Layer control and geojson loading

Question

How do make one geojson layer the default layer? I have multiple geojson for different point data. I am using leaflet layer control with radio buttons (so only one dataset is displayed at a time). I am also using the markercluster support plugin, which works great. The problem is when the map loads all of the geojson data is available at the same time until I start switching layers on the control. I am using Objoverlays and baseoverlay in my L.control

Answer 1

Add only the default layer to the map before you add the layer control. Don't add the other layers.