This document discusses factors that should be considered when planning and selecting sites for airports. It notes that airports must be able to handle different types of aircraft and have proper facilities. When selecting a site, planning studies should consider meteorological conditions, available land for expansion, availability of utilities, surrounding development, construction costs, and obstructions. Key factors include wind patterns, visibility, noise impacts, and ensuring sufficient clear air space. Proper planning is essential for developing infrastructure to support modern air travel needs.