1. An apparatus comprising: an unmanned aerial vehicle; an electromagnetic energy sensor system associated with the unmanned aerial vehicle, wherein the electromagnetic energy sensor system is configured to generate information about a forest; and a survey controller configured to: identify a number of locations over the forest in which an information level of the information generated about the forest by the electromagnetic energy sensor system is reduced by an effect of cloud cover, generate a route for the unmanned aerial vehicle to move to the number of locations, and continuously generate the route as changes in cloud cover occur over the forest; wherein the route is based on a current location of a number of clouds and a prediction of movement of the number of clouds.