The present invention relates to a portable navigation terminal, and more particularly, to construct land, sea, and mountain climbing electronic maps, and to automatically enter land, sea, and mountain climbing navigation modes by using a user's position coordinates and area received from a GPS receiver. The present invention relates to a navigation terminal system having a mode conversion function to a land, a sea, and a mountain climbing electronic map, which enables manual switching so that a navigation system can receive not only land but also a sea or a mountain climbing guidance area as a navigation system.;In order to achieve the above object, a navigation terminal system having a mode conversion function for land, sea, and mountaineering electronic maps according to the present invention includes a location information detection unit for receiving current location information of a user; At least two or more of an on-site electronic map database having map information of a land area, a climbing electronic map database having a map information of a mountain area, or a marine electronic map database having a map information of a sea area Map storage unit; The current coordinates and area of the user are detected using the location information received by the location information detection unit, and the electronic map storage unit reads any electronic map database matching the detected location coordinates and area from the electronic map storage unit. A mode conversion unit for automatically converting a mode of the map database; And a central controller configured to service at least one of land, sea, and mountain climbing by executing an operation program corresponding thereto to drive the digital map database converted by the mode converter and displaying the same. It is set as the characteristic structure.;Mode conversion, land, sea, mountain climbing, mountain, GPS, navigation system, CPS, leisure, electronic map, DB, Navigation System
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