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Leveraging Open Source GIS with Python: A QGIS Approach

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Gerry James
Gerry James

The accompanying slide presentation to a webinar I gave back in may showing the power of Python with open source tools like Quantum GIS (QGIS) and PostGIS.

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A Quantum GIS Approach
The power of any GIS lies in the customization Many embedded objects and processes available A variety of programming and scripting languages Plug-in, add-on, extension... Stand alone using API and ActiveX
An Introduction to Quantum GIS (QGIS) An Introduction to Python An Introduction to Qt An Overview of Python Bindings Using the Python Shell in QGIS Writing your first QGIS plugin
What is it? How does it compare? What can it do? Why use QGIS?
What is it? How does it compare? What can it do? Why use Python?
Off we go to the demo...
What is it? What can it do? Why use Qt? What else? pyuic4 pyrcc4
Off we go to the demo...
What are QGIS Python Bindings Python libraries that are accessible to QGIS Python Core/GUI (Version 2.5) and PyQt4 (main bindings) How do they work? Calls to the libraries in the code... from PyQt4.QtCore import * from qgis.core import * What are they used for? Access to Python functions within QGIS Math String Logic Regular expressions Loops
Off we go to the demo...
What are they? Extend the functionality of QGIS Python or C++ Made up of GUI (Qt) and Python Code Do I have to make all of my own? Plenty available on the internet Where can I get them? Plugins ? Fetch Python Plugins How do I install them? Above method...installs for you Place entire directory in your Python Plugin directory ~.qgis/python/plugins How do I manage them? Plugins ? Manage Plugins
Off we go again to the demo...
Why QGIS? Open source and free Extensable development environment Many geoprocessing functions and objects Why Python? Integrated very well with QGIS Well established programming language Works very well with Qt for forms etc Python Bindings gives the power of programming to QGIS QGIS Plugins the real power of QGIS lots of QGIS and third party plugins available
How to get more training.... Contact Carteryx @ [email_address] or 778.668.5025 More training classes to come (watch http://www.carteryx.com ) Pre-defined and Personalized training.... Links http://www.qgis.org http://forum.qgis.org http://blog.qgis.org/ http://wiki.qgis.org/qgiswiki http://www.python.org http://www.diveintopython.org/
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Leveraging Open Source GIS with Python: A QGIS Approach

  • 1. A Quantum GIS Approach
  • 2. The power of any GIS lies in the customization Many embedded objects and processes available A variety of programming and scripting languages Plug-in, add-on, extension... Stand alone using API and ActiveX
  • 3. An Introduction to Quantum GIS (QGIS) An Introduction to Python An Introduction to Qt An Overview of Python Bindings Using the Python Shell in QGIS Writing your first QGIS plugin
  • 4. What is it? How does it compare? What can it do? Why use QGIS?
  • 5. What is it? How does it compare? What can it do? Why use Python?
  • 6. Off we go to the demo...
  • 7. What is it? What can it do? Why use Qt? What else? pyuic4 pyrcc4
  • 8. Off we go to the demo...
  • 9. What are QGIS Python Bindings Python libraries that are accessible to QGIS Python Core/GUI (Version 2.5) and PyQt4 (main bindings) How do they work? Calls to the libraries in the code... from PyQt4.QtCore import * from qgis.core import * What are they used for? Access to Python functions within QGIS Math String Logic Regular expressions Loops
  • 10. Off we go to the demo...
  • 11. What are they? Extend the functionality of QGIS Python or C++ Made up of GUI (Qt) and Python Code Do I have to make all of my own? Plenty available on the internet Where can I get them? Plugins ? Fetch Python Plugins How do I install them? Above method...installs for you Place entire directory in your Python Plugin directory ~.qgis/python/plugins How do I manage them? Plugins ? Manage Plugins
  • 12. Off we go again to the demo...
  • 13. Why QGIS? Open source and free Extensable development environment Many geoprocessing functions and objects Why Python? Integrated very well with QGIS Well established programming language Works very well with Qt for forms etc Python Bindings gives the power of programming to QGIS QGIS Plugins the real power of QGIS lots of QGIS and third party plugins available
  • 14. How to get more training.... Contact Carteryx @ [email_address] or 778.668.5025 More training classes to come (watch http://www.carteryx.com ) Pre-defined and Personalized training.... Links http://www.qgis.org http://forum.qgis.org http://blog.qgis.org/ http://wiki.qgis.org/qgiswiki http://www.python.org http://www.diveintopython.org/