JPH06317648A - Global positioning system device with map information display device - Google Patents

Abstract

PURPOSE:To recognize user's own position visually and sensibly even if the user's own position is on the sea by automatically selecting a suitable map scale for always displaying land map information in a screen simultaneously with the display of the position. CONSTITUTION:A signal from GPS satellite is received in a GPS antenna part 2, and the user's own position 5 is calculated by a main body part 1. If it is judged that land map information 6 can be superposition-displayed in the position 5 by the map scale of the current display screen 3, the position 5 and the information 6 are displayed together in the screen. The information 6 is expanded only by positioning the position in such a manner as to be offset to the left side of the screen 3 so as to improve the visual recognition for the position 5. In order to improve the visual and sensible effect of the information itself, to take the map scale of always putting cities with the population above 100,000 people in the screen 3 is taken as reference for decision. Thus, in the information 6 in the screen 3, city names known to some degree all over the country can be recognized visually.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a global positioning system device equipped with a map information display device using a satellite.

[0002]

2. Description of the Related Art The demand for objectively and accurately knowing one's position, whether on land or on the sea, is increasing due to the rise of personal transportation means (for example, automobiles). With the start of operation of a global positioning system called a global positioning system (hereinafter referred to as GPS), it has become possible to perform global positioning of one's position at an individual level. At this time, it is possible to provide a positioning system in which the own position obtained by GPS can be visually known by displaying the own position on the map information.

Hereinafter, a conventional GPS with a map information display device
The device will be described with reference to FIGS. 4 and 5.

FIG. 4 shows a conventional GP with a map information display device.
5 is an external perspective view of the S device, and FIG. 5 is a diagram schematically showing a state of a display screen when a conventional GPS device with a map information display device is used at sea.

As shown in FIG. 4, a conventional GPS device with a map information display device has a main body portion 7, a GPS antenna portion 8 for receiving signals from GPS satellites, a display screen 9 and an operation portion 10. Is made up of. As shown in FIG. 5, the own position 11 displayed on the display screen 9 is displayed on the display screen 9 when an inappropriate map scale is selected when the own position 11 is off Hayama, Kanagawa prefecture, for example. , The map information 12 of the land portion near Hayama is located at a position not displayed on the screen, and it may happen that only the own position 11 is displayed in the center of the display screen 9 and nothing else is displayed. .

[0006]

As described above, when the GPS device with the map information display device is used on the sea, the own position 11 cannot be visually compared with the map information 12 on the land portion, and the own position 11 can be determined. There is a problem that a display state that cannot be perceptually sensed occurs. Then, it is necessary to manually operate an appropriate map scale in order to dislike the display state and to display the land portion on the display screen 9. Partially reducing or enlarging the map scale with the cursor keys is disclosed in Japanese Patent Laid-Open No. 62-142217. However, there is also a problem that such a trouble is newly required.

The present invention solves the above problems, and an object of the present invention is to automatically select an appropriate map scale that always displays the map information of the land portion on the screen at the same time when displaying its own position. I am trying.

[0008]

In order to achieve the above object, the present invention automatically sets a map scale in order to display the own position information obtained by positioning on the map information on the display screen. I am trying.

[0009]

According to the present invention, in the above-mentioned structure, when the position is on the sea and the map information of the land portion is not included, the map scale is automatically selected and the land portion is always displayed on the initial screen. It was done so.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1, 2 and 3.

FIG. 1 shows a map information display device G of the present invention.
It is a PS device. It is composed of a main body unit 1, a GPS antenna unit 2 for receiving signals from GPS satellites, a display screen 3 for displaying information, and an operation unit 4.

FIG. 2 shows a G with a map information display device of the present invention.
The situation of the display screen 3 of the PS device when its own position is on the sea is shown. For example, when the user's position is off the coast of Hayama, Kanagawa prefecture, the display screen 3, the user's position 5, and the map information 6 of the land portion are shown.

FIG. 3 shows a flowchart of a map scale automatic selection process for displaying the map information 6 of the land portion on the display screen when the own position is on the sea.

The GPS device with a map information display device of the present invention will be described above. First, the GPS antenna unit 2 receives a signal from a GPS satellite, and the main body unit 1 calculates the own position 5. When it is determined that the calculated own position 5 is on the sea in step 20 of the flowchart of FIG. 3, the own position 5 and the map information 6 of the land portion are simultaneously displayed on the display screen 3 in the map scale of the current display screen 3. Whether or not it is displayed will be investigated and determined in the next step 21.

As a result of the investigation and determination in step 21, the map information 6 of the land portion is the current map scale of the display screen 3,
If it is determined that it can be displayed on the own position 5 in a superimposed manner, the execution of the flow chart ends, and as shown in FIG. 2, both the own position 5 and the map information 6 of the land portion are displayed on the display screen 3. Will be.

As a result of the investigation and determination in step 21, the map information 6 of the land portion is the current map scale of the display screen 3,
If it is determined that it cannot be displayed on the own position 5 in an overlapping manner, the execution of the flowchart proceeds to step 22, and step 22 is executed.

In step 22, the map scale of the display screen 3 is expanded by one step from the current map scale, and a wider range is automatically expanded in a direction in which the display screen 3 can be displayed.

The execution result of step 22 is returned to step 21, and it is determined again by checking whether or not the map information 6 of the land portion can be displayed on the own position 5 by the new map scale of the display screen 5. become.

The flowchart of FIG. 3 is completed because the own position 5 and the map information 6 of the land portion can be simultaneously displayed on the display screen 3.

The own position information executed in this way is
For example, if you have your own position 5 off Hayama, Kanagawa, GPS
When the signal from the GPS satellite is received by the antenna unit 2 for the calculation, and the calculation is performed by processing the signal from the received GPS satellite, the flowchart of FIG. 3 is executed, and the map information 6 of the land portion is displayed together with the own position 5. An appropriate map scale that can be displayed on the display screen 3 is selected, and the own position 5 as shown in FIG.
Is located in the center of the display screen 3, and the map information 6 of the land portion is displayed in the upper right corner of the display screen 3.
Will be displayed.

The map information 6 of the land portion is displayed on the same display screen 3 as the own position 5 when the own position 5 is at a position where there is no mark, such as on the sea, so the map information 6 of the land portion is displayed. When displayed on screen 3, map information 6 on land
When there are too few, even if the map information 6 of the land portion, which is about the size of a pea, is displayed in one corner of each corner, it is not easy to objectively recognize the own position 5. In that case, the display screen 3 is eventually operated manually, and the effect of the present invention cannot be exhibited. In order to prevent such a situation, the following reinforcement is possible.

First, instead of always arranging the own position 5 at the center of the display screen 3, for example, the map information 6 of the land portion is used.
Is located on the right side of the display screen 3, the map information 6 of the land portion that can be displayed is widened only by arranging the own position 5 so as to be offset to the left side from the center of the display screen 3. The visual recognition of is more effective.

Next, in order that the map information 6 of the land portion displayed on the display screen 3 itself has a high visual and sensory recognition effect, for example, a city with a population of 100,000 or more is always displayed on the display screen. By setting the map scale included in 3 as the judgment criterion in step 21 of the flowchart in FIG. You will be able to visually recognize the name of the city.

By effectively combining the above two, it is possible to provide a GPS device with a map information display device that can obtain more objective position information of its own position.

[0025]

As is clear from the above description, according to the present invention, when the own position is on the sea, the map information of the land portion can be always displayed on the screen, so that the information other than the own position is the maritime information. Since it does not exist, one's position can be visually recognized from the map information of the land portion.

[Brief description of drawings]

FIG. 1 is a GP with a map information display device according to an embodiment of the present invention.
Perspective view of S device

FIG. 2 is a diagram showing a display screen of the same.

FIG. 3 is a flowchart of screen display according to an embodiment of the present invention.

FIG. 4 is a perspective view of a conventional GPS device with a map information display device.

FIG. 5 is a diagram showing a display screen of the same.

[Explanation of symbols]

 3 Display screen 5 Own position 6 Map information

Claims (1)

[Claims] 1. A positioning system using a satellite,
A global positioning system device with a map information display device that automatically sets the map scale of the display screen in order to display the own position information obtained by positioning on the map information on the display screen.