make map merging possable

i beleave the the cartography table should have the option to merge 2 maps of the same area say i created 2 level 3 maps and explored 1 way and then explored another section of the same area on the map i should be able to combine those maps together, and no im not talking about combining a map like a map wall dous but i'm talking about combining maps that are in the same area just different sides of it explored that way if i acherdently was exploring and made 2 maps in the same area thinking i was in a different area, i could combine the map so i don't have to go back to map the rest of the area