ROAD SURFACE WATER DEPTH CALCULATION DEVICE
A road surface water depth calculation device includes: an acquisition unit configured to acquire flooding locations at which a vehicle travels and water depth candidates of the flooding locations; an extraction unit configured to extract a plurality of continuous flooding locations from the acquired flooding locations; an altitude acquisition unit configured to acquire altitudes of the extracted flooding locations; an estimation unit configured to calculate a sum of the water depth candidate and the altitude, acquired by the altitude acquisition unit, of each of the extracted flooding locations, and estimate the sum as a water surface altitude which is an altitude of a water surface of each of the extracted flooding locations; and a calculation unit configured to calculate a water depth of the extracted flooding location based on the water surface altitude and the altitude, acquired by the altitude acquisition unit, of each of the extracted flooding locations.
1 . A road surface water depth calculation device, comprising:
an acquisition unit configured to acquire flooding locations at which a vehicle travels and water depth candidates of the flooding locations;
an extraction unit configured to extract a plurality of continuous flooding locations from the acquired flooding locations;
an altitude acquisition unit configured to acquire altitudes of the extracted flooding locations;
an estimation unit configured to calculate a sum of the water depth candidate and the altitude, acquired by the altitude acquisition unit, of each of the extracted flooding locations, and estimate the sum as a water surface altitude which is an altitude of a water surface of each of the extracted flooding locations; and
a calculation unit configured to calculate a water depth of the extracted flooding location based on the water surface altitude and the altitude, acquired by the altitude acquisition unit, of each of the extracted flooding locations.
2 . The road surface water depth calculation device according to claim 1 , wherein
the calculation unit is configured to calculate, as the water depth of the flooding location, a value which is obtained by subtracting the altitude acquired by the altitude acquisition unit from an average of the plurality of the water surface altitudes, a mode value among the plurality of the water surface altitudes, or a median value of the plurality of water surface altitudes.
3 . The road surface water depth calculation device according to claim 1 , wherein
the calculation unit further calculates a maximum water depth among a flooding region including the extracted respective flooding locations and a flooding location thereof, based on a calculation result of the water depth of the flooding location and terrain of the flooding location.