[7]. Hal ini disebabkan karena Aqua MODIS merupakan program jangka panjang dari NASA (National Aeronautics and Space Administration) untuk mengamati, meneliti dan menganalisa lautan, atmosfir bumi dan interaksi diantara faktor-faktor ini. Namun dalam penelitian pernah yang dilakukan tersebut [1]- [7] tidak disebutkan teknik klasifikasi yang dipakai dalam proses klasifikasi data citra.Dibutuhkan suatu cara klasifikasi pada proses pengolahan data citra satelit agar kandungan informasi yang terdapat dalam tiap piksel data citra dapat dikonversi sesuai dengan objek atau tema yang diinginkan. Dalam penelitian sebelumnya telah dikembangkan suatu jenis klasifikasi yang mengklasifikasi data citra berdasarkan nilai piksel yaitu klasifikasi pohon keputusan [8] yang diaplikasikan dalam pengolahan data citra satelit sebelum munculnya satelit Aqua MODIS [9], [10]. Klasifikasi multi area juga dimungkinkan dengan jenis klasifikasi ini dimana satu rangkaian keputusan dibuat untuk menentukkan label yang benar untuk suatu piksel.

Ambon Bay pollution had become a problem when in 1994, there was an algae bloom, which caused 34 people to get sick, and 3 of them died from eating shellfish that had been contaminated with poison from toxic phytoplankton. Since then, various mass media have reviewed and commented on the quality of the Ambon Bay waters. The highlight of the Ambon Bay pollution occurred when in November 2012, the Director-General of Marine Affairs and Small Islands (KP3K) of the Ministry of Marine Affairs and Fisheries (KKP) at that time, Eko Radiyanto, personally admitted that he was concerned about the pollution that occurred in Ambon Bay. Since then, the program "Kalesang Teluk Ambon or Save Ambon Bay" has been launched. The problem that has arisen is how the condition of the fertility of Ambon Bay since the save ambon Bay program was launched to date. The purpose of this study was to monitor the fertility of the Ambon bay in the last eight years since the Save Ambon bay program was launched. Monitoring was carried out from 2013 to 2020 by utilizing remote sensing technology by processing Aqua Modis satellite image data to determine the value of chlorophyll-a distribution as an indicator of water fertility. The results showed that in the first year of the Ambon Bay save the program, there was an increase in the fertility of Ambon Bay from 0.39 to 0.90 mg / m3, but after that, there was a decrease from year to year except in 2020, fertility increased dramatically from 0.31 to 1.00 mg / m3.