The digitization of analog cadastral maps of Taiwan Provincial areas was completed in the year of 2005. However, it was just to use the digitization work to well keep the shapes of all cadastral lines in each sheet of analog cadastral map at the time of digitization sheet by sheet. The problems that the cadastral lines not match at the adjacent map sheet borders probably due to damage or shrinkage or extension of paper cadastral maps were still not solved along with the finish of digitization. For actively solving the existing problems of the joining of analog cadastral map sheets, NLSC has conducted projects through the work of integration and overlaying digitized analog cadastral maps with urban planning pile maps and 1/1,000 topographic maps.