how were aerial photos possible as early as 1860’s in areas where they had no hills or mountains overlooking the city?
In: Technology
Hot air balloons were used in 1870 in the Prussian French war. The Prussians besieged Paris and the only way Parisians had to watch their enemy was from a hot air balloon. They used it for surveillance as well as taking arial photographs.
It’s going to be really hard to stretch this out. But in the 1860’s they had hot air and gas balloons.
Military kites were a thing. By 1893 they were used in the Boer Wars to lift human observers aloft. During the American Civil War they were used perhaps to drop propaganda’
The [French Aerostatic Corps](https://en.wikipedia.org/wiki/French_Aerostatic_Corps) was founded in 1794 to use balloons, primarily for reconnaissance. In 1804 Napoleon appointed [Sophie Blanchard](https://en.wikipedia.org/wiki/Sophie_Blanchard) as Chief Air Minister of Ballooning with a view to using balloons to invade Britain, though Sophie was able to convince him that it was impractical due to unfavourable winds.
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