improved performance for canvas creation
improved performance for canvas creation

Packet-Clearing-House/maptable,Packet-Clearing-House/maptable,melalj/maptable,melalj/maptable,melalj/maptable,Packet-Clearing-House/maptable,melalj/maptable,Packet-Clearing-House/maptable,melalj/maptable