Web-GIS development and analysis of land suitability for rice plant using GIS-MCDA method in Batu city

Although Batu City is more famous as a tourism city, agriculture still plays an important role in the economy of Batu City. The most dominant agricultural in the Batu City is the horticultural plants. In addition to horticultural plants, Batu City is also a producer of rice plant. But there are not many areas planted with rice plant in Batu City. In 2013, it was recorded by BPS that the area of paddy field cultivation in Batu City is 8,275,637 m
²
, in Batu sub-district is 1,226,352 m
²
, in Junrejo sub-district is 5,922,992 m
²
, and in Bumiaji sub-district is 1,126,293 m
²
. According to the results of the interviews from the Department of Agriculture and Forestry of Batu City, within one year, the land of rice plant is only planted with rice once or twice that should be done 3 times a year. It is because the farmers do not know the land is actually appropriate or not for rice plant. Department of Agriculture and Forestry of Batu City currently does not yet have data that related to the land is actually appropriate or not for planting rice. The data is required, so it can be used as a reference in managing agricultural land. To get the results of the land suitability, this study will apply the methods of GIS-MCDA (Multi Criteria Decision Analysis), which used 9 criterias (elevation, slope, rainfall, light intensity, temperature, air moisture, type of soil, soil pH, and river) that affect the suitability of the land and the result will be applied in Geographic Information Systems (GIS) based on the web. GIS based on the web (Web-GIS) is built according to the architectural design. Web-GIS architecture consists of 3 layers, i.e. the Client Layer, Service Layer, and Layer Support. With the creation of this Web-GIS, is expected to land suitability analysis result can be visualized better and can provide the information properly and clearly for users. Based on the result of land suitability analysis, this research get four results of land suitability class i.e., S1, S2, S3, and NS. Total area of suitability class of S1 is 739.42 ha with percentage 3.7%, total area of suitability class of S2 is 7375.91 ha with percentage 37%, total area of suitability class of S3 is 3706.20 ha with percentage 18.6%, and total area of suitability class of NS is 8120.02 ha with percentage 40.7%.