In the past, network analysis capabilities in QGIS were rather limited or not straight-forward to use. This has changed! In QGIS 3.x, we now have a wide range of network analysis tools, both for ...
https://anitagraser.com/2019/07/07/five-qgis-network-analysis-toolboxes-for-routing-and-isochrones/
Wrong navigation instructions can be annoying and sometimes even dangerous, but they happen. No dataset is free of errors. That’s why it’s important to assess the quality of datasets. One spe...
https://anitagraser.com/2016/07/23/osm-turn-restriction-qa-with-qgis/
As announced in Salzburg a few days ago, I’m happy to present the lastest enhancement to my IDF router for QGIS: travel time routing and catchment computation. Travel times for pedestrians and ...
https://anitagraser.com/2016/07/17/traveltime-routing-catchment-extension-for-the-qgis-idf-router/
Monday, January 4th 2016, was the open data release date of the official Austrian street network dataset called GIP.at. As far as I know, the dataset is not totally complete yet but it should be ...
https://anitagraser.com/2016/01/06/a-qgis-router-for-gip-at/
This is a follow-up on my previous post introducing an Open source IDF parser for QGIS. Today’s post takes the code further and adds routing functionality for foot, bike, and car routes includi...
https://anitagraser.com/2015/08/01/open-source-idf-router-for-qgis/
It’s my pleasure to report back from this year’s AGIT and GI_Forum conference (German and English speaking respectively). It was great to meet the gathered GIS crowd! If you missed it, don’...
https://anitagraser.com/2015/07/11/agit-gi_forum-2015-wrap-up/
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/
Correct turn restriction information is essential for the vehicle routing quality of any street network dataset – open or commercial. One of the challenges of this kind of information is that t...
https://anitagraser.com/2014/12/13/qa-for-turn-restrictions-in-osm/
Did you know that there is a network analysis library in QGIS core? It’s well hidden so far, but at least it’s documented in the PyQGIS Cookbook. The code samples from the cookbook can be use...
https://anitagraser.com/2013/10/19/a-routing-script-for-the-processing-toolbox/
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/