Satellite

Satellite-sourced data may be ideal for your use if you need to cover very large areas (10,000s of acres). However, the greatest limiting factors to satellites are the spatial resolution of the data they produce and cloud interference.

Here are some examples:

https://landsat.usgs.gov/

https://www.digitalglobe.com/about/our-constellation

https://www.planet.com/

https://earth.esa.int/web/guest/missions/esa-operational-eo-missions/sentinel-1