JPH0690716B2 - Map information retrieval system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Use of the Invention] The present invention accumulates terrain, buildings, place names, etc. described on a map as map data in a database and makes various search requests for the map and its attribute data. Accordingly, the present invention relates to a map information system for processing and editing maps according to purposes, and particularly to a map information system suitable for residential maps.

[Background of the Invention]

The conventional geographical information system is NEC Technical Report VOL.37 NO.5 / 1984
As described in (P32 to P40), the map data in the map database is provided with information indicating the attribute of each element that makes up the map data, which controls search and management of addition, deletion, and deletion of data. Was being done. However, a method of capturing a plurality of certain elements as one aggregate and giving an attribute to this aggregate has not been adopted.

Consider the case of deleting the data for one building. The building data includes line data indicating an outline, surface data, a character string indicating a building name, and the like, and independent identification information is added to each.

Therefore, in order to delete the data of a certain building, it is necessary to individually delete some of the above data. However, in order to quickly delete and change the map information, it is not preferable to separately perform the processes such as deleting and changing the map data. In addition, since it is difficult to perform centralized management of map elements, it is not suitable for a system such as a residential map that needs to grasp characters and shapes as an integrated map element.

[Object of the Invention]

It is an object of the present invention to, in a map information system, specify a line, a plane or a character of a building displayed on a display, and collectively manage the information such as the line as a group. An object of the present invention is to provide a map information search system that can quickly grasp information and can perform processing such as deletion and change of map information in a unified and prompt manner.

[Outline of Invention]

The present invention reads out and displays necessary map information such as a building, a line of a road or the like, a shape element such as a surface, a character element, or attribute data related to these, from the topographic database upon request of the terminal device. In a map information system having a computer processing device for rewriting map information, etc., shape elements such as lines and planes and their shape elements are identified using unique identification information added to shape elements such as lines and planes. A group of related map information is connected, and the group of shape elements and a character element are connected using unique identification information added to the character element and group identification information added to the group of shape element. , Map information for tracing all the shape elements in the group to which this shape element belongs and the related character elements by tracing the above connection when a certain shape element is specified And wherein the search system.

Example of Invention

An embodiment of the present invention will be described below with reference to FIGS. 1, 2, 3, 4, 5, and 6.

The outline of the map information system is as shown in FIG. 1, in which the graphic terminal 3 is connected to the host computer 1 via the terminal control device 2.
The host computer 1 has a topography database 4 and an attribute database 11.

The host computer 1 reads necessary map information from the terrain database 4 or the attribute database 11 or writes necessary map information to the terrain database 4 or the attribute database 11 according to an instruction from the graphic terminal 3.

The terrain database 4 is provided with an element storage file 5, a character element file 6, a graphic element management file 7, a group management file 8 and a basic item file 9.

The role of each file will be described later.

The terrain database 4 holds map information.
As shown in the figure, it is managed for each district in units of cities, towns, and villages, and further divided into units in the figure. When the graphic terminal 3 is used to issue a command to the host computer 1 for calling a required drawing (for example, the one with the drawing number 100) to the graphic terminal 3, the host computer 1 causes the topographic database 4
The figure with the figure number 100 is searched for and displayed on the display of the graphic terminal 3. Here, it is assumed that the host computer 1 stores that the currently used drawing is the drawing number 100.

As shown in FIG. 3, one figure has a hierarchical structure, and a layer number is attached to each layer. For example, layer number 1 has line information, layer number 2 has surface information,
The layer number 3 has character information, the layer number 4 has boundary information, and the like, and these are arbitrarily combined to form the figure 1. Further, the diagram forming the hierarchical structure is divided into four meshes, each of which is provided with a mesh number, which is useful for positioning.

Next, how the related map information is collectively managed in this system will be described with reference to FIGS. 4 and 5.

First, the process from searching each of the graphic element, character element or attribute data to the basic item record existing in the basic item file 9 for collectively managing related information will be described with reference to FIG.

In the element save file 5, character elements or graphic elements are
As the minimum vector data required for graphic processing such as point, line or surface vector type, coordinate value, angle, length, etc.
It is stored in the form of data blocks. Each vector data has its own pick ID,
As shown in FIG. 6, the pick ID is composed of a layer number, a mesh number, and an in-mesh sequence number, and is sorted by the layer number and the mesh number.

Here, the pick ID is fixed. In the element storage file 5, an ID is assigned to each graphic element so that the graphic element can be accessed immediately when the operator selects the graphic element. However, like a general CAD system, every time it is displayed on a graphic display,
When the ID changes, in the present system to which an embodiment of the map information linking method of the present invention is applied, since the pick ID is converted into a logical key to link the files, the meaning as the link key Will be lost. for that reason,
The pick ID was fixed.

When the pick ID is fixed to each element, deletion of data may cause missing of the pick ID, and addition of data may increase the value of the pick ID. So pick
Set the allowable value of ID to a value 100 times or more the number of normal map data elements, and if it exceeds this value, add it.

When the figure number 100 from the terrain database 4 is displayed on the display of the graphic terminal 3, the data blocks of the character elements and figure elements in the figure number 100 are transferred from the element save file 5 to the main memory 10 of the host computer 1. Data blocks are loaded and expanded on the main memory 10.

Here, the structure of a file and the flow of processing will be described by taking as an example the processing of deleting all data related to the building existing in the terrain database 4 and the attribute database 11 because a certain building has been demolished.

First, a basic item record for collectively managing related information, starting from selecting a graphic element of the building displayed on the display of the graphic terminal 3, for example, a surface formed by the outline of the building using a light pen or the like. The procedure for searching up to is explained.

In the drawing of the drawing number 100 displayed on the display of the graphic terminal 3, select the surface of the building with a light pen or the like,
When a command for deleting all information related to a building is input, a data block corresponding to the surface of the building is searched from the data block group developed on the main memory 10. A pick ID corresponding to the data block of the surface information is attached. Here, the pick ID is converted into a logical key in the order of drawing number, mesh number, layer number, and in-mesh sequence number, as shown in FIG. Since the figure number is stored in the host computer 1 in advance,
This will be attached. The map number is attached to distinguish it from other maps in the terrain database 4.

The pick ID of the graphic element attached to the surface of the building is converted into the logical key of the graphic element. This is called a graphic element logic key. In the present embodiment, the graphic element logical key Ei will be specifically used as an example. Then, in the graphic element management file 7, every graphic element logical key has a graphic element management record to which the management key of the group to which the graphic element belongs is attached in advance. For example, a graphic element management record having a group management key Gi corresponding to the graphic element logical key Ei is set. The group management key is used to identify a group commonly assigned to the data blocks of lines and planes belonging to the building. Then, using the graphic element logical key Ei converted by the pick ID, the corresponding graphic element management record in the graphic element management file 7 is searched to find the group management key Gi corresponding to the graphic element logical key Ei.

Next, in the group management file 8, the group management keys of the groups to which the individual graphic elements belong are attached in advance to the group of the graphic element logical keys corresponding to the individual graphic elements at a rate of one. Further, a group management record to which a basic item key corresponding to the group management key is attached is provided. For example, group management key
The group management record having the basic item key Ki corresponding to Gi is set. The basic item key serves as a key for collectively managing building shape elements, character elements, and attribute data. Then, for example, using the group management key Gi of the graphic element management record,
Search the group management key Gi of the group management record,
The basic item key Ki corresponding to the group management key Gi will be found.

In the basic item file 9, a basic item record having a character element logical key corresponding to the basic item key, a group management key, and an attribute data key is set in advance. Character element logical key is the pick ID of the data information data block
Is converted to a logical key. The attribute data key is a key for connecting with attribute data existing in the attribute database 11. For example, the basic item key Ki of the group management record is used to retrieve the basic item key Ki of the basic item record.

In the elementary item record, the character element logical key, group management key, and attribute data key are managed by the elementary item key, so if you search for the elementary item key, you can use this elementary item key to retrieve the related information. It will be deleted. The procedure for deleting using the basic item key will be described later.

Next, in order to delete all the data related to the building, it starts from selecting the character element displayed on the display of the graphic terminal 3 using a light pen or the like, and is a basic item record for collectively managing related information. The procedure for searching up to is explained.

In the figure with the number 100 displayed on the display of the graphic terminal 3, select the character of the building with a light pen etc. and enter a command to delete all the information related to the building. The data block corresponding to the character of the building is searched from the group of data blocks. In the data block of character element,
A pick ID corresponding to it is attached and converted into a character element logical key Ci, for example, as shown in FIG. Then, in the character element file 6, a character element record having an elementary item key corresponding to the character element logical key is set in advance. For example, the character element logical key Ci converted by the pick ID is used to search for the corresponding character element record in the character element file 6, and the character element logical key Ci is searched.
The basic item key Ki corresponding to will be found. Further, the basic item key Ki of the character element record is used to retrieve the basic item key Ki of the basic item record.

In this way, the group of graphic elements and the character element are collectively managed by the basic item record.

Therefore, the basic item key is used to delete the related information. The procedure for deletion is shown below.

Now, the procedure until all the information related to the building is deleted will be described with reference to FIG.

As described above, according to the command for deleting the related information of the graphic terminal 3, after searching for the corresponding basic item record from the character element or the graphic element, in reverse, from the basic item record, the related graphic element, character element, and Attribute data etc. will be searched and deleted.

In the case of a character element, for example, using the character element logical key Ci corresponding to the basic item key Ki of the basic item record, search for the corresponding character element logical key Ci in the character element record, and select this character element logical key Ci. It will be converted to ID and the data block with the pick ID will be deleted, the related character element in the element save file 5 will be deleted, and the character displayed on the graphic terminal 3 will also be deleted. Become.

In the case of a graphic element, for example, using the group management key Ci corresponding to the basic item key Ki of the basic item record,
The corresponding graphic element logical keys Ei, Ej, etc. are searched for in the group management record, these graphic element logical keys Ei, Ej, etc. are converted to pick IDs, and the data blocks with pick IDs are deleted. , The related graphic elements in the element storage file 5 are deleted, and the lines and surfaces of the display of the graphic terminal 3 are also deleted.

Also in the case of attribute data, for example, using the attribute data key Zi corresponding to the basic item key Ki of the basic item record,
The related attribute data Di in the attribute database 11 will be deleted.

When one of the map information about the building is designated and a command is issued to delete all the related information, the basic item records can be collectively deleted.

Incidentally, in the case of changing the data, the processing is performed in the same procedure.

According to the present embodiment, the pick ID is converted into the logical key, and from the character element or the graphic element to the basic item record, or vice versa, the logical key is converted into the pick ID from the basic item record to the character element or the graphic element. By doing so, the search is promptly performed, so that it is possible to quickly grasp the related data and collectively delete or change the data, thereby providing an effect that a simple system can be provided.

〔The invention's effect〕

According to the present invention, in the map information system, when a line, a face, or a character of a building displayed on the display is designated, the information of the line and the like is collectively managed as a set, so that the related map information Can be grasped quickly and
Further, there is an effect that processing such as deletion and change of map information can be performed quickly in a centralized manner.

[Brief description of drawings]

Fig. 1 is a schematic diagram of the map information system, Fig. 2 is a relational diagram between the area stored in the terrain database and one map,
FIG. 3 is a diagram showing an example of the hierarchical structure of one figure, FIG. 4 is a diagram showing a search procedure from a graphic element or a character element to an elementary item record, and FIG. Figure 6, which shows the search procedure up to the map information,
It is a figure which shows the correspondence of a pick ID and a logical key. 1 …… Host computer, 2 …… Terminal control device, 3 …… Graphic terminal, 4 …… Topographic database, 5 …… Element save file, 6 …… Character element file, 7 …… Graphic element management file, 8 …… Group management file, 9 …… Basic item file, 10 …… Main memory, 11 …… Attribute database.

Front page continuation (72) Inventor Akimitsu Kondo 6-23-15 Minamioi, Shinagawa-ku, Tokyo Inside the Omori Software Factory, Hitachi Ltd. (72) Inventor Kimio Shioda 5030 Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa Incorporated company Hitachi Ltd. software factory (72) Inventor Tatsuzo Uchikawa 6-81 Onoue-cho, Naka-ku, Yokohama-shi, Kanagawa Hitachi Software Engineering Co., Ltd. (56) Reference JP-A-58-146958 A)

Claims (1)

[Claims] 1. A map information retrieval system for retrieving map information having graphic elements and character elements according to a command from a terminal device, wherein a plurality of graphic elements belong to the same group, and the graphic elements are identified on a map. A graphic element logical key is linked to another graphic element logical key belonging to the same group via a group management key for identifying the group, and the group management key identifies a character element related to the group on the map. First storage means for storing a graphic element logical key, a group management key and a character element logical key configured to be linked to the element logical key, and corresponding to each of the graphic element logical key and the character element logical key. First storage means for storing the graphic element and the character element, and a first memory element based on the graphic element logical key of one graphic element designated by the terminal device. The storage means is searched, all the graphic element logical keys in the group to which the specified graphic element belongs and the associated character element logical keys are extracted, and the specified graphic element logical key and the character element logical key are extracted. A map information retrieval system comprising: a second memory means based on the second memory means, and processing means for extracting all graphic elements belonging to the same group and related character elements.