I’m trying to understand how I can create a map like this showing the crime rates of each borough of London.
I’ve downloaded the Leafy plugin but I don’t understand how the information is added so it looks like this.
Any suggestions of how this is done would be much appreciated.
Thank you so much!
Hahaha I can’t help you with Leafy. But the physicist in me is impressed with how crimes scale with the square of population density, and hence the rate scales linearly with density. Why? Because crime is a type of interaction and all interaction rates scale with the square of density.
Also have you looked at the Viridis family of colour blind agnostic linear perceptually uniform colour maps, instead of the traditional heat map?
Amcharts would be optimal for this! They have what’s called a cloropleth map
Anatomy of an amchart map
https://www.amcharts.com/docs/v4/chart-types/map/
US map
UK map
And now I looked up a little and saw it would be nice in leaflet too! I’ll kindly step out now! 
@vini_brito do you think that leafy maps would be able to do something like this, so long as the lat/lng boundaries are known as well as the number of crimes per 1000 population for those boundaries?
Thank you so much. I will have a look and see if it works 
Thanks all for the mention! Leafy would need an upgrade for this to be easily done, but with some work, specifically attaining the data and formatting it in the right format, you can use the general purpose “Draw polygon” feature and each borough would be a polygon.
You would need to loop and in each iteration create a polygon with the boundaries of the borough and the “Fill color” would be based on the rate number.
There’s more involved in this logic, but this is a start.
Thank you, Vini. When would that upgrade be ready? I’ve been trying to do what you suggested but nothing is working.
Whenever someone sponsors it 
then depending on my work’s schedule.
If you or someone else would be interested in sponsoring heatmaps in Leafy just send me a private message.
Is there any video or tutorial on how to use this polygon feature?
I’m still trying to make this map work and I’m really struggling.
I now have all the data I need. I just need to know how to upload it into this map.
I was looking at what you have written in Bubble’s forum about Leafy and I’m not making much progress with that information alone.
I’ve got stuck right here in this part:
What do I do to apply my coordinates to the map?
Thank you!
