Adventures with SD cards in the field

We got some variable results with SD cards in some recent fieldwork – cameras not taking photos as regularly as possible, transfer rates not as advertised – and some research turned up even more disturbing news about SD cards and what to watch out for. SD cards are cheap because they are fundamentally made of …

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QGIS on an Android tablet

Running QGIS on an android phone worked just fine – but running QGIS on an Android tablet is going to be a lot more useful, with a larger screen. I summarised the steps of installing QGIS on a Galaxy Advance (I9070) in a previous post, under Gingerbread (2.3.6); since then, there have been some issues …

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QGIS on an Android tablet

Running QGIS on an android phone worked just fine – but running QGIS on an Android tablet is going to be a lot more useful, with a larger screen. I summarised the steps of installing QGIS on a Galaxy Advance (I9070) in a previous post, under Gingerbread (2.3.6); since then, there have been some issues …

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QGIS on Android phone: Installing

There is a more up-to-date version of this page detailing the installation on an Asus TF300T tablet here. I decided to try out QGIS on my Samsung Galaxy Advance – a little 4-inch screen, but why not? I’d run through the same process on an Asus TF300 tablet previously (much larger screen and more appropriate …

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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 ‚Ķ” menu option, so no chance of turning them …

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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 …

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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 …

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