Land Desktop Companion 2009 is a legacy civil engineering software. It was originally bundled with AutoCAD Civil 3D 2009 to help users transition from the older Land Desktop platform to the newer Civil 3D environment.
Land Desktop Companion 2009 was designed for Windows XP and Windows Vista. It does not natively support Windows 10 or Windows 11.
You should exercise extreme caution when using these sites for several reasons:
A popular alternative that runs on top of AutoCAD or IntelliCAD and retains a workflow very similar to the old Land Desktop styles.