Before we begin, let us say that we will be speaking from a transportation modelling perspective, but there is no reason why this would not be true for other fields that rely heavily on (proprietary) software. Now back to the topic at hand. The origin of our concerns There are many things in transportation modelling […]
If one takes a look at the AequilibraE code, they will find an unusual amount of NumPy gymnastics that would definitely point to a world with no Pandas. It is the case, however, that Pandas is not only alive and well, but it also has a large number of features that would greatly accelerate the […]
A couple of months ago, somebody from the World Bank asked me for suggestions on how to go about computing a distance matrix between a series of points spread throughout India using Open-Street-Maps or something similar. Computing path computations on large networks are nothing new, nor is it to compute skim matrices for a large […]
I have now mentioned in two blog posts that I have missed an important blog post on the amazing work that my friend Andrew O’Brien and I did about 3 years ago (even though I have bragged about it to everybody I know in this industry). So since this was a truly collaborative effort, I […]
I have been using the routing tools inside Google OR-Tools for quite a while now, and I must say that it behaves incredibly well in most cases I tested. The procedures there are not the best you will find in the Operations Research world (neither in time nor in objective function results), but they are […]
It was around the time I separated the Python package from the QGIS plugin and started making AequilibraE a more serious software effort with unit tests, continuous integration, and documentation that I decided that I would eventually have to develop a more consistent API for AequilibraE. That evolution, allied TranspoNET (HOW THE HELL HAVE I FAILED […]
It has been a really long time since I released the experimental version of AequilibraE for QGIS 3.X, and since then I haven’t worked really hard on it. Part of this slow down in the development had to do with the fact that I don’t have air condition in my home office, and Brisbane’s summer […]
One of my last blog posts (adding Python packages to QGIS 3 on Windows 10) was pretty simple, but I was pretty sure that something like that would help quite a bit of people that want to integrate more Python packages into their QGIS workflow, particularly for heavier data processing. One of the many packages […]
Let me start by saying that AequilibraE is probably my favorite project, but I have been neglecting it for a while. Just for some perspective, QGIS 3 has had three major releases (3.0, 3.2 & 3.4) and I have not yet released a version of AequilibraE that is compatible with this new platform. That is […]
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 […]