## 2 Materials and Methods
### Results of the Update Accuracy Quality Assurance Control  
The classification accuracy could be confirmed using various spatial data, and as a result, finding an accuracy rate of up to 97.9% (Table 4). This high accuracy is attributable to the visual inspection of spatial data with high spatial resolutions and the classification and boundary checks based on field surveys. However, a large number of occlusion areas, including trees/thickets and gardens in apartment complexes, resulted in lower accuracy of \"artificial grassland\" and \"other barren land\", due to blurred boundaries compared with other classification items.  
\begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline \multicolumn{2}{c}{**Quality Assurance (QA) Items**} & \multicolumn{2}{c}{**Total Number of Polygons**} & \multicolumn{4}{c}{**Type of Errors**} & \multicolumn{1}{c}{**Total Error Rate**} \\ \hline
**Medium-Level Classification** & **High-Level Classification** & **Polyens Classification** & **Non-Classific-** & **Non-Classific-** & **Boun-Dary** & **Other** & **Total Error** & **Error Rate (\%)** \\ \hline \multirow{2}{*}{Residential zone} & Single family dwellings & 8489 (2598) & 22 & - & 10 & - & 32 & 0.38 \\ \cline{2-8}  & Multi-family dwellings & 19,471 (4246) & 16 & - & 8 & - & 24 & 0.12 \\ \hline Industrial zone & Industrial facilities & 2258 & 64 & - & 1 & - & 65 & 2.88 \\ \hline \multirow{3}{*}{Commercial zone} & Commercial and office buildings & 3689 (486) & 70 & - & 3 & - & 73 & 1.98 \\ \cline{2-8}  & Mixed areas & 2876 & 22 & - & 5 & - & 27 & 0.94 \\ \hline \multirow{3}{*}{
\begin{tabular}{c} Cultural, sports, \\ and recreational zone \\ \end{tabular} } & Cultural, sports, and & & & & & & & & \\  & & recreational facilities & 4986 & 58 & - & 11 & - & 69 & 1.38 \\ \hline \multirow{3}{*}{Traffic zones} & Airport & - & - & - & - & - & - & - \\ \cline{2-8}  & Harbor & - & - & - & - & - & - & - \\ \cline{2-8}  & Railways & 2246 & - & - & 3 & - & 3 & 0.13 \\ \cline{2-8}  & Roads & 8781 (1986) & - & - & 12 & - & 12 & 0.14 \\ \cline{2-8}  & Others & 159 & - & - & - & - & - & - \\ \hline \multirow{3}{*}{Public facilities} & Environmental infrastructure & & & & & & & \\  & Educational and & & - & - & - & - & - & - \\ \cline{2-8}  & Administrative facilities & 536 & - & - & - & - & - & - \\ \cline{2-8}  & Other public facilities & 1056 (18) & 23 & - & 38 & - & 61 & 5.78 \\ \hline \multirow{3}{*}{Paddies} & Classified rice paddies & 5865 & 15 & - & 4 & - & 19 & 0.32 \\ \cline{2-8}  & Undassified rice paddies & 7853 & 20 & - & 6 & - & 26 & 0.33 \\ \hline \multirow{3}{*}{Fields} & Classified agricultural fields & & & & & & & \\  & Unclassified agricultural fields & 7784 & 18 & - & 2 & - & 20 & 0.26 \\ \cline{2-8}  & Agricultural facilities & Agricultural facilities & 2532 & - & - & 50 & - & 50 & 1.97 \\ \hline \multirow{3}{*}{Orchards} & Orchards & - & - & - & - & - & - & - \\ \cline{2-8}  & Ranches/ & & - & - & - & - & - & - \\ \cline{2-8}  & Aquafarms & & - & - & - & - & - & - \\ \cline{2-8}  & Other cultivation facilities & Other cultivation facilities & 1267 & - & - & - & - & - & - \\ \hline \multirow{3}{*}{Forests} & Broad-leaved deciduous forests & 9411 & - & - & 16 & - & 16 & 0.17 \\ \cline{2-8}  & Coniferous forests & 9547 & - & - & 10 & - & 10 & 0.10 \\ \cline{2-8}  & Mixed forests & 9473 & - & - & 20 & - & 20 & 0.21 \\ \hline \hline \end{tabular}
\end{table}
Table 4: Error detection table for the detailed landcover map update results.