JPH0285963A - Unitary managing system for map data and attribute data - Google Patents

Abstract

PURPOSE:To flexibly respond to the addition, the change, and the deletion of map data by performing the unitary management of the map data and attribute data in a data base of table format. CONSTITUTION:The unitary management of the map data 2 and the attribute data 1 is performed by the data base of table format such as a relational data base, etc., and coordinate string data of variable length is managed as the set of tables of fixed length in the map data 2, and also, sequential relation between the tables of fixed length is fetched in data to express the same coordinate string data. Therefore, it is possible to manage a coordinate string such as the map data 2 by fetching the sequential relation between the tables of fixed length in the data of the data base of table format, and the unitary management of the map and the attribute data 2 and 1 can be realized in addition to the management of the attribute data. In such a way, it is possible to respond to the addition, the deletion, and the change of the map data flexibly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a system that handles the shape of an object on a map as coordinate string data and the information possessed by the object as code data.

[Conventional technology]

Figure 2 is an example of a conventional map/attribute data management system.
In the figure, (1) is an attribute data file that stores ledger data about things on a map, and (2) is a map data file that stores shape data about things.

(3) is a storage format for ledger data, and the data is classified by assigning a classification to each item. (3) Medium;
Attribute 1. Attribute 2. Each attribute 3 corresponds to an item of ledger data. f4) and f51 represent the storage format of map data, and (41) indicates the correspondence between an object and the position in the file where the coordinate string data of that object is stored. (5) It stores coordinate strings as shape data of objects.

Next, a method of accessing map data and attribute data will be explained.

Access to map data and attribute data is realized by using the display identifiers of individual figures on the graphic display as shown in FIG.

For example, when referring to the attribute data of a figure picked on a graphic display, the corresponding attribute is retrieved via the display identifier of the picked figure and the string in the attribute data file. Similarly, when referencing coordinate data, the data storage position is obtained through the display identifier of the nine picked figures and the management table in the map data file, and the corresponding coordinate string is thereby extracted.

When referencing across both attribute data and map data, it is done through a link. for example.

When you want to know the location information of an object with specified attribute content,
First, an object with specified attribute content is picked up from the attribute data file, and a coordinate string is extracted from the map data file through the information of the object.

[Problem to be solved by the invention]

Conventional map/attribute data management systems employ two or more separate data management systems for map data and attribute data, so data management software is required for each. In addition, for map data files, coordinate columns may be added, deleted, etc. as the shape of things on the map changes.
Although changes are necessary, these operations cannot be handled flexibly whether the coordinate string data is stored sequentially or directly.

This invention was made to solve the above-mentioned problems, and it is possible to manage attribute data and map data under unified data management, and to flexibly add, delete, and change map data. The purpose is to realize a data management method that can handle this problem.

[Means to solve the problem]

The map data attribute data unified management method according to this invention is as follows:
Map data attribute data is centrally managed using a tabular database such as a relational database, and for map data, variable-length coordinate string data is managed as a collection of fixed-length tuples, and the same coordinate string data is In order to express this, the order relationship between fixed-length tuples is incorporated into the data.

[Effect]

The data management method in this invention makes it possible to manage variable-length coordinate strings such as map data in a tabular database by incorporating the order relationship between fixed-length tuples into the data of the tabular database. , together with the management of attribute data, realizes unified management of maps and attribute data.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, (1) is an example of attribute data storage in a tabular database, and (2) is an example of map data storage in a tabular database. (1
) is an identifier uniquely attached to each thing on the map, and attribute 1. Attribute 2° and Attribute 3 correspond to items of ledger data. On the other hand, in (2), the word is the same as the word of attribute data, and the sub-word is the same as the word of the attribute data, and the sub-word is the order relationship when the coordinate string is divided into fixed lengths for the inner data. For example, regarding map data -
The coordinate string data regarding 1 is stored in 1, 2, and 30 storages from the sub. In (2), the number of records indicates how many records (tuples) the data in the ID consists of, and from this it is possible to know the final number from the sub.

The procedure for accessing attribute data is the same as in the prior art.

For accessing graphical data, the data management functions of tabular databases can be used as is, and the coordinate string data of objects can be immediately retrieved using the key.

Rather, like the conventional technology, the display identifier of the graphic display is used as is.

Also, when inputting map data into a database.

It becomes possible to input record formats stored on magnetic tapes, etc., in almost the same form without any further processing.

Furthermore, 9 tabular database tuples can be added or changed for adding, changing, or deleting map data.

You can deal with this flexibly by deleting it.

In addition, although the above embodiment describes a management method for map data and ledger data regarding things on a map, it may also be replaced with shape data (vector data) and material data (code data) in general blueprints, etc. It is possible.

〔Effect of the invention〕

As described above, according to the present invention, map data.

Since attribute data is configured so that it can be centrally managed in a tabular database, the data management of the tabular database can be used as is when accessing map data, making system construction easy. It also has the effect of being able to flexibly deal with additions, changes, and deletions of map data.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a map/attribute data source management system according to an embodiment of the present invention, (1) shows an attribute data storage method in a tabular format, and (2) shows a map data storage method in a tabular format as well. show. FIG. 2 is a diagram showing a conventional management system, in which (1) is an attribute data file and (2) is a map data file. (3) shows the attribute data storage method, and (4) and (5) show the map data storage method. Note that in the two figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] In a system that has the shape of things on a map as coordinate string data and the ledger data of things as code data, the shape data (map data) and ledger data (attribute data) of things are stored in a tabular database such as a relational database. A map data attribute data source management method characterized by centrally managing map data.