# GIS-Based Evaluation Method for Accessibility of Social Infrastructure Facilities
## 4 Results  
### A1  
Table 3 lists the AIs of the dongs in Namdong-gu for social infrastructure facilities that citizens can access by walking. The Namdong-gu AIs were 6.8, 4.2, 4.2, 3.5, 6.0, and 7.1 min for libraries, parks, sports facilities, childcare centers, kindergartens, and \begin{table}
\begin{tabular}{c c c c c} \hline \hline \multirow{2}{*}{**Region**} & \multirow{2}{*}{**Class**} & \multirow{2}{*}{**Facility**} & \multicolumn{2}{c}{**Description**} & \multicolumn{1}{c}{\multirow{2}{*}{**Recommendation**}} \\  & & & & **(min)** \\ \hline \multirow{5}{*}{Town (Walki ng)} & Learning & Library & Public, Private, Small library & 10–15 \\  & Rest & Park & Neighborhood Park & 10–15 \\  & Athletic & Sports facility & Pool, Playground, PE Studio & Less than 10 \\  & Care & Childcare center & Public, Private & Less than 5 \\ \cline{2-5}  & Education & Kindergarten & Public, Private & 5–10 \\  & Elementary school & - & 10–15 \\ \hline \multirow{3}{*}{City (Vehicle)} & Learning & City library & Public & Less than 10 \\  & Rest & City Park & Over 100,000 m\({}^{2}\) & Less than 10 \\ \cline{1-1}  & Athletic & Sports facility & Stadium, Gym, Pool & 15–30 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Travel Time National Recommendation, South Korea. Figure 4: Data flow diagram to find social infrastructure blind spots. elementary schools, respectively. The average AIs were 8.5, 4.3, 5.1, 4.3, 7.2, and 8.4 min for libraries, parks, sports facilities, childcare centers, kindergartens, and elementary schools, respectively. All average AIs were less than 10 min, which demonstrated that accessibility by walking to the social infrastructure facilities in Namdong-gu is generally good. However, the difference between the minimum and maximum values, which were 21.1, 11.2, 25.5, 22.3, 25.8, and 25.6 min, respectively, were considerable. The interesting thing was that the Unveon-dong AIs were the highest for all facility types. This is because most areas in Unveon-dong are mountains, vacant lots, and subway stations and their subsidiary facilities. Except for industrial complexes, few RBs and commercial stores exist; thus, Unveon-dong demonstrated the highest AIs for all types of social infrastructure facilities. In addition, the AIs of Jangsu-dong for libraries, kindergartens, and elementary schools were higher than the average. This is because only 4678 people (0.9%), which accounts for a tiny portion in Namdong-gu, live in Jangsu-dong. In addition, Jangsu-dong has a large public park and sports facilities. Further, private alternative schools are available for children with developmental disabilities. On the other hand, we found that the AIs in Namchon-dong for libraries and Mansu 4-dong for kindergartens were relatively high. Table 4 lists the AIs for social infrastructure facilities that citizens can access by vehicle. The AIs of Namdong-gu were 5.4, 7.0, and 5.2 min for city libraries, city parks, and sports facilities, respectively. The average AIs were 5.6, 7.3, and 5.1 min for city libraries, city parks, and sports facilities, respectively. Similar to the accessibility by walking, all average AIs were found to be reasonable. This result shows that the accessibility by vehicle to social infrastructure facilities in Namdong-gu satisfies national recommendations. Gangeok3-dong demonstrated the lowest AIs of 1.8 min for city libraries, whereas Nonheon2-dong showed the highest AI of 9.8 min. Guwol1-dong residents need 2 min and Gangeok4-dong residents need 17.7 min to access city parks. The differences between the minimum and maximum values were 8, 15.7, and 7.3 min for city libraries, city parks, and sports facilities, respectively.