GIS for Mac OSX

Once, the only serious way to do much GIS work on your Mac was to use ArcGIS (or MapInfo) in a Windows virtual machine … but not anymore. QGIS Quantum GIS can now really compete with ArcGIS in terms of functionality and map creation. I miss a few things – proportional symbols for one – …

Continue reading ‘GIS for Mac OSX’ »

QGIS with R: Working with the SEXTANTE plugin

I’ve tried to get QGIS and R playing together in the past, with only occasional success. The new SEXTANTE plugin for QGIS, which provides links into a number of applications including R, SAGA and GDAL, looks really promising. Getting it working on Mac OSX was a little tricky, as there is a (known) bug in the plugin that …

Continue reading ‘QGIS with R: Working with the SEXTANTE plugin’ »

Troubleshooting install of QGIS in OSX

Yesterday afternoon I found I couldn’t run QGIS at all – it kept crashing on startup, whenever it got to the splash page “loading plugins” bit. I tried restarting without plugins running (/Applications/QGIS.app/Contents/MacOS/QGIS –noplugins) but it would still crash when I went to the “Manage Plugins …” menu option, so no chance of turning them …

Continue reading ‘Troubleshooting install of QGIS in OSX’ »

Adding KML overlays to Google Mapmaker

Editing maps in Google Mapmaker has proved to be a bit of a challenge when there isn’t a good satellite image for the area. OpenStreetMap, by comparison, has a number of editing tools that let you directly use GPS data on-screen to edit roads (but it seems to be much less straightforward to get satellite …

Continue reading ‘Adding KML overlays to Google Mapmaker’ »

Spatialite and rasterlite on OSX

Spatialite and rasterlite are libraries for SQLite, a small database system that works from single files. SQLite databases are very easy to administer and share, and are read natively by QGIS without any need for configuring drivers and passwords! These two libraries let you add spatial capabilities to SQLite. If you’re already using QGIS (and …

Continue reading ‘Spatialite and rasterlite on OSX’ »

Homebrew on OSX – easy installation of UNIX/Linux tools

“the easiest and most flexible way to install the UNIX tools Apple didn’t include with OS X.“ … and they’re right! Homebrew can help you to install a whole range of great UNIX / LINUX tools (wget for one), in single steps; an alternative is MacPorts, but I have abandoned it in favour of Homebrew as …

Continue reading ‘Homebrew on OSX – easy installation of UNIX/Linux tools’ »