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Fig. 9.8.
Interactive selection. (Upper) Polylines tagged as “Clear” or “Sunny” at
the clicked points are highlighted. (Lower) Polylines tagged as “Rainy” or
“Snowy” at the clicked points are highlighted.
average is higher than temperatures representative of “Clear” and “Sunny.”
There is little sunlight during these periods.
These results show that we can discover interesting local features from
large numbers of polylines and observe the features by interactive
extraction of polylines.
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