Surrounding information collection system and surrounding information acquisition apparatus

A surrounding information collecting method performed by circuitry, the surrounding information collecting method comprising:

• determining whether a number of stored sets of surrounding information is less than a predetermined number;
• requesting a vehicle to transmit additional surrounding information when the number of stored sets of stored surrounding information is less than the predetermined number, the vehicle acquiring the additional surrounding information having an accuracy greater than a threshold calculated based on accuracy of the stored sets of surrounding information;
• acquiring, from the vehicle, the additional surrounding information when the number of stored sets is determined to be less than the predetermined number
• calculating the threshold using serviceability acquired from reducing, according to an elapsed time from when surrounding information has been acquired by a vehicle, serviceability of the surrounding information determined depending on accuracy of the surrounding information;
• and
• storing the additional surrounding information transmitted from the vehicle in response to the requesting.

A non-transitory recording medium storing a program which, when being executed by one or more processors, causes the one or more processors to:

• determine whether a number of stored sets of surrounding information is less than a predetermined number;
• request a vehicle to transmit additional surrounding information when the number of stored sets of stored surrounding information is less than the predetermined number, the vehicle acquiring the additional surrounding information having an accuracy greater than a threshold calculated based on accuracy of the stored sets of surrounding information;
• acquire, from the vehicle, the additional surrounding information when the number of stored sets is determined to be less than the predetermined number;
• calculate the threshold using serviceability acquired from reducing, according to an elapsed time from when surrounding information has been acquired by a vehicle, serviceability of the surrounding information determined depending on accuracy of the surrounding information;
• and
• store the additional surrounding information transmitted from the vehicle in response to the requesting.