| 摘要 |
The present invention relates to a system for compensating a numerical map to improve the accuracy of numerical data based on a geographical information system (GIS), more particularly, to a system for updating a numerical map which records three-dimensional position information using a reference point applied to underground facilities. The system can display the three-dimensional position information of the numerical map more accurately, when the numerical map is manufactured using the underground facilities as the reference point, by stably performing the role of the reference point and by detecting, correcting, and updating changes in the reference point. |
