Map digitizing has been done in design work, but originally it should be done in surveying work. And it must be carried out based on the rules of map digitizing in the rules of public surveying work under proper control of precision, but there is not clear specification and technique. In this paper, the concrete specification and technique that the geographical information that is a surveying result on the assumption that it is taken over to the next project process and used again is made as the digital data is propose