ダニエル

Catchment Area Calculation with pgRouting

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. The drive-time polygons definitely don’t look as one would expect! I couldn’t believe, that this is pgRouting’s fault, because the result always looked OK when using the drive-time and polygon generating functions. So hwo can it be done better?

pgRouting preview: the new VRP solver

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 .

Let me introduce myself: My name is “St. Nikolaus” and December 6th is my day.

FOSS4G Presentation about pgRouting

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:

2013 was a very successful year for the pgRouting project, but we hope 2014 will become even better!

pgRouting announces pgRouting 2.0.0 release

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 2.0 is not backwards compatible with the 1.x version. This is a significant overhaul of the whole pgRouting environment and we have renamed all the functions and rationalized the arguments and return types. While this will be a painful migration for 1.x applications, we believe the new functionality, the high quality of the code, and new documentation will make it much easier to grow the product and support it over future releases.

pgRouting 2.0 is coming soon

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

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

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

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 as I expected.

The Georepublic Times is using Octopress

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. Because we’re all not very ambitious novelists, there had to be something that we were more familiar with.

PostGIS and pgRouting template

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

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! I hope the migration doesn’t produce a lot of confusion but makes it easier to participate in the project and make development faster and better!

Georepublic at FOSS4G 2010 Japan in Tokyo and Osaka

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.