: Styling Raster and Vector Data Choosing and managing colors Managing color ramps Styling single band rasters Styling multiband rasters Creating a raster composite Raster color rendering Raster resampling Styling vectors Vector layer rendering Using diagrams to display thematic data Saving, loading, and setting default styles Summary 4: Preparing Vector Data for Processing Merging shapefiles Creating spatial indices Checking for geometry errors Converting vector geometries Using basic vector geoprocessing tools Defining coordinate reference systems Advanced field calculations Complex spatial and aspatial queries Summary 5: Preparing Raster Data for Processing Reclassifying rasters Rescaling rasters Creating a raster mosaic Generating raster overviews (pyramids) Converting between raster and vector data models Creating raster surfaces via interpolation Summary 6: Advanced Data Creation and Editing Creating points from coordinate data Geocoding address-based data Georeferencing imagery Checking the topology of vector data Repairing topological errors via topological editing Summary 7: The Processing Toolbox About the processing toolbox Performing raster analyses with GRASS SAGA Exploring hydrologic analyses with TauDEM R Summary 8: Automating Workflows with the Graphical Modeler An introduction to the graphical modeler Opening the graphical modeler Configuring the modeler and naming a model Adding inputs Adding algorithms Running a model Editing a model Documenting a model Saving, loading, and exporting models Executing model algorithms iteratively Nesting models Using batch processing with models Converting a model into a Python script Summary 9: Creating QGIS Plugins with PyQGIS and Problem Solving Webography - where to get API information and PyQGIS help The Python Console Exploring iface and QGis Exploring a QGIS API in the Python Console Creating a plugin structure with Plugin Builder A simple plugin example Setting up a debugging environment Debugging session example Summary 10: PyQGIS Scripting Where to learn Python basics Loading layers Vector structure Iterating over features Editing features Running processing toolbox algorithms Running an external algorithm or command Interacting with the map canvas Summary
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