There are many applications which can take advantage of hyperspectral remote sensing. 1  Atmosphere: water vapor, cloud properties, aerosols. 2  Ecology: chlorophyll, leaf water, cellulose, pigmemts, lignin. 3  Geology: mineral and soil types.  Coastal Waters: chlorophyll, phytoplankton, dissolved organic materials, suspended sediments.
The digital footprint applicable specifically to the World Wide Web is the internet footprint; also known as cyber shadow, electronic footprint, or digital shadow, information is left behind as a result of a user's web-browsing and stored as cookies.
An ecological footprint is a measure of human impact on Earth's ecosystems. It's typically measured in area of wilderness or amount of natural capital consumed each year. A common way of estimating footprint is, the area of wilderness of both land and sea needed to supply resources to a human population; This includes the area of wilderness needed to assimilate human waste. At a global scale, it is used to estimate how rapidly we are depleting natural capital. The Global Footprint Network calculates the global ecological footprint from UN and other data.