1. INTRODUCTION  
2. OBSERVATIONS  
3. METHODS  
3.1. Spectral Parameter Determinations with APOGEE Net II  
3.2. Estimation of Physical Properties  
3.3. Field Contamination Removal Using Density Based Clustering Methodology  
3.4. Additional Parameter Restrictions  
3.5. Separation of Front and Back Populations in Orion B and Orion OB1  
4. RESULTS  
4.1. Parameter Maps and Distributions  
4.2. Hertzsprung-Russell Diagrams  
4.3. Average Metal Abundance  
5. DISCUSSION  
6. SUMMARY AND FUTURE WORK