Inundation damage determination device, inundation damage determination method, and program

An inundation damage determination device comprising:

• a memory that stores a command to be executed by a processor;
• and
• the processor that executes the command stored in the memory,
• wherein the processor is configured to:
• acquire an image including a water surface;
• detect a reference object, which is a reference for a height, from the image;
• acquire a total length and a position of the reference object;
• measure a length above the water surface of the reference object in the image and measure a water level of the water surface from a difference between the total length of the reference object and the length above the water surface of the reference object;
• store, as water level history data, the measured water level of the water surface and the position of the reference object in association with each other;
• acquire a position of a house which is a target of an inundation damage determination;
• search for the water level history data within a certain distance from the position of the house;
• in a case where the water level history data within the certain distance from the position of the house is not found, terminate the inundation damage determination;
• and
• in a case where the water level history data within the certain distance from the position of the house is found, decide an inundation water level of the house from the found water level history data and determine a degree of damage of the house from the inundation water level;
• and
• wherein the processor is configured to, in a case in which a boundary between the reference object and the water surface is not shown in the image, measure a water level of the water surface at the reference object by using a depth map.