A legacy Digital Earth Australia (DEA) product that provides images and data showing where water has been seen in Australia from 1987 to the present. Now known as DEA Water Observations.
The distance from crest to crest, or trough to trough, of an electromagnetic or other wave. The longer the wavelength, the lower the frequency.
These types of services provide a way of delivering geoscience maps and data using established internet protocols developed by the Open Geospatial Consortium.
A global indexing scheme designed for the Landsat Program. It is based on nominal scene centres defined by path and row coordinates. See NASA: World Reference System