## 3 Study Area and Data
### Research Data Acquisition and Processing
#### 3.2.4 Streetscape Image Data Processing
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Svid** & **Road** & **Building** & **Tree** & **Sky** & **Bus** & **Sidewalk** \\ \hline
37011007140313112009700 & 27.600479 & 21.327877 & 19.700336 & 11.957073 & 3.814697 & 4.408550 \\ \hline
37011007140313112032600 & 28.646755 & 39.389324 & 12.493134 & 4.594326 & 0.020790 & 2.093601 \\ \hline
37011007140313112045500 & 36.336517 & 42.506981 & 2.013302 & 11.781406 & 0.026512 & 2.521706 \\ \hline
37011007140313112153000 & 21.691227 & 45.594501 & 1.884079 & 12.111092 & 0.00000 & 7.178211 \\ \hline
37011007140313113823900 & 27.237415 & 51.236629 & 0.212097 & 3.229713 & 0.012398 & 10.075188 \\ \hline
37011013140704150800500 & 31.939507 & 27.535725 & 11.226654 & 6.665039 & 0.362587 & 1.970863 \\ \hline
37011013140704150802500 & 28.536606 & 40.852642 & 4.955864 & 7.218075 & 0.582981 & 9.016323 \\ \hline
37011013140704152537000 & 25.959492 & 52.578068 & 0.099945 & 5.836773 & 0.000000 & 7.768345 \\ \hline \hline \end{tabular}
\end{table} 
Table 10: Feature share of data elements for semantic segmentation of streetscape images. \begin{table}
\begin{tabular}{c c} \hline \hline
**Property Name** & **Meaning** \\ \hline syid & The “svid” is an integer that uniquely identifies the sampling point. \\ \hline direct & The “direct” attribute is usually used to indicate the location of the angle at which the sample point was taken. \\ \hline road & The “road” attribute is usually used to indicate the percentage of roads in an image. \\ \hline building & The “building” attribute is usually used to represent the percentage of buildings in an image. \\ \hline sky & The “sky” attribute is usually used to represent the percentage of sky in a picture. \\ \hline tree & The “tree” attribute is usually used to represent the percentage of trees in an image. \\ \hline streetlight & The “streetlight” attribute is usually used to represent the percentage of streetlights in an image. \\ \hline \hline \end{tabular}
\end{table} 
Table 8: Semantic segmentation model element feature shared attributes. \begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Svid** & **Direct** & **Road** & **Building** & **Tree** \\ \hline
37011007140313112032600 & Left & 36.90986633 & 25.16593933 & 16.90559387 \\ \hline
37011007140313112032600 & Right & 36.37313843 & 20.44830322 & 12.4294281 \\ \hline
37011007140313112032600 & Front & 13.66424561 & 6.915283203 & 28.41835022 \\ \hline
37011007140313112032600 & Back & 23.45466614 & 32.78198242 & 21.04797363 \\ \hline
37011007140313112045500 & Left & 34.24072266 & 35.12573242 & 7.035064697 \\ \hline
37011007140313112045500 & Right & 33.47587585 & 38.87634277 & 6.537246704 \\ \hline
37011007140313112045500 & Front & 20.10383606 & 66.08657837 & 0 \\ \hline
37011007140313112045500 & Back & 26.7665863 & 17.46864319 & 36.40022278 \\ \hline \hline \end{tabular}
\end{table} 
Table 9: Feature share of some elements of the semantic segmentation model for streetscape images. The number of sampling points distributed in the buffer zone of roadway intersections was counted and the results are shown in Figure 16.