My articles

Catchment Area Calculation with pgRouting
April 21, 2017

This post is written as response to Michal Zimmermann’s article “Routing with pgRouting: Catchment Area Calculation ”. Michal’s article was interesting to read, and it definitely contains some valid points of criticism.

pgRouting preview: the new VRP solver
December 5, 2013

This is a guest post of “St. Nikolaus”. It is written for the Japanese FOSS4G Advent Calendar 2013 and it’s probably again the only one in English as in 2012 .

FOSS4G Presentation about pgRouting
November 15, 2013

In 2013 pgRouting was presentated at three FOSS4G events, in Nottingham , Tokyo and Osaka . In case you have missed them all, take a look at the presentation slides:

pgRouting announces pgRouting 2.0.0 release
September 27, 2013

This 2.0 release brings a number of major new features: All Pairs Shortest Path, Johnson’s Algorithm NEW All Pairs Shortest Path, Floyd-Warshall Algorithm NEW Shortest Path A* Bi-directional Dijkstra Shortest Path NEW Bi-directional A* Shortest Path NEW Shortest Path Dijkstra Driving Distance K-Shortest Path, Multiple Alternative Paths NEW K-Dijkstra, One to Many Shortest Path NEW Traveling Sales Person NEW Implementation Turn Restriction Shortest Path (TRSP) NEW New functions for creating routing topology New functions for analyzing a graph for problems pgRouting 2.

pgRouting 2.0 is coming soon
August 5, 2013

With the (inofficial) alpha, beta and rc1 release of the new pgRouting 2.0.0 lots of smaller and bigger issues have been fixed: for example TSP now accepts a start and also an end point, the “develop” branch is checked on Travis CI with every commit and tested with different versions of PostgreSQL/PostGIS, the documentation can be translated with Transifex , etc.

Georepublic at FOSS4G in Notthingham
August 4, 2013

In September the annual FOSS4G will take place in Nottingham, and beside being a sponsor Georepublic will attend the event with three of us travelling from Tokyo and Osaka. We are also planning to attend State of the Map in Birmingham, UK and the Quantum GIS Developer Meeting in Brighton before heading to FOSS4G.

Leaflet example with WFS-T
December 15, 2012

This article is supposed to be No. 15 in the Japanese FOSS4G Advent Calendar 2012 and it’s probably the first and last one in English for this year. First I wanted to build pgRouting Ubuntu packages and write about it, but then I saw the other great blog posts and decided to change the topic.

How to contribute to an existing Octopress blog
November 27, 2012

You managed to setup your own Octopress blog? Great! After a while you switch to another PC or your colleague wants to contribute an article and nothing worked as easy

The Georepublic Times is using Octopress
October 4, 2012

Let’s start with a first post about how to publish articles on Georepublic’s brand-new blog. Since the writing of blog articles has almost stalled in this year, even if Georepublic’s population nearly doubled since 2011, there was probably something wrong the old blog system.

PostGIS and pgRouting template
February 7, 2011

When creating a new database in PostgreSQL using the standard template, PostGIS and pgRouting functions and tables are missing of course. You can add these functions and tables one by one, but doing this every time for every single database is annoying work.

pgRouting Project News
November 22, 2010

It has been a long way but finally we made it: I’m glad to be able to announce the new pgRouting website, that also comes with a lot of other changes and news!

Georepublic at FOSS4G 2010 Japan in Tokyo and Osaka
October 30, 2010

2010 is also Georepublic’s first year at the local FOSS4G conference in Japan. The 2-days conference + 1 day workshop will take place October 31st to November 2nd in Tokyo and November 5th, 6th and 8th (workshops) in Osaka.