Navigation apparatus for displaying three-d stored terrain information based on position and attitude
First Claim
1. A navigation apparatus for displaying a three-dimensional terrain image based on a position and attitude of the navigation apparatus, comprises:
- a display unit having a display screen for displaying the three-dimensional terrain image;
a position detection device which detects a current position of the navigation apparatus;
an attitude detection device which detects a current attitude of the navigation apparatus;
a geographic information storage device for storing three-dimensional terrain shape information; and
an image creation unit for obtaining information that characterize a line-of-sight vector perpendicular to the display screen of the display unit, based on attitude information obtained by the attitude detection device, and creating the three-dimensional terrain image from a view point that is located along the line-of-sight vector, based on the current position detected by the position detection device, a line-of-sight defined by the line-of-sight vector, and three-dimensional terrain shape information stored in the geographic information storage device;
wherein,when the attitude of the navigation apparatus is changed, the three-dimensional terrain image is updated according to the change of the attitude; and
when an angle formed between the line-of-sight vector and a gravity vector is equal to or less than a predetermined value, height of the viewpoint of the three-dimensional terrain image for display on the screen is made higher than the height of the current position of the navigation apparatus as detected by position detection device.
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Accused Products
Abstract
A terminal apparatus of the present invention having a position detection unit and a display unit further includes a geographic information storage unit for storing three-dimensional terrain shape information, an attitude detection unit for detecting the attitude of the terminal apparatus, and an image creation unit for obtaining information on a vector vertical to the display unit based on information on the attitude obtained by the attitude detection unit and creating a three-dimensional terrain image at a viewpoint using a current position obtained by the position detection unit, information on a line-of-sight defined by the information on the vector, and the three-dimensional terrain shape information in the geographic information storage unit. When the attitude of the terminal apparatus is changed, the three-dimensional terrain image on the display unit is updated, following a change in the attitude of the terminal apparatus.
68 Citations
2 Claims
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1. A navigation apparatus for displaying a three-dimensional terrain image based on a position and attitude of the navigation apparatus, comprises:
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a display unit having a display screen for displaying the three-dimensional terrain image; a position detection device which detects a current position of the navigation apparatus; an attitude detection device which detects a current attitude of the navigation apparatus; a geographic information storage device for storing three-dimensional terrain shape information; and an image creation unit for obtaining information that characterize a line-of-sight vector perpendicular to the display screen of the display unit, based on attitude information obtained by the attitude detection device, and creating the three-dimensional terrain image from a view point that is located along the line-of-sight vector, based on the current position detected by the position detection device, a line-of-sight defined by the line-of-sight vector, and three-dimensional terrain shape information stored in the geographic information storage device;
wherein,when the attitude of the navigation apparatus is changed, the three-dimensional terrain image is updated according to the change of the attitude; and when an angle formed between the line-of-sight vector and a gravity vector is equal to or less than a predetermined value, height of the viewpoint of the three-dimensional terrain image for display on the screen is made higher than the height of the current position of the navigation apparatus as detected by position detection device. - View Dependent Claims (2)
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Specification