Abstract: The present invention evaluates, with high precision, the risk of a landslide disaster. An information processing device 100 is provided with: an estimation unit 110 that estimates a parameter indicating a moisture state of soil of a prescribed site, on the basis of a first piece of data indicating the topography, vegetation or geological features of the site and second piece of data indicating the precipitation amount of the site; a correction formula calculation unit 120 that calculates a correction formula, in regards to a first site that is the site at which a sensor for measuring the parameter is installed, using a parameter measured by the sensor and a first parameter which is the parameter estimated for the first site; and a correction unit 130 that uses the calculated correction formula to correct a second parameter, which is the parameter estimated for a second site, which is a site at which the sensor that measures the parameter is not installed.

Abstract: The route search system of the present invention receives the provision request of the information about route search from a route search terminal. The information included in the provision request from a route search terminal is acquired, calculation processing of the environmental load value of the relevant vehicle and the environmental load value of other vehicle by which it is generated with movement of a relevant vehicle from the acquired information is carried out using an environmental load calculation unit.

Abstract: Disclosed is a travel-time prediction apparatus that is capable of making a mid-term prediction of travel time accurately by combining present conditions and statistical information. The apparatus includes a travel-time transition pattern database storing travel-time transition patterns obtained by statistically processing past time-series data of each road link according to type of data. Upon accepting a travel-time transition pattern corresponding to a specified link and day type from the database, the apparatus calculates conversion parameters of a travel-time transition pattern for which an error between the travel-time transition pattern and a sequentially input travel-time time-series data will be reduced, and then makes a prediction using a prediction function obtained by converting the travel-time transition pattern by the calculated conversion parameters. The calculated predicted value and the conversion parameters are distributed as traffic information.

Abstract: The route search system of the present invention receives the provision request of the information about route search from a route search terminal. The information included in the provision request from a route search terminal is acquired, calculation processing of the environmental load value of the relevant vehicle and the environmental load value of other vehicle by which it is generated with movement of a relevant vehicle from the acquired information is carried out using an environmental load calculation unit.

Abstract: Disclosed is a travel-time prediction apparatus that is capable of making a mid-term prediction of travel time accurately by combining present conditions and statistical information. The apparatus includes a travel-time transition pattern database storing travel-time transition patterns obtained by statistically processing past time-series data of each road link according to type of data. Upon accepting a travel-time transition pattern corresponding to a specified link and day type from the database, the apparatus calculates conversion parameters of a travel-time transition pattern for which an error between the travel-time transition pattern and a sequentially input travel-time time-series data will be reduced, and then makes a prediction using a prediction function obtained by converting the travel-time transition pattern by the calculated conversion parameters. The calculated predicted value and the conversion parameters are distributed as traffic information.