Starting from 3.26, QGIS now supports .vtpk (Vector Tile Package) files out of the box! From the changelog: ESRI vector tile packages (VTPK files) can now be opened directly as vector tile layers...
https://anitagraser.com/2023/12/15/offline-vector-tile-package-vtpk-in-qgis/
A few weeks ago, the city of Vienna released a great dataset: the so-called “Flächen-Mehrzweckkarte” (FMZK) is a polygon vector layer with an amazing level of detail which contains roads, bu...
https://anitagraser.com/2015/04/17/routing-in-polygon-layers-yes-we-can/
At FOSS4G2013, I had the pleasure to attend a presentation about the ODVIS.AT project by Marius Schebella from the FH Salzburg. The goal of the project – which ended in Summer 2014 – was “t...
https://anitagraser.com/2014/12/21/exploring-open-government-population-data-collected-by-odvis-at/
Since I finally managed to download the elevation model of the city of Vienna, I thought I’d share some eye candy with you: The map uses layer blending to combine hillshade and elevation raster...
This post covers a simple approach to calculating isochrones in a public transport network using pgRouting and QGIS. For this example, I’m using the public transport network of Vienna which is ...
https://anitagraser.com/2013/07/07/public-transport-isochrones-with-pgrouting/
Yesterday, I described my process to generate a basic population density map from the city of Vienna’s open government data. In the end of that post, I described some ideas for further improvem...
https://anitagraser.com/2012/11/18/improving-population-density-maps-using-dasymetric-mapping/
The city of Vienna provides both subdistrict geometries and population statistics. Mapping the city’s population density should be straightforward, right? Let’s see … We should be able to j...
https://anitagraser.com/2012/11/17/mapping-ogdwien-population-density/
This is a quick note on how to download features from a WFS and import them into a PostGIS database. The first line downloads a zipped Shapefile from the WFS. The second one unzips it and the las...
https://anitagraser.com/2012/09/26/wfs-to-postgis-in-3-steps/
A very common approach for mapping point density is to use heat maps. If you are aiming for a different style, give hexagonal grids a try. The workflow is very simple in QGIS: Load the point laye...
https://anitagraser.com/2012/03/04/mapping-density-with-hexagonal-grids/
The Viennese tree cadastre “Baumkataster” contains all trees growing on city property. Amongst the attributes you can find the tree species and year of plantation as well as the diameter of i...
https://anitagraser.com/2011/10/27/green-vienna-tree-cadastre/