1.Zoom in control button
2.Zoom out control button
3.Geolocation (determines the current location of the user)
4.Initial extend (get the map to the default value state)
1.Draw tool ( allow users to draw polygon or line on the map)
2.Export tool ( allow users to export map data as an image file)
3.Measure tool (allow users to measure distance and area on the map
4.Selection tool (allow users to make rectangular selections over the map)
5.Switch to map navigation (pan and zoom