Overlaying of maps

It would be really good if we can manipulate spatial data, using layers logic, in the Map features. For example, to add polygons of specific regions I have to import a geojson. But I cannot overlap those polygons with lat/long points.

Another feature that I miss is some operations of spatial analysis like Voronoi diagram (Thiessen polygons) to understand the geometry of clusters. This could be very useful when I cluster using k-means, for example.