Abstract: The present invention relates to a latest managing system of terminal database DB. The present invention curtails the waiting time for using a map at a terminal by deleting undefined map data from the map data of the terminal data base DB and transmitting defined map number and version number of the host at a predetermined time or according to an instruction from the host to update map data of the terminal data base to the latest map data provided by the host. A plurality of terminals are connected with a host through transmission lines. Map data of the map number other than those defined in the distribution defining file is deleted from the map data of the terminal data base either at the predetermined time or according to an instruction from the host.

Abstract: A design extraction section of a terminal extracts a map in the range instructed by display of the latest facility drawing, generates a unique facility exclusion key from a key value of the facility instructed on the map and a record name of the relevant facility, acquires exclusion by sending such exclusion key to the host through the transmission line and stores the key in the facility exclusion managing DB, updates the facility on the map in the terminal corresponding to the message informing acquisition of exclusion and resets exclusion of the facility exclusion managing DB after sending the updated facility to the host to update the facility DB to be managed uniquely.