OvrMap is the component for setting up the mapping offset from the OVRLand of the content to be published.
After you have imported a map you must align it correctly to the OVRLand by moving and rotating it.
In order to achieve high precision placement, it's very important to adjust the position and rotation offset of the 3D model in relation to the OVRLand. While doing this, please take note that the OVRLand blue arrow (Z-axis) points toward the north.
Once the map has been aligned correctly, you need to click on the Save mapping data button to save the changes, or discard the changes using the Reset Mapping Data button
