1. Weather Mining Hayato Akatsuka

2. Objective Cluster a region which shares similar climate.

3. Input Each weather station in the United States is an input Each station contains more than 50 parameters –i.e. Latitude, Longitude, Elevation, Minimum Temperature, Maximum Temperature, so on…

4. Stations 6000 ~ 19000 Stations

5. Overview output(Image) Input (text file) Station1 2005/01/01 MaxTemp MinTemp Lantitude Longitude Elevation …. Station2 2005/01/01 MaxTemp MinTemp Lantitude Longitude Elevation …. Station3 2005/01/01 MaxTemp MinTemp Lantitude Longitude Elevation ….. Clustering

6. Distance Measure Euclidean Distance If you are interested in some particular parameters, adjust k accordingly

7. About Clustering Day 1(Hierachical Clustering) –This is an initialization Stage. –Pick a number of clusters –Then, Perform Hierarchical Clustering Day 2(Clustering variant) –For each input, cluster with the nearest centroid obtained from the previous day (Day 1 in this case). –Do not update centroid –Repeat until you cluster all the input for Day 2. –Recalculate centroid Day 3 –Repeat Day2 ….

8. Centroid Calculation For same cluster 2 nd Day: 3 rd Day: 4 th Day:

9. Quick Animation Day1Day2

10. Result For simplicity, just use only 1 parameter (TMIN). Number of Clusters = 5

11. Comparison Output Hardiness Zone

12. Conclusion Well… there are not much different between a map I received from January and one from December. Simply making a map out of annual data, instead of daily data, might be better.

13. Reference Hardiness Map http://www.arborday.org/treeinfo/zonelook up.cfm