THÈS EE - CESBIO - Université Toulouse III - Paul Sabatier

Chapitre 5. Article 3Figure 9. Rice maps derived from the WSM dataset (left) and APP dataset (right) in An Giangfor season 2 and season 3 in 2007 (same legend as Figure 8).Table 4. Confusion matrix between classes derived from APP and WSM.WSMno rice season 2 season 3 both seasonsno rice 19,57% 11,36% 1,51% 4,48% 36,92%APPseason 2 1,69% 39,45% 0,12% 1,23% 42,49%season 3 0,09% 0,09% 0,03% 0,32% 0,52%both seasons 0,34% 2,69% 0,33% 16,71% 20,07%21,69% 53,58% 1,98% 22,74%The ability of the new mapping method to retrieve planted areas can be tested against thestatistical data given by GSO. As suggested in II.B., the planted areas given for the Summercategory in the statistics has to be compared to the sum of the planted areas retrieved by WSMfor season 2 and season 3 in the inland provinces, and to the planted areas retrieved for season2 in the coastal provinces. The corresponding figures are given in Table 5, and plotted in Fig.10. The two datasets show a very good agreement (R²=0.92) with a root mean square error of26000 ha per province.138