| Land/Water Mask Algorithm Specification | |
The Land/Water Mask Algorithm takes the geographic bounds of the
input product and creates a new product covering the same area. The
output product contains a single band, which indicates if a pixel
is land or water. For each pixel, it contains the fraction of
water; a value of 0.0 indicates land, a value of 100.0 indicates
water, and every value in between indicates a mixed pixel.
Since the base data may exhibit a higher resolution than the input
product, a subsampling ≥1 may be specified. In this case for
each resulting sub-pixel the it is computed if its land or water.
Averaging the sub-pixel gives the fraction of water covered by the
macro-pixel.
There are two auxiliary data sets on which the watermask can be
based.
The high-res dataset is based on data given by SRTM -shapefiles between 60� north and 58� south, and by the GlobCover