Python Geospatial Development Essentials

Description

This book is ideal for Python programmers who are tasked with or wish to make a special-purpose GIS application. Analysts, political scientists, geographers, and GIS specialists seeking a creative platform to experiment with cutting-edge spatial analysis, but who are still only beginners in Python, will also find this book beneficial. Familiarity with Tkinter application development in Python is preferable but not mandatory. Cover Copyright Credits About the Author About the Reviewers www.PacktPub.com Table of Contents Preface Chapter 1: Preparing to Build Your Own GIS Application Why re-invent the wheel? Setting up your computer Installing third-party packages Imagining the roadmap ahead Summary Chapter 2: Accessing Geodata The approach Vector data A data interface for vector data The vector data structure Computing bounding boxes Spatial indexing Loading vector files Shapefile GeoJSON File format not supported Saving vector data Shapefile GeoJSON File format not supported Raster data A data interface for raster data The raster data structure Positioning the raster in coordinate space Nodata masking Loading raster data GeoTIFF File format not supported Saving raster data GeoTIFF File format not supported Summary Chapter 3: Designing the Visual Look of Our Application Setting up the GUI package Creating the toolkit building blocks Themed styling Basic buttons Buttons with icons Toolbars The Ribbon tab system The bottom status bar The layers pane The Map widget Popup windows Dispatching heavy tasks to thread workers Using the toolkit to build the GUI Testing our application Summary Chapter 4: Rendering Our Geodata Rendering Installing PyAgg A sequence of layers The MapCanvas drawer Individual layer renderings Vector layers Raster layers Interactively rendering our maps Linking the MapView to the renderer Requesting to render a map Resizing the map in proportion to window resizing The LayersPane as a LayerGroup Adding layers Editing layers in the LayersPane widget Click-and-drag to rearrange the layer sequence Zooming the map image Map panning and one-time rectangle zoom A navigation toolbar Putting it all together Summary Chapter 5: Managing and Organizing Geographic Data Creating the management module Inspecting files Organizing files Vector data Splitting Merging Geometry cleaning Raster data Mosaicking Resampling Weaving functionality into the user interface Layer-specific right-click functions Defining the tool options windows Setting up the management tab Defining the tool options windows Summary Chapter 6: Analyzing Geographic Data Creating the analysis module Analyzing data Vector data Overlap summary Buffer Raster data Zonal statistics Weaving functionality into the user interface Layer-specific right-click functions Defining the tool options windows Setting up the analysis tab Defining the tool options window Summary Chapter 7: Packaging and Distributing Your Application Attaching an application logo The icon image file Assigning the icon The application startup script Packaging your application Installing py2exe Developing a packaging strategy Creating the build script Adding the visual C runtime DLL Creating an installer Installing Inno Setup Setting up your application's installer Summary Chapter 8: Looking Forward Improvements to the user interface Saving and loading user sessions File drag and drop GUI widgets Other variations of the user interface Adding more GIS functionality Basic GIS selections More advanced visualization Online data services Converting between raster and vector data Projections Geocoding Going the GDAL/NumPy/SciPy route Expanding to other platforms Touch devices Summary Index