Heatmap

[ghost]

You wrote in your documentation of the Heatmap plugin on http://rpubs.com/bhaskarvk/leaflet-heat, that it's possible to set the size in meters and used the code

leaflet(df) %>% addProviderTiles(providers$CartoDB.Positron) %>% addHeatmap(lng=~lng, lat=~lat, blur = 20, max = 0.05, radius = 15 )

but in this code the size is changing by zooming in and out which souldn't happen with a radius in meters.

[bhaskarvk]

I will have to look, but for setting the size in meters you've got to use addWebGLHeatMap, because unfortunately the regular heatmap plugin doesn't support that option but the webglheatmap plugin does. Mind you the webglheatmap plugin has performance problems beyond a certain number of points (> 100K I think). See example here http://rpubs.com/bhaskarvk/leaflet-heatmap May be @RCura can chime in, he uses the heatmap functionality quite often and was the expert I worked with when implementing the heatmap functions.