Development of Tool for Green Vision Ratios Map by Mobile Device

In this study, a tool for the green vision ratios map in streets was developed. We have to show quantitatively how much green there are in streets, when we evaluate the greens in urban areas. In general, the green space ratios is often used, but I think the green vision ratios is suitable to comprehend the distribution of greens in streets. Then you can make the map of the ratios by this tool, and it will help you to know the distributions. This map shows the locational information and the direction in measurement point of the ratios by the icons like arrows. For making the map, this tool uses the GPS and the electromagnetic compass of the device. In this way, you can perform in the device all processing such as calculation of the ratios and making the green vision ratios map quickly and easily. The range for choosing the green areas in this tool was fixed by frequency distribution of the data extracted from the photograph of the real greens. From the result of comparison between this tool and visual inspection, it was confirmed the accuracy that it was sufficient to see the ratios by this tool.