Desde su adopción reciente en ArcGIS, Python tiene mucho éxito en el mundo de los SIG y cualquier aficionado a Python debería alegrarse, y este título puede parecer extraño para algunos. Sin embargo, es una realidad.

En este artículo muestro cómo visualizar en 3D capas vectoriales (bien sean shapefiles de tipo 3D o shapefiles con atributo de altitud) con los módulos Python Shapely, Matplotlib y Visvis desde la consola Python de Quantum GIS.

Paper and slides of a presentation given in GI Zeitgeist 2012, in Münster, Germany.

This must be the shortest post ever in GeoTux. It is just for you to know about the "Remove empty layers" plugin that I wrote for Quantum GIS some time ago.

I have added an SQL console to the pgAdmin3 plugin "PostGIS viewer". It allows you to run SQL queries on PostGIS data in order to filter them or execute spatial functions on them.

The following is a basic algorithm to get routes in a network using only qualitative spatial reasoning by means of SparQ reasoner and QGIS to visualize the result.

I have added a QGIS plugin to the PostGIS Viewer for building SQL querys allowing the results to be displayed as a new layer. The plugin is RT Sql Layer from the Faunalia's repository, extracting just its SQL Query Builder.

Due to some suggestions from Ivan Mincik and Iván Lizarazo, I have been adding a couple of functionalities to the postgis viewer plugin for pgAdmin. Now, it has raster support (PostGIS-WKTRaster) and a layer list widget for displaying layer properties. Additionally, some minor bugs have been fixed: antialiasing and map units detection.

A couple of months ago, Ivan Mincik released a PostGIS viewer for pgAdmin using the Python version of QGIS libraries. I have taken the source code to add some functionality: now, every new layer is added to the same application and the scale and cursor coordinates are displayed.

QGIS provides several utilities for Python developers. However, if you want to build your own PyQGIS application, you have to create some widgets on your own. The layer list widget is one of them and it certainly is a must for GIS applications. Here is mine.