The present invention provides a system for sharing mapped information between multiple maps, including maps in different media states, in an accurate fashion. The system comprises a transparent overlay for transferring the mapped information, an alignment device for consistently aligning the displayed maps relative to the transparent overlay, and a fastening mechanism for securing the transparent overlay to a mapboard. The system may also include a mapboard, an electronic mapboard, and a computer. The system enables a user to accurately share information added to a map, possibly a digital or paper map, by recording the information onto the transparent overlay. The transparent overlay may then be transferred to a different map, possibly displayed in a different media, where the transparent overlay accurately reflects the recorded information. The use of an alignment device for consistently aligning the displayed maps relative to the transparent overlay, both when the mapped information is being recorded and reflected, ensures the information transferred between the maps is reflected accurately.