WO1999057520A1 - Autoscaling of recommended route - Google Patents
Autoscaling of recommended route Download PDFInfo
- Publication number
- WO1999057520A1 WO1999057520A1 PCT/US1999/008776 US9908776W WO9957520A1 WO 1999057520 A1 WO1999057520 A1 WO 1999057520A1 US 9908776 W US9908776 W US 9908776W WO 9957520 A1 WO9957520 A1 WO 9957520A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- route
- navigation system
- determining
- display
- vehicle
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
- G01C21/34—Route searching; Route guidance
- G01C21/36—Input/output arrangements for on-board computers
- G01C21/3667—Display of a road map
- G01C21/367—Details, e.g. road map scale, orientation, zooming, illumination, level of detail, scrolling of road map or positioning of current position marker
Definitions
- This present invention relates to navigation systems and more particularly to a navigation system with a vehicle location display for showing a vehicle's current location and the location of the desired route.
- Navigation systems generally provide a recommended route from a starting point to a desired location.
- the starting point and desired location are selected from a large database of roads stored in a mass media storage, such as a CD ROM, which includes the roads in the area to be traveled by the user.
- the navigation system can be located in a personal computer or it can be installed in a vehicle. If the navigation system is installed in a vehicle, the starting point is typically the current position of the vehicle, which can be entered into the navigation system by an associated position determining system that usually includes a Global Positioning System
- the navigation system determines a route from the starting point to the destination utilizing an algorithm well-known to those in the art and currently in use in many navigation systems. Usually there are many potential routes between the selected starting point and the desired destination. Typical navigation systems select a recommended route based upon certain predetermined criteria including the length of the route and the estimated time of travel on the route. Depending upon the predetermined algorithm of the navigation system, the navigation system will recommend the route with the shortest total length, the lowest total time, or some weighted average of length and time.
- the recommended route is then displayed to the user as a map showing the starting point, desired destination and highlighting the recommended route.
- the navigation system displays the current location of the vehicle and provides turn-by-turn instructions to the driver, guiding the driver to the selected destination along the recommended route.
- the typical navigation system provides the current vehicle location to the user by displaying either a textual guidance mode screen having a set of instructions and the current location or a guidance mode map showing the starting point, desired destination, current location and highlighting the recommended route.
- One disadvantage with current displays is that the present location of the vehicle and the starting point of the recommended route may not be able to be seen on the display screen at the same time. This can occur in a situation where the vehicle is moving while the route is being determined and the current position of the vehicle and the nearest point on the recommended route can no longer be in the same screen due to the current display scale. This makes it difficult for the user to proceed to the starting point of the recommended route.
- Some map displays permit the user to select a viewing scale to aid the driver in showing his current position in relation to the starting point of the recommended route, but this requires further input from the user while the user is en route. Accordingly, it is desirable to provide a vehicle location display that automatically scales the display to show a vehicle's current location and the starting point of a recommended route on the same screen.
- this invention provides a vehicle location display for a navigation system.
- the vehicle location display displays the current vehicle location on a display device of a navigation system in a graphical display mode. In the graphical display mode, the display displays a map having the current location of the vehicle.
- the navigation system includes a database of roads and a system for determining the current position of a vehicle in relation to the database. A user can select a desired destination in the database by using an input device connected to the navigation system.
- the navigation system also includes a system for determining a route to the destination.
- a display displays the route and the vehicle's current position by automatically scaling the display to include the route and the current position.
- Figure 1 is a schematic of the navigation system of the present invention
- Figure 2 illustrates an example of a display showing a current location
- Figure 3 illustrates an example of a display showing the present location and a desired route to a predetermined destination.
- the navigation system 20 of the present invention is shown schematically in Figure 1.
- the navigation system 20 includes a central processor unit (CPU) 22 connected to a display 24, such as a high resolution
- the CPU 22 is also connected to an input device 26 such as a mouse, keyboard, key pad, or remote device.
- the display 24 can be a touch screen display.
- the navigation system 20 further includes a storage device 28, such as a hard drive 28 or a CD ROM, connected to the CPU 22.
- the storage device 28 contains a database including a map of all roads in the area to be traveled by the vehicle 32 and may contain the software for the CPU 22, including the graphical user interface, route guidance, operating system, position-determining software, etc.
- the navigation system preferably includes position and motion determining devices, such as a GPS receiver 32, a gyroscope 36, a compass
- the navigation system 20 determines the position of the vehicle 32 relative to the database of roads utilizing the position and motion determining devices.
- the driver selects a destination relative to the database of roads utilizing the user input device 26 and the display 24.
- the navigation system 20 displays turn-by-turn instructions to the driver to guide the driver to the desired destination from the present position.
- the navigation system 20 is determining or calculating a route while the vehicle 32 is moving.
- the current location of the vehicle 32 may not be near the recommended starting point of the route, such as when the vehicle is in a parking lot, on a new street, or on a small side street that is not included in the database of roads, for example.
- the recommended starting point of the route may be at a point that the vehicle has already passed.
- the display 24 displays a map showing the recommended route and the current vehicle position on the map.
- the display 24 also includes an instruction instructing the driver to proceed to the route. Since the vehicle 32 may have been moving while the route was being calculated, the current position of the vehicle and the nearest point on the recommended route may no longer be in the same screen, depending upon the current display scale, as shown in Figure 2.
- Figure 2 shows a vehicle's current position, indicated by the arrow, on a map scale that does not show the starting point of the recommended route.
- the display 24 automatically scales the display of the map, as shown in Figure 3, so that the nearest point on a recommended route and the current position of the vehicle 32 are both shown on the display 24.
- Figure 3 shows the display 24 when the navigation system 20 has automatically scaled the display 24 to simultaneously show the vehicle's current position and the starting point of the recommended route.
- the current position of the vehicle is represented by the arrow and the recommended route is shown as highlighted with a thicker line.
- There is also a current street field 42 which displays the name of the street on which the vehicle is currently positioned.
- the navigation system 20 also determines a distance from the current position to the nearest point on the recommended route and displays this distance on the display 24 so the driver knows how far he is from the starting point of the route.
- This distance can be communicated to the driver by either or all of the following ways: by a textual display, by an audible indication, or by a graphical display.
- the display 24 could have a distance field 44 displaying how far the vehicle 32 is from the recommended route, as shown in Figure 3.
- the navigation system 20 is often calculating the route while the vehicle 32 is moving. In this situation, the navigation system 20 first determines the current position of the vehicle with respect to the database of roads. Once the recommended route has been calculated, the navigation system 20 then determines a second position, i.e. the new current position, of the vehicle with respect to the database of roads because the vehicle has changed its location since the first position, i.e. the original current position, was determined. The display is then automatically scaled to show the new current position of the vehicle and the nearest point of the recommended route. Thus, the navigation system 20 is determining the route based on the first or original position of the vehicle when the destination was selected and is automatically scaling the display to show both the nearest point of the recommended route and the second or new current position of the vehicle.
- the navigation system determines the distance from the second or new current vehicle position to the route and displays this distance in the distance field 44 on the display 24.
- the first or original position of the vehicle when the destination was selected is shown as a dashed circle while the second or new current position is shown as the arrow.
- the dashed circle is not typically part of the display 24 but is only used to illustrate that the vehicle has changed its location from when the destination was originally selected and when the navigation system 20 has completed calculating the route. If the vehicle is moving when the route is calculated, the display 24 may have to be automatically scaled again after the initial display of the route. If the vehicle is moving away from the route, it may be necessary to zoom out after the initial display of the route in order to maintain the route on the display. Similarly, if the vehicle is moving toward the route after the initial display of the route, the display may zoom in to display the current location of the vehicle and the route.
- the inventive method for automatically scaling the display 24 for the navigation system 20 includes the following steps: (a) determining a first position relative to a database of roads; (b) selecting a destination in the database; (c) calculating a route to the destination in the database; (d) calculating a map scale including the route and the first position; and (e) displaying the route and the first position based on the map scale.
- a first map scale is displayed prior to step (e) and a second map scale, different from the first map scale, is displayed during step
- the method includes the steps of determining a second position relative to the database, the second position being different than the first position, and calculating the map scale based on the second position.
- the first position is the location of the vehicle when the destination is selected and the second position is the location of the vehicle once the navigation system
- the method includes the step of determining a distance from the first position to the nearest point on the route when the vehicle is stationary or determining a distance from the second position to the nearest point on the -7-
- This distance is also displayed on the display 24 along with the vehicle's current position and the nearest point of the recommended route.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT99919953T ATE252221T1 (en) | 1998-05-05 | 1999-04-21 | AUTOSCALING A RECOMMENDED ROUTE |
AU37552/99A AU3755299A (en) | 1998-05-05 | 1999-04-21 | Autoscaling of recommended route |
DE69912116T DE69912116T2 (en) | 1998-05-05 | 1999-04-21 | AUTO SCALING OF A RECOMMENDED ROUTE |
EP99919953A EP1078224B1 (en) | 1998-05-05 | 1999-04-21 | Autoscaling of recommended route |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US8422898P | 1998-05-05 | 1998-05-05 | |
US60/084,228 | 1998-05-05 | ||
US09/099,963 US6574551B1 (en) | 1998-05-05 | 1998-06-19 | Autoscaling of recommended route |
US09/099,963 | 1998-06-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999057520A1 true WO1999057520A1 (en) | 1999-11-11 |
Family
ID=26770726
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1999/008776 WO1999057520A1 (en) | 1998-05-05 | 1999-04-21 | Autoscaling of recommended route |
Country Status (6)
Country | Link |
---|---|
US (1) | US6574551B1 (en) |
EP (1) | EP1078224B1 (en) |
AT (1) | ATE252221T1 (en) |
AU (1) | AU3755299A (en) |
DE (1) | DE69912116T2 (en) |
WO (1) | WO1999057520A1 (en) |
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-
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- 1999-04-21 DE DE69912116T patent/DE69912116T2/en not_active Expired - Lifetime
- 1999-04-21 AT AT99919953T patent/ATE252221T1/en not_active IP Right Cessation
- 1999-04-21 WO PCT/US1999/008776 patent/WO1999057520A1/en active IP Right Grant
- 1999-04-21 AU AU37552/99A patent/AU3755299A/en not_active Abandoned
- 1999-04-21 EP EP99919953A patent/EP1078224B1/en not_active Expired - Lifetime
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Also Published As
Publication number | Publication date |
---|---|
EP1078224A1 (en) | 2001-02-28 |
US6574551B1 (en) | 2003-06-03 |
DE69912116D1 (en) | 2003-11-20 |
AU3755299A (en) | 1999-11-23 |
ATE252221T1 (en) | 2003-11-15 |
DE69912116T2 (en) | 2004-07-22 |
EP1078224B1 (en) | 2003-10-15 |
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