Water Observation from Space (WOfS) - statistics

NOTE:

- Geoscience Australia Landsat Collection 2 uses WOFL as input, and the output is DEA Water Observations Statistics (Landsat, DEPRECATED)
- Geoscience Australia Landsat Collection 3 uses DEA Water Observations (Landsat) as input, and the output is DEA Water Observations Statistics (Landsat)

Calculation of clear count, wet count and water summary (percentage of clear observations that are wet).

For each WOfS pixel through time,

1. count the number of clear observations (ie observations not masked by pixel quality for cloud, shadows or sensor issues) to produce clear count dataset;
2. count the number of clear observations that are wet to produce wet count dataset;
3. create the ratio of wet to clear from the wet and clear count datasets and produce as a percentage dataset.