FIELD: physics.
SUBSTANCE: navigation device (10, 10') comprises chamber (24) to send video flow from chamber to processor (11). Processor (11) receives video flow from chamber (24), detects displacement of navigation device (10, 10') by identifying certain characteristic elements in one image and tracking said elements in the next image of said flow from chamber with the help of image identification technology, and scrolls displayed cartographic data in response to detected displacement.
EFFECT: possibility to scroll map displayed by navigation device.
17 cl, 10 dwg
