A map collection system comprising a map server device , and an in-vehicle device that is mounted on a measurement vehicle , wherein the map server device includes: - a software distribution unit configured to distribute, to the in-vehicle device , mapping software to generate map data based on measurement data obtained by the measurement vehicle , and - a map data acquisition unit configured to acquire, from the in-vehicle device , the map data generated by the mapping software , and wherein the measurement vehicle includes: - a software acquisition unit configured to acquire the mapping software from the map server device ; - a measurement data acquisition unit configured to acquire the measurement data obtained by the measurement vehicle ; - a map data generation unit configured to generate map data by executing the mapping software by using the acquired measurement data as an input, and - a map data provision unit configured to transmit the generated map data to the map server device ; wherein the map data generation unit executes the mapping software distributed by the software distribution unit ; and wherein the in-vehicle device includes: - a storage unit configured to store the generated map data, and - a map data deletion unit configured to delete the generated map data from the storage unit , when the generated map data is transmitted to the map server device . the map server device includes: - a software distribution unit configured to distribute, to the in-vehicle device , mapping software to generate map data based on measurement data obtained by the measurement vehicle , and - a map data acquisition unit configured to acquire, from the in-vehicle device , the map data generated by the mapping software , - a software distribution unit configured to distribute, to the in-vehicle device , mapping software to generate map data based on measurement data obtained by the measurement vehicle , and - a map data acquisition unit configured to acquire, from the in-vehicle device , the map data generated by the mapping software , and wherein the measurement vehicle includes: - a software acquisition unit configured to acquire the mapping software from the map server device ; - a measurement data acquisition unit configured to acquire the measurement data obtained by the measurement vehicle ; - a map data generation unit configured to generate map data by executing the mapping software by using the acquired measurement data as an input, and - a map data provision unit configured to transmit the generated map data to the map server device ; - a software acquisition unit configured to acquire the mapping software from the map server device ; - a measurement data acquisition unit configured to acquire the measurement data obtained by the measurement vehicle ; - a map data generation unit configured to generate map data by executing the mapping software by using the acquired measurement data as an input, and - a map data provision unit configured to transmit the generated map data to the map server device ; wherein the map data generation unit executes the mapping software distributed by the software distribution unit ; and wherein the in-vehicle device includes: - a storage unit configured to store the generated map data, and - a map data deletion unit configured to delete the generated map data from the storage unit , when the generated map data is transmitted to the map server device . - a storage unit configured to store the generated map data, and - a map data deletion unit configured to delete the generated map data from the storage unit , when the generated map data is transmitted to the map server device . <EOS>