Creating Multiple Concentric Ring Buffers in PostGIS

Whenever possible I recently try to get all my GIS work done in QGIS. Most of the time this is no problem at all. Sometimes it makes things even easier, such as when you’re trying to work with your geospatial data in a PostgreSQL/PostGIS database (good luck trying that in ArcGIS!). But sometimes you come across a task that is just so exotic that nobody has ever come across it. Or at least nobody wrote about coming across it…

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Setting up QGIS 2 on MacOS X 10.9 Mavericks

[UPDATE: Find informations about installing QGIS 2.4 in this newer article.]

After a hardware failure on my MacBook Pro’s hard disk in the end of last year (replaced for free within half a day at the Apple Store, thanks to my Apple Care Protection Plan) and an extended christmas and new year holiday I’m currently being struck down by a nasty cold and hence decided I have some spare time on my hands to give the latest Mac OS X version 10.9 “Mavericks” a try. It had been released in October, but I had been too busy to play around with it, so far. Obviously I’m not going to screw up my main production machine, the iMac, but instead designated my old, trusted MacBook Pro to be the guinea-pig.

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