Posts in category OSGeo

How big was that database?

Database servers are great, but there's a lot of magic in there sometimes and it can be hard to figure just how much storage is being taken up by what database and which tables.

A nice little hint on how to check the size of the whole or parts of you database server (Postgres):  http://feeding.cloud.geek.nz/2009/02/finding-size-of-postgres-database-on.html

Or for the lazy

SELECT pg_database.datname,
       pg_size_pretty(pg_database_size(pg_database.datname)) AS size
  FROM pg_database;

Open Source Mapping Workflow

This quarter some students and professors got together to reinvent/recreate/re-instigate  Cartography at UC Davis. While this isn't my first Cartography course it's been a bit more realistic in terms of applying the ideas to making maps.

Below is an example of mine, showing the possibilities of an Open Source cartographic workflow. I used  Spatialite to crunch the data,  QGIS to prep and  Inkscape to Polish.

It's a semi-ficticous map showing major air routes that cross the Arctic Circle using data from  http://OpenFlights.org and a background map from  http://NaturalEarthData.com

I'll link to the full pdf later. Creative Commons license in the footer applies.