QGIS

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Quantum GIS

QGIS is a Desktop GIS application with many tools and extension also leveraging some of GRASS' power. In this workshop we will use it to display Shape files, display the same geometries after they were uploaded as Features to PostgreSQL/PostGIS. Then we will use it to digitize new point geometries into a database that we have created manually.

Updates

A nice tutorial for georeferencing and lots more around QGIS can be found here:


Please note that most of the information on this page is out-of-date.

Installation

Ubuntu 9.04 Jaunty

This installation has been tested on Ubuntu 9.04 (Jaunty Jackalope). Before you can use apt you have to edit the sources.list of your Ubuntu installation:

  • Add to /etc/sources.list:
#QGIS
deb http://ppa.launchpad.net/qgis/stable/ubuntu jaunty main
deb-src http://ppa.launchpad.net/qgis/stable/ubuntu jaunty main

This will allow you to query for the packages but as the signature can not be accessed we have to do that manually:

  • sudo apt-get update produces and error: W: GPG error: http://ppa.launchpad.net jaunty Release: Signatures could not be verified because the public key is not available: NO_PUBKEY 5227BEBD68436DDF
  • To resolve this execute:
gpg --keyserver hkp://subkeys.pgp.net --recv-keys 5227BEBD68436DDF
gpg --export --armor 5227BEBD68436DDF | sudo apt-key add -

Then the installation will work smoothly:

sudo apt-get update
sudo apt-get install qgis

Ubuntu 9.10 Karmic

To install Quantum GIS on Ubuntu Karmic, first add the repository. This can now be done comfortably via the the terminal, including signature by running:

sudo add-apt-repository ppa:ubuntugis/ubuntugis-unstable/

Then update the source list:

sudo apt-get update

Install QGIS (qgis):

sudo apt-get install qgis

Done.