The product of the water occurrence mask is created in the processing of the surface area time series. It is used for filling of remaining data gaps caused by voids, clouds or snow. However, it can also provide important information for hydrological applications since it contains information about water occurrence of a lake or reservoir since the 1980s. An exemplary water occurrence mask is shown for Ray Roberts Lake in the right figure.
This product is estimated within the processing strategry of surface areas for lakes and reservoirs. Therefore, more information can be found here.
DAHITI currently provides 193 water occurrence masks distributed over all continents, except Antarctica. In Africa (12 time series), Asia (8), Australia (1), Europe (5), North America (159), and South America (7) water occurrence masks are available. The water occurrence masks in DAHITI are freely available and can be downloaded after a short registration process. The amount of water occurrence masks is permanently increasing.
This product is processed in the processing chain of surface areas.
More information can be found here.
The water occurrence mask is stored as GeoTiff. The spatial resolution is 0.0001° which is about 10m.
Description of pixel values:
|0 - 100||Percentage of Water Occurrance|