1. Introduction
2. Survey description
2.1. Instrumentation
2.2. Survey setup
2.3. Scheduling and requirements
2.4. Data processing, products, and dissemination
3. Scientific objectives
3.1. Proper motions of young stars and low-mass objects
3.2. YSO identification and characterization
3.3. Cluster formation and the initial mass function
3.4. 3D maps and motion of the interstellar medium
3.5. Properties of dense cores
3.6. Dust properties and reddening law
4. Summary