Installing PostGIS 2.0 on ubuntu

Posted by & filed under Postgres & PostGIS, QGIS.

PostGIS 2.0 is out and the awesomness continues! You can install PostGIS 2.0 on Ubuntu using packages which is exactly what I am going to show you here. Read on for details on how to get up and running and do your first simple raster analysis!

Specifying options in the QGIS GDAL Tools

Posted by & filed under QGIS.

You probably looked at the GDAL Tools (under the raster menu in QGIS) and  blissfully ignored that ‘Creation Options’ panel that appears near the bottom of some dialogs. This is definately a power user feature, but a very handy one. In this quick article I will show you how to compress the rasters you create… Read more »

A python layer action to open a wikipedia page in QGIS

Posted by & filed under QGIS.

One of the really cool features in QGIS that doesn’t get much press is the ability to run actions based on a feature selection. Under 1.7.4 this works by using the identify tool and then choosing an action from the action list in the identified feature(s) attributes. A new improvement in QGIS master (and should… Read more »

A good quality world borders dataset

Posted by & filed under QGIS.

Some time ago I spent at least a day trying to find a good quality, free world political borders and coastlines dataset. Each product I found had some limitation – incomplete coverage or poor resolution. Today by happenstance a client pointed me to quite a good one.

Contrast and cartography – gdal_lightner

Posted by & filed under QGIS.

If you work with raster data in GIS you straddle a kind of wierd world where you deal with imagery but you cannot really manipulate the imagery as you would say with the GIMP or Photoshop. Conversely, if you ever tried to open a large GIS raster dataset with the GIMP you may have noticed… Read more »

Publishing multiple projects with QGIS Server

Posted by & filed under QGIS.

You know the drill right? You just made a beautiful map for your boss using QGIS Server. Then he walks into your office and says ‘Kiepie, I need another one in a different CRS’. Your heart drops in your chest and your jaw drops to the desk. You can’t do that using QGIS without publishing… Read more »