It has been nearly 4.5 years since I published my idea on making desire lines using Delaunay Triangles on this blog, over 3.5 years I launched AequilibraE and about 2 years since I incorporated Delaunay Lines into AequilibraE (and made it actually usable). I have presented this concept in conferences (ATRF, TRB Modeling Aplications, and […]
The topic of this post is something I have been wanting to do since I published version 0.3 of AequilibraE, back on August 2016: Separating the aequilibrae python library (the computational engine that underlines most of the AequilibraE procedures) from the GUI part of the software (which is the QGIS interface). The goal? Being able […]
Taking the new version of AequilibraE for a ride, my first application used a data source that is very familiar to me, the Freight Analysis Framework. It is a rich data source, yet fairly small due to its large zones, thus making for pretty quick tests (even on my 9yo laptop). The first task was […]
Like most minimally experienced transportation modellers and planners, I have used multiple modelling software in professional and academic life, but I could not properly appreciate the differences between some of the different software implementations until I became myself a “developer” with AequilibraE. One of these differences is how to define and number centroids and general […]
Just as I wrote in my last post, I continue to work on a major new release for AequilibraE, which will bring brand new matrix and tabular data formats, multi-class assignment (for traffic and Delaunay Lines). While chipping away on that task, I have been busy fixing bugs reported on Github (6 in the last […]
A few of my readers have noticed my absence on this blog and the seemingly slow development of AequilibraE, so I decided to share what is going on and what the plans are for the next 6 months. The current version of AequilibraE (0.3.5.x) is the most powerful and robust version of AequilibraE yet, with […]
It has been quite a while since I last released a version of AequilibraE, but a new one just hit the QGIS repository. The long time between releases was initially due to an attempt to include select link analysis in the assignment, but a LOT happened in the meantime, and although this version still does […]
This is one more of those posts that I don’t actually believe I am making. A couple of months ago I was posed with the requirement of estimating a series of simple Multinomial Logit Models for a pretty exciting project at work, and I had to decide which tool I was going to use. Despite […]
Just like it happened for the stacked bandwidth tool, I got a “ feature request” from colleagues at work for a scenario comparison tool, much in the style available in every single commercial software available out there. However, as QGIS allows for the creation of stacked bandwidths, it was natural to create something a little […]
Since everybody in my office knows that I develop AequilibraE, every once in awhile somebody will ask me if I plan to implement a particular feature (most of which sound more like a mix of wishful thinking and feature request, of course). This dynamic has two nice components. The first one is that some pretty […]