4.2.6. Classification of swimming pools
We used an expert system rule at the scale level of 1 (scale
parameter=10) to extract swimming pools in the study area. The
selected bands for the feature space include a mean of PCA band 2 and
mean of PCA band 3. We found that DN values of the mean of PCA
band 2 that are lower than 15,000 and DN values of mean of PCA band
3 that are lower than 24,000 can effectively identify swimming pools.
We decided to use both options to make sure there is no missing area