The LandXML menu is composed of the following features for the Import
feature:

- LandXML File Path: to specify the file location.
- Available surface: to choose the surface contained in the file.
- Position: to insert the correct base point for the geometry.
- Properties: to choose the correct settings for the geometry that will be create in Revit.
- Create button: to generate the geometry in Revit.
Next:
LandXML Import