# GIS-Based Evaluation Method for Accessibility of Social Infrastructure Facilities
## 4 Results
### RBs with Poor Access to Social Infrastructure  
A spatial query was performed to identify RBs with poor accessibility, considered as social infrastructure blind spots (Figures 5 and 6). As mentioned above, we used the South Korean national recommended travel time. For example, KMoLIT recommended less than 5 min to reach a childcare facility from home. RBs that could reach childcare facilities within 5 min are indicated in white, and those that could not are indicated in black. On the other hand, the national recommendations for elementary schools are 10 to 15 min. Therefore, RBs with a travel time between 10 and 15 min are colored in gray, those less than 10 min in white, and those greater than 15 min in black. Table 5 lists the population for each category in the national recommendations.  
In total, 82% of the population requires less than 10 min to access the library, 13% need between 10 and 15 min, and 5% exceed 15 min. On the other hand, 99.6% of the population has good access, whereas 0.4% in Namdong-gu has poor access to a park by walking. In the cases of childcare facilities and kindergartens, 111,429 people (21%) and 53,061 (10%), respectively, live in childcare service blind spots. Furthermore, 4% of Namdong-gu live in sports facility service blind spots, and 10,612 people (2%) live in spots with poor access to elementary schools.  
Table 6 shows the population and proportion of residents with poor access and good access to the city libraries, city parks, and sports facilities by vehicles. In total, 95% of the population has good access to the city libraries, while 5% has poor access, requiring longer than 15 min to reach a library. In the case of the sports facility, no residents were living in blind spots. Accessibility to the city libraries and sports facilities was found to be excellent. On the other hand, 77% of the population spends within 10 min of travel time to access the city parks, and 23% spend longer than 10 min.  
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Dong** & **Population** & **Population (\%)** & **City Library (min)** & **City Park (min)** & **Sports Facility (min)** \\ \hline Gangeok1 & 23,975 & 4.5 & 3.2 & 12.7 & 5.5 \\ Gangeok2 & 23,856 & 4.5 & 3.9 & 10.2 & 5.1 \\ Gangeok3 & 25,616 & 4.8 & 1.8 & 9.9 & 3.3 \\ Gangeok4 & 26,723 & 5.0 & 7.3 & 17.7 & 6.5 \\ Guwol1 & 32,488 & 6.1 & 5.7 & 2.0 & 5.8 \\ Guwol2 & 38,472 & 7.3 & 4.8 & 5.7 & 6.4 \\ Guwol3 & 27,196 & 5.1 & 4.9 & 6.0 & 8.3 \\ Guwol4 & 16,487 & 3.1 & 4.2 & 2.5 & 3.6 \\ Nonhyeon1 & 33,545 & 6.3 & 6.4 & 4.7 & 5.4 \\ Nonhyeon2 & 32,550 & 6.1 & 9.8 & 3.4 & 6.0 \\ Mansu1 & 16,597 & 3.1 & 7.3 & 4.7 & 4.1 \\ Mansu2 & 25,424 & 4.8 & 4.3 & 9.0 & 5.6 \\ Mansu3 & 18,070 & 3.4 & 3.4 & 6.6 & 6.5 \\ Mansu4 & 23,559 & 4.4 & 6.6 & 9.3 & 2.7 \\ Mansu5 & 16,336 & 3.1 & 4.5 & 4.0 & 4.0 \\ Mansu6 & 26,441 & 5.0 & 7.7 & 9.7 & 2.6 \\ Nonhyeon-gojan & 41,503 & 7.8 & 4.0 & 4.4 & 7.5 \\ Dorim & 9550 & 1.8 & 8.6 & 3.7 & 3.5 \\ Seochang & 54,513 & 10.3 & 5.2 & 6.3 & 4.8 \\ Unyeon & 454 & 0.1 & 6.3 & 9.1 & 6.4 \\ Jangsu & 4678 & 0.9 & 7.0 & 11.6 & 7.1 \\ Namchon & 12,538 & 2.4 & 6.4 & 6.5 & 1.0 \\ Min & 454 & 0.1 & 1.8 & 2.0 & 1.0 \\ Max & 54,513 & 10.3 & 9.8 & 17.7 & 8.3 \\ Average & 24,417 & 4.5 & 5.6 & 7.3 & 5.1 \\ \hline \hline \end{tabular}
\end{table}
Table 4: AI by long—vehicle time.  
Figure 5: Maps of residential areas with poor access—walking time: (**a**) library; (**b**) park; (**c**) sports facility; (**d**) childcare center; (**e**) kindergarten; (**f**) elementary school.  
Figure 6: Maps of residential areas with poor access—vehicle time: (**a**) city library; (**b**) city park; (**c**) sports facility.