This sample demonstrates how to control the surface placement of a 3D graphic. Graphics can either be placed relative to the elevation surface (RELATIVE), relative to sea level (ABSOLUTE), or draped over the elevation surface (DRAPED).
How it works
Graphics in 3D can be displayed in 3 different surface placement modes: draped, relative, or absolute. Draped mode will display the graphic draped over the scene's surface, regardless of the z-value that is set on the geometry. Relative mode will display the graphic by the associated geometry's z-value, relative to the scene's surface (the ground elevation). Absolute mode will display the graphic by the associated geometry'z absolute z-value, relative to sea level. The surface placement is set on the graphics overlay by setting its
surfacePlacement. All graphics added to the overlay will display using the specified surface placement mode.