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**Aerial photography on film — advantages and disadvantages.** **Advantages** - **High ground resolution** (a frame of aerial film can resolve very fine detail). - **Flexibility** — mission-on-demand, varied altitude/lens combinations. - **High geometric reliability** — a stable imaging plane + known lens geometry. - **Relatively inexpensive** vs. satellite tasking. **Disadvantages** - **Daylight only** — typical acceptable window is **10:00 AM – 2:00 PM** local (for good sun angles). - **Poorer contrast at shorter wavelengths** (blue scatters in the atmosphere). - **Film is non-reusable**, expensive to process, storage-heavy. - **Inconvenient** — must fly, land, develop, scan. - **Inefficient for digital analysis** — has to be digitized before any modern GIS/classification work.

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