This is a new attempt to convey the risk of inundation in a visually easy-to-understand manner amid a series of floods caused by river flooding.
The Ministry of Land, Infrastructure, Transport and Tourism has created a 3D hazard map that reproduces the city in three dimensions, and has begun publishing the inundation assumptions for the 23 wards of Tokyo on the Internet in advance.
This site, named "Plateau," was created by the Ministry of Land, Infrastructure, Transport and Tourism together with a private surveying company, and the buildings and roads are reproduced in 3D on a map.
It is also possible to overlay the estimated inundation area when the river overflows, and some hazard maps of the 23 wards of Tokyo have been released in advance from the 22nd.
Most of the hazard maps published by local governments are flat views, and there was a problem that it was difficult to know where the building would be flooded.
On the other hand, since this site is expressed in 3D, it is easy to understand visually, for example, along the Arakawa River, there is a risk that some buildings will be flooded near the roof.
You can also click on a building for more detailed information, such as the height of the building and the rank of the inundation depth around it.
The Ministry of Land, Infrastructure, Transport and Tourism says, "I want you to use it to make evacuation plans in the event of a flood, such as which building can be used for'vertical evacuation'to move to the upper floors of the building."
3D city model of the site "plateau" is that it is spread across the country about 50 cities in the prospect of the end of the year, used as basic data in the "urban development" of the municipality, not disaster prevention only have been expected.
(Address)
https://www.mlit.go.jp/plateau/