# An Approach for a Spatial Data Attribute Similarity Measure Based on Granular Computing Closeness
## 4 Case Study
### Results Analysis
For the other land types with smaller similarity coefficients with the paddy fields in Guangxi, due to the small values of the coefficients, it is not feasible to explain the similarity measurement problem. Guangxi needs to persist in making good use of land and resources policies, fully support the alleviation of poverty, unswervingly adhere to the red line of cultivated land quantity and quality, strictly implement the balance of cultivated land occupation and compensation, vigorously implement land remediation and the upgrading of cultivated land and stimulate the vitality of rural land resources. Woodland refers to natural forests and plantations with a canopy density \(>\)30%, including timber forests, economic forests and shelter forests. Guangxi woodland accounts for 54.9% of the forest land in Guangxi, is a major type of forest land in Guangxi and is mainly distributed in the mountains and hills of Guangxi and north Guangxi. The five land types with the largest similarity coefficient to the woodland type were dryland, high-coverage grassland, paddy field, shrubwood, open forest land and other woodland; the five land types with the smallest similarity coefficient to the woodland type were saline-alkali land, wetland, bare rock, sandy land and sea. The similarity coefficient between woodland, paddy field and dryland in Guangxi was high, which indicates that woodland in Guangxi is located around cultivated land. Because woodland is composed of some economic forests and timber forests, the participation of human social activities is high, and this land type has very similar features to cultivated land in terms of social and economic factors, as well as for natural landform. The five types with low similarity coefficients to woodland were the same as for the paddy fields, and because of the small number of land types, they cannot explain the similarity measurement problem. The similarity coefficients of woodland require that Guangxi insist on giving full play to natural conditions and resource advantages, scientific planning, accurate positioning, highlighting characteristics, implementing comprehensive management of rocky desertification areas and developing precious tree species and characteristic economic forests according to local conditions. Abundant forest resources provide very high ecological and economic value, and would consolidate the role of forestry in promoting and safeguarding Guangxi's economic and social development. Urban land refers to land for large, medium and small cities and built-up areas in the county, and these areas are distributed around the sea and roads, with high population density, high GDP, high night light values and relatively low altitude. The five land types with the largest similarity coefficients to the urban land type were other construction land, dryland, high-coverage grassland, paddy field and river and canal. The five land types with the smallest similarity coefficients to the urban land type were wet land, saline-alkali land, bare rock, sandy land and low-coverage grassland. Other construction land refers to factories, mines, large industrial areas, oil fields, salt fields, quarries and other land, as well as traffic roads, airports and special land, and is very similar to the layout conditions of urban land. Urban land has a high similarity with dryland, high-coverage grassland, and paddy fields, indicating the possibility that Guangxi will be converted from these types of land in future urban expansion. The urban layout itself has the characteristics of rivers and coastal areas, and as such has a high similarity with the river and canal types in terms of a social economy. The land types with small similarity coefficients to urban land use in Guangxi were mainly grassland and shrub. These land types are far away from the city, and the requirements for water sources and natural conditions are not like those for forest land and cultivated land. Therefore, there is a low coefficient of similarity measure in nature, society and economy.