I’ve been teaching myself to use Quantum GIS, an open source geographic information system, by using it to build the maps for a practical assignment to do a feasibility study of a small windfarm.

You can get a copy of the software at the QGIS website, and there are tutorials and introduction documents around the web.    This post is to pick up a few things that took me a while to figure out.  They’re notes for me, and they might be handy for someone else.

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