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.
That footprint is broken down as active and passive data traces; digital exhaust consists of the latter. In contrast with the data that people consciously create, data exhaust is unintentionally generated and people are often unaware of it. Security and privacy software makers struggle with the conflicting goals of marketing and privacy.