41 oyster cultivation. Based on table 2-2, the data distribution of pearl oyster
cultivation for depth parameter is almost the same for S1, S2, S3 and N classes. Salinity and pH parameters the data distribution is concentrated in S1 class, the
data distribution of brightness and DO parameters is concentrated in N class, while the data distribution for temperature is concentrated in S1 class and S2 class
with the same numbers of data.
4.5.3 Comparative Three Methods
Table 4-6 show comparisons of all method for seaweed and pearl oyster cultivation. Based on two methods: SAW and fuzzy methods for seaweed
cultivation, the majority area of classification belongs to S3 class, where the SAW method produce 79.3 and fuzzy method produce 94.5, while threshold criteria
method produce 100 of N class. SAW method showed that S3 class 79.3 is the biggest area compare to N class 20.7. The spatial polygon map for pearl
oyster cultivation using threshold criteria method belongs to N class 100, but the result using SAW and fuzzy method is different. Both methods showed that
pearl oyster has a big potential to be cultivated in this location. Based on table 4-6 the use of SAW method for pearl oyster cultivated produced 90.4 for S3 class.
The use fuzzy method produced 33.6 for S3 class, 4.9 for S2 class and 61.5 for S1 class.
Table 4-6. The comparative three methods for seaweed and pearl oyster cultivation
Method Principle Seaweed Classification
Pearl Oyster Classification
Com- plexity
N S3 S2 S1
N S3
S2 S1
Threshold Criteria
boolean 100 - -
- 100
- - - low SAW parametric
20.7 79.3
- -
9.6 90.4
- -
moderate Fuzzy
parametric - 94.5 0.4 5.1 - 33.6 4.9 61.5 high
Based on figure 4-1a, 4-2a, 4-6a, and table 4-4, there are 30 point of observations for seaweed cultivation. Validity for all this point of observations in
minimum threshold criteria method is 100 belongs to N class. In SAW method, 88.3 points of observation belong to S3 class and 16.7 belong to N class. In
42 fuzzy method, 10 point of observation in S1 class and 90 belongs to S3 class.
For pearl oyster cultivation based on figure 4-1b, 4-2b, 4-6b, and table 4-5, there are 9 points of observation. In threshold criteria, 100 point of observation
belongs to N class. In SAW and fuzzy methods all points of observation belongs to suitable order, therefore in SAW method 88.9 belong to S3 class and 11.1
belong to N class. In fuzzy method, 44.6 point of observation belongs to S1 class and 55.6 belong to S2 class, as shows in Table 4-7.
Table 4-7. Percentage of observation point in the suitability area
Method Seaweed
Pearl Oyster N S3 S2
S1 N S3 S2 S1
Threshold Criteria
100 - -
- 100 -
- -
Simple Additive Weighting 16.7
88.3 -
- 11.1
88.9 -
- Fuzzy
- 90 - 10 - - 55.6
44.6
43
V. CONCLUSION AND RECOMMENDATION
5.1 Conclusion
