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**Essay — Advantages and disadvantages of drone (UAS/UAV) technology.** **Advantages** - **Cm-level spatial resolution** — far beyond any satellite. - **On-demand scheduling** — fly when *you* need to, under clouds. - **Low cost per flight** vs. piloted aircraft or tasking a satellite. - **Flexible payload** — RGB, multispectral, thermal, LiDAR, hyperspectral. - **Ideal for small AOIs** — field-scale agriculture, construction, infrastructure, wildlife. **Disadvantages** - **Regulatory burden** — US FAA **Part 107** certification; altitude/line-of-sight limits; no-fly zones. - **Weather-limited** — wind, rain, cold batteries. - **Small footprint** — many flights and much stitching needed for regional coverage. - **Battery endurance** — typically 20–40 min per flight. - **Data management** — gigapixel orthomosaics strain storage and processing. - **Privacy & safety** — public and airspace concerns.

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