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The use of QGIS and GRASS to deliver GIS applications to a wider audience

The use of QGIS and GRASS to deliver GIS applications to a wider audience. Ken Sanderson – Miistakis Institute FOSS4G – Sept. 27, 2007. Introduction. A Mapping Tool for the Crowsnest Pass Developable Lands project was initiated in the fall of 2005 and finished in the spring of 2006

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The use of QGIS and GRASS to deliver GIS applications to a wider audience

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  1. The use of QGIS and GRASS to deliver GIS applications to a wider audience Ken Sanderson – Miistakis Institute FOSS4G – Sept. 27, 2007

  2. Introduction • A Mapping Tool for the Crowsnest Pass • Developable Lands project was initiated in the fall of 2005 and finished in the spring of 2006 • Desire to be “proactive, not reactive” about development in the Municipality of the Crowsnest Pass • Objective – dynamic, interactive mapping tool that facilitates discussion between involved stakeholders and shows trade-offs • Built to work with closed source software used by the Municipality

  3. How It Works… • 15 themes (10 develop-ment considerations, 5 conservation priorities) • each theme converted to an “index grid” (range 0-1) • user chooses which fact-ors to include, and what priority each gets • layers combined through raster calculation to pro-duce final output • view the results

  4. The Problem • The indicated version of closed source software was not installed and thus they could not run the application (this was later rectified) • Another stakeholder had the right version of the software, but not the necessary extra licences • Other stakeholders expressed an interest in using the model, but would not be able to afford the licence • To use the model it was necessary to use a complicated GIS software package • We build tools to be used, limits on this are a matter of concern

  5. The Solution • A perfect fit for the use of FOSS: • no licence costs and the ability to distribute • After some research we decided upon the use of QGIS and GRASS for our model • GRASS provided the raster calculator functionality we needed to run our model • QGIS provides a method to use GRASS as a native windows application, which fits the needs of our users, and provides a fleshed out and intuitive user interface for viewing and using GIS data • very portable

  6. Applications +

  7. Demo Hope this works…

  8. Summary • Without loosing functionality we have moved from an application that required expensive software and no ability to share to a free application that we can share with interested stakeholders • Future Steps • QGIS 0.9, which is should be available as binaries shortly will provide Python bindings that will let us either add the application as a plugin directly inside of QGIS and/or let us add a basic map viewing interface to our application • Build a change detection tool

  9. Questions? ken at rockies dot ca http://www.rockies.ca

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