This chapter describes specific procedures that should be followed by Long Term Resource Monitoring Program (LTRMP) Field Station staff when preparing for and conducting a photointerpretation project. Procedures are provided for photo and work area preparation, scaling, field verification, and interpretation. The procedures are divided into several steps: 1) photo preparation, 2) scaling photos and determining the minimum mapping unit, 3) work area preparation, 4) field verification, and 5) photointerpretation. Required materials and equipment are listed and the classification is listed and described. Basic conventions to delineation and labeling are described.