FIGURE 6. Fuzzy cluster of volcanic ash cloud and meteorological cloud.
We observe from Fig. 6 that the proposed fuzzy clustering remote sensing classification method with neighborhood distance constraint in this paper can basically fuzzy cluster the different types of earth surface information, including volcanic ash cloud and meteorological cloud. The above cluster centers have obvious advantages which help further improve the fuzzy cluster classification of volcanic ash cloud and meteorological cloud.
IV. SANG API VOLCANIC ASH CLOUD CASE ON 30 MAY 2014
A. GENERAL SITUATION OF STUDY AREA
Sangeang Api, a part of the Lesser Sunda Islands, is located in Indonesia and south of the Equator, which is also one of the most active islands in Lesser Sunda Islands. It is known as a volcanic island and began to erupt on 30 May 2014. The enormous volcanic ash - rose to 15–20 km and spread to the continent of Australia by wind (see Fig. 7), subsequently caused most local airports to be closed, and all the flights passed through were canceled.