JPH01211074A - Map retrieving device - Google Patents

Abstract

PURPOSE:To realize the superposition of fixed map information and highly variable information for display on a screen by storing the highly variable information in a 2nd storing means which is rewritable and reading out the contents of the 1st and 2nd storing means to display these contents as a synthetic picture. CONSTITUTION:The map retrieving device is provided with an optical disk 4 which serves as a 1st storing means which stores the fixed map information undergone the compressed coding, an image processor 3 which serves as a means which reads out the contents of the device 4 to apply the coding and expansion to said contents for the picture processing, a keyboard 5 connected to the processor 3, a monitor 1 serving as a means which displays the output of the processor 3. While a magnetic disk device 2 serves as a rewritable 2nd storing means stores the highly variable information. The contents of both devices 2 and 4 are read out to the processor 3 with operation of the keyboard 5 and given to the monitor 1 as a synthetic picture. In such a way, the fixed map information and the highly variable information can be put on each other and displayed on a screen.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention is applied to a map search device that accumulates and displays map image information. In particular, the present invention relates to a map search device that simultaneously handles portions of a map that are subject to few changes and portions of additional information such as road construction displays that are subject to frequent changes.

〔overview〕

The present invention provides a map search device in which information such as map information that does not change much and has a large amount of data is stored in a first storage means that cannot be rewritten, and information that does not change much and has a small amount of data such as display during road construction. Information is stored in a rewritable second storage means, and information from the first storage means and second storage means is combined and displayed, allowing fixed map information and information that changes frequently to be combined. This allows them to be displayed overlappingly on one screen.

[Conventional technology]

Conventionally, map search devices have a large amount of information, so all the information is written on a map, the map is input using a scanner, and the input image information is data compressed and encoded and stored in an optical disk device.

[Problem that the invention seeks to solve]

However, such conventional map search devices store all information on optical disk devices, so they cannot handle frequently changing displays during road construction or real-time location information of fire engines. In other words, since optical disk devices cannot be rewritten, if road construction indications are written on a map and stored in the optical disk device, the optical disk medium will quickly become destroyed, or data such as location information of fire engines, etc. There was a drawback that real-time information could not be stored in optical disk devices.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks and provide a map search device that allows fixed map information and frequently changing information to be superimposed on one screen.

[Means for solving problems]

The present invention provides a first storage means for storing compressed and encoded fixed map information, a means for reading and decoding and decompressing the contents of the first storage means and performing image processing, and a means for performing the image processing. The map search device is equipped with a rewritable second storage means for storing frequently changed information, and the means for performing the image processing is configured to match the contents of the second storage means. The image forming apparatus is characterized in that it includes means for reading out the contents of the first storage means and providing it to the displaying means as a composite image.

[Effect]

Information that is frequently changed is stored in a rewritable second storage means. The providing means reads the contents of the second storage means and the contents of the first storage means and provides them to the means for displaying as a composite image for display. The above operations allow fixed map information and frequently changing information to be displayed overlappingly on one screen.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a map search device according to an embodiment of the present invention. In FIG. 1, the map search device includes an optical disk device 4, which is a first storage means for storing compressed and encoded fixed map information, and an optical disk device 4, which reads out the contents of the optical disk device 4, decodes and expands them, and performs image processing. The image processing apparatus includes an image processor 3 as a means for performing image processing, a keyboard 5 connected to the image processor 3, and a monitor 1 as a means for displaying the output of the image processor 3.

Here, the feature of the present invention is that it is equipped with a magnetic disk device 2 which is a rewritable second storage means for storing information that frequently changes, and the image processor 3 is provided with a magnetic disk device 2 which is a rewritable second storage means for storing frequently changed information. It includes means for reading out the contents and the contents of the optical disk device 4 and presenting them to the monitor 1 as a composite image.

The operation of the map search device having such a configuration will be explained. FIG. 2 is a diagram showing the relationship between map information and vector information of the map search device of the present invention. FIG. 1 shows an example in which a magnetic disk group f2 is used as a rewritable storage means and an optical disk device 4 is used as a non-rewritable storage means. In FIG. 1, map information is stored in an optical disk device 4 in the form of disk compression and encoding, and information such as road construction is stored in a magnetic disk device as vector information.

FIG. 2 is a diagram showing the relationship between the map information stored in the optical disk device 4 shown in FIG. 1 and the vector information stored in the magnetic disk device 2.

2nd r! ! In J, map information is partial images Ar, A
The data is compressed and encoded in units of a, B, SB, . . . and stored on an optical disc. The position of partial image B3 is the distance X1 from the lower left of the partial image to the origin.
Represented by syl. Further, vector information is represented by distances X2 and y2 from the origin.

In FIG. 1, the image processor 3 reads map information compressed and encoded from the optical disk device 4 according to address information input from the keyboard 5, decodes it, and writes it into the image memory in the image processor 3. . At the same time, vector information of the area corresponding to the partial image of the map information is read from the magnetic disk device 2, and the result is combined with the map information on the image memory.
Displayed on monitor 1. At this time, the map information and vector information are combined in the form shown in FIG.

〔Effect of the invention〕

As explained above, the present invention has the excellent effect of being able to display fixed map information and frequently changing information in a superimposed manner on a single screen.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a map search device according to an embodiment of the present invention. FIG. 2 is a diagram showing the relationship between map information and vector information of the map search device of the present invention. 1...Monitor, 2...Magnetic disk device, 3...
Image processor, 4... Optical disk device, 5...
・Keyboard, A+ -As, B+ ~B,
,C, ~C6,D, ~D, ,E, -E, .
- Partial image, X1%X2...Distance in the X direction to the origin, yl, y2...Distance in the Y direction to the origin.

Claims (1)

[Scope of Claims] 1. A first storage means for storing compressed and encoded fixed map information; means for reading and decoding and decompressing the contents of this first storage means and performing image processing; and this image. A map retrieval device comprising a means for displaying the output of the means for performing the processing, further comprising a second rewritable storage means for storing frequently changed information, and the means for performing the image processing is arranged in the second storage means for storing frequently changed information. A map retrieval device characterized by comprising means for reading out the contents of the means and the contents of the first storage means and providing them as a composite image to the displaying means.