So there is this project I'm working on, which is basically a map view, referencing air quality sensors.
On the screenshot bellow, each marker is a sensor, and each sensor allows to have real time data about air particles coming in.
an example of some referenced air quality sensors - Chrome simulator
What I'd like to achieve, is to obtain a result close to what you can see on this CartoDB map :
example of a pollution map with a colored layer representing pollution density
I'd like to get advices on the best way to create a layer of color, or a mask (I don't know the right name for that) on top of my map, with color fluctuations depending on the pollution particles concentration levels.
I know it's much to ask, but if possible, I'd like to find a solution that is free or at least cheaper than the CartoDB 200$ plan.
I've tried looking for a way to achieve this but haven't had any luck yet.
