紧急应变
Accidental spills of toxic material, wildfires and natural disasters require immediate action. HytecAltoAmericas’ imagery supplies near real-time information regarding the location and extent of the impact. The consequences of such catastrophic events can also be evaluated using remote sensing.
A population density map records population estimates that are not obtained directly, but are inferred by various methods. Dwelling-unit estimates are most useful in rural areas and third world countries. Land use and area density estimates are also used. In large cities, built-up techniques can be utilized.