After my girlfriend and I ran into a guy on the streets who was asking for clothes and something to eat (not that uncommon here in Bogotá), we came to talking about why and how he moved to the capital. Although not admitting this at first, he told us that he used to work as a coca leaf harvester in a small town in the southwest of Colombia, but that he was looking for better job opportunities which he was sure would be available in the capital. It's the typical story of an internal migrant looking for better opportunities, but it left me wondering about how many like him there are in this city.
The Distance Travelled
So, after some looking around on the web I found that the national statistics agency of Colombia (DANE) had published the data of a multi-purpose survey from 2014 in which there was information about internal migration. The first thing, I wanted to know is where most migrants came from. So, I started off with a simple diagram (constructed with d3.js) that shows the distance that most internal migrants travel to get to Bogotá. Not without suprise, most migrants come from relatively nearby departments. Now, as an interesting twist, if you click on the diagram you can see the direction that most migrants come from. In this case, most migrants are from the north of the country, and hardly any are from the southeast.