JP2003271053A - Map data preparation method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a map data preparation method for displaying a gateway through which people enter and leave in area data composed of closed contours. <P>SOLUTION: In the map data preparation method whereby the area data composed of closed contours are prepared and attribute data corresponding to the area data are stored, display and printed, part of the contour of the area data through which people enter and leave is formed as line data, and then the attribute data of the gateway corresponding to the line data are stored, displayed, and printed. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for creating map data stored in a computer which gives attribute data corresponding to area data.

[0002]

2. Description of the Related Art Conventionally, a map has been used in various ways as a graphic showing information, but it is basically provided with attribute data corresponding to area data in the map. This is a land use status map divided by attributes such as fields, residential areas, factory zones, census area maps divided by survey unit areas, soil maps divided by geology, or by prefectures, municipalities. It is widely used as management data in local governments, educational data in schools, etc., and its use is very wide. Also, once the above map information is stored in the computer, it is relatively easy to update the map information later, and for example, the soil map is displayed in duplicate on the road construction planned area map to check the geological condition in advance. It is relatively easy to use maps that are composed of information of different attributes by overlapping them. There are the following methods for creating area data corresponding to an attribute for each area and storing it in a computer. First, using a digitizer etc., manually move the input terminal along the closed curve (outline) of the area on the map,
The movement data of the input terminal is input to the computer as area data composed of closed curve data, and then attribute data corresponding to the area data is added. Regarding the input of the area data by the digitizer described above, in order to add the attribute data corresponding to each input area data, each area data must form a closed curved surface. If the contour line (closed curve) of the area data is discontinuous even if it is visually closed on the screen display, it is open as data inside the computer, and the attribute given to this area data is Leakage to the surroundings from this discontinuity causes inconvenience. Therefore, the work of inputting the area data by the digitizer described above requires skill and is extremely troublesome. The correction of such a conventional technique is disclosed in JP-A-5-73.
It is the invention described in 659. That is, the invention provides a map information system that automatically creates map information in which attribute data is added to area data, and the configuration of the invention is as follows. That is, "The line data generator is
A map image is automatically read by an image scanner, a digital image signal is generated by a pattern recognition module, line data is created by a line data image processing device, and RAM is created.
Remember. The data converter reads the line data from the line data generator, creates area data, and outputs it to the attribute information creation device. The attribute information creating apparatus performs processing such as complementing discontinuity points of area data, attribute assignment, and printout by the closed area data image processing apparatus based on an instruction input from a keyboard. The RAM stores the completed data. It is the invention of. That is, in summary, after the raster data is automatically created by the computer, the raster data is converted into vector data and the closed vector data is stored in the computer as area data.

[0003]

In the prior art, area data consisting of a closed curve is created on a map and attribute data corresponding to each area data is added, but a person enters and leaves the area data. In this case, no method has been provided so far for creating area data that also indicates from which position people come in and go out. If the area data is relatively small, such as in a private house, you won't feel inconvenient if you don't specify the places where people come in and out of the area data, but the area data has a large area such as a station. In this case, it is very important to clearly indicate where people come in and go out. For example, in the case of a relatively large area, such as a large railway station, where there are many entrances and exits, it is a major need for map users to clearly and clearly indicate where the entrances and exits are. It has become to.
For example, if you are on a train and get off at which platform,
I find it very inconvenient if I don't know the entrance to the station when thinking about which exit is best to go out to my destination. There has been no method for creating such a map that meets the needs of map users. The present invention has been made in view of the conventional circumstances as described above, and the problem to be solved by the present invention is map data that displays entrances and exits of people in and out of area data composed of closed curves. It is to provide a creation method.

[0004]

The present invention, which achieves the above object, is a map data creating method as described below. That is, vector data is created by vectorizing from raster data obtained by reading original maps such as a topographic map, etc. by a manual method using a digitizer, and connecting this vector data to create a closed curve such as a polygon. Area data consisting of. Then, according to the invention of the present application, attribute data corresponding to the closed region data in a one-to-one correspondence is given, and further, a portion of a closed curve of the region data where a person goes in and out is created as line data, and then the line data The feature is that it stores, displays, and prints the attribute data of the entrance / exit corresponding to.
The present inventors distinguish a closed curve of area data such as a polygon, which is a conventional technique, from a portion where a person does not come and go,
The present invention has been made based on the idea of sharply distinguishing and extracting a portion where a person comes in and goes out and a portion where a person comes in and out of a closed curve and displayed the invention. The present invention is specifically the invention described in each of the above claims. In order to clarify the meaning of the terms used in this specification and avoid ambiguity in the content of rights, the present invention will be described after explaining the terms below. [Explanation of terms] ・ In general, the term "Map" refers to a situation in which all or part of the ground surface is depicted on a plane using symbols, characters, colors, etc. With the map in the present invention, for example, by using an automated map creation (AUTOMATED CARTOGRAPHY) method, etc., digitization of results collected and observed by means such as photogrammetry,
A map database (CARTOGRAPHIC DATA) created by automating each process of map creation, such as reading and digitizing figures displayed on the map, and editing, drawing, and duplicating maps based on those numerical information.
BASE).・ What is a map database (CARTOGRAPHIC DATA BASE)?
This refers to data that has been digitized and stored under a fixed format and structure so that it can be updated, deleted, or added at any time. In the present specification, the area data refers to a closed area (two-dimensional surface) surrounded by a closed curve. Area data will be added if closed curve data is added, so
The area data and the closed curve data have a one-to-one correspondence and are synonymous. -A closed curve is an outline of the soldier area, and a curve that follows the curve and returns to its original position. The characteristic of the closed curve is that a closed region can be defined by the closed curve, and it is possible to fill it or provide attribute data corresponding to one to one. The closed curve is stored in the computer as a numerical function with no area,
A program that is visually displayed on the computer screen, such as a thin line and a thick line, is prepared. -Attribute data is data that gives the name of area data. For example, in the case of a residential land, the boundary line of the residential land is given by a closed curve on the map. The name data “residential land” corresponding to the area data synonymous with the closed curve corresponds to the “attribute data” here. -Vector data refers to data in which a figure is defined by the position and orientation of some points. The data size is determined by the number of points that compose it. The data size is basically smaller than the raster data. In vector data representation, generally, it can be represented by a start point and an end point, and a shape is treated as a set of vectors. The case where the start point and the end point coincide with each other means the vector expression of the closed curve. -Raster data is data that is composed of a set of dots in 1-pixel units, and the size of the data changes depending on the number of dots and the number of colors used. Raster data can be said to be a data expression method suitable for multi-tone grayscale images such as photographs. It is generally called a raster type because the surface is formed by the arrangement of pixels. -Polygon is a polygonal plane described by the arrangement of vertices. -Raster vector conversion means conversion of raster data into vector data. The survey map creation support software for AutoCAD2000 / AutoCAD Map2000 is equipped with a raster vector conversion function.
You can convert contour raster data to AutoCAD vector data very quickly. 1: 500/1: 1 on AutoCAD screen
It features a function of automatically drawing map symbols and diagrams in accordance with the regulations for creating large-scale survey maps of 000. In addition, it is an indispensable function for surveying drawings, such as the function of shaping the lines that have been raster vector converted and the function of inputting altitude information for all contour lines. In this way, by converting from raster data to vector data by raster vector conversion, it becomes possible to automatically display the closed curve constituting the area data as a vector by utilizing the above survey mapping support software. The area data surrounded by the closed curve can be efficiently created. In this way, vector data is created by automatically reading the raster vector from the base paper of the map and converting the raster vector. When the start point and the end point of the closed curve match, the vector data is synonymous with the closed curve data.

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. Although a commercial system already exists as a system for automatically creating closed region data, in the present embodiment, vector data is created by a manual method using a digitizer, and the start point and end point are matched. Area data composed of closed curves such as polygons was created. Then, attribute data corresponding to the closed region data is given one-to-one, and a portion of the closed curve of the region data where a person goes in and out is created as line data, and then the attributes of the entrance / exit corresponding to the line data. Data (for example, attribute data such as "doorway") is stored, displayed, and printed. By distinguishing the closed curve of the area data consisting of closed curves such as polygons from the part where people do not enter and leave, and by extracting the part where people come and go from the closed curve, it is relatively wide like a large railway station. It became possible to clearly indicate where there are many entrances and exits, targeting the area and where there are many entrances. For example, area data corresponding to the attribute data “Osaka station” is manually created by a digitizer. Then, the area data (given as closed curve data on the map) and the corresponding attribute data "Osaka station" are added on the computer and stored. Further, of the closed curve data, a portion where a person goes in and out is specified, attribute data "entrance / exit" corresponding to the portion is given on the computer and stored. When used by map users, it is possible to clearly indicate the entrance and exit of Osaka Station by coloring, and by using the logical product search, "Osaka Station" ×
By searching for "entrance / exit", it is possible to display only the part where people come in and go out in bold lines so that they can be seen on the computer screen. This gives, for example,
A big need for map users who find it inconvenient if they don't know the station entrance / exit when they are on the train and think about which platform to get off from, which exit to go out, and which way to get to their destination. It has become possible to respond to.

[0005]

According to the present invention, in the map data creating method for storing / displaying / printing the attribute data corresponding to the area data on the map, the portion of the closed curve of the area data where a person goes in and out is used as the line data. After creating it, by adding the attribute data of the entrance / exit corresponding to the line data, it is possible to clearly indicate from which area on the map the map user should enter / exit, thus providing a convenient map. It has become possible.

[Brief description of drawings]

FIG. 1 is a configuration diagram of map data according to the present invention.

[Explanation of symbols]

1 area data 2 closed curve data Part where 3 people do not come and go Part where four people go in and out 10 area attribute data (closed curve attribute data) 11 Doorway attribute data

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Koichi Matsui             Osaka-ga, 4-1-2 Hirano-cho, Chuo-ku, Osaka-shi             Su Co., Ltd. (72) Inventor Kimiko Takashima             Osaka-ga, 4-1-2 Hirano-cho, Chuo-ku, Osaka-shi             Su Co., Ltd. (72) Inventor Rieko Hase             Osaka-ga, 4-1-2 Hirano-cho, Chuo-ku, Osaka-shi             Su Co., Ltd. F term (reference) 2C032 HB03 HB06 HC24 HC27 HC32

Claims (3)

[Claims] 1. A map data creating method for creating area data composed of a closed curve and storing / displaying / printing attribute data corresponding to the area data, wherein a part of a closed curve of the area data where a person enters and leaves. A map data creation method characterized by creating, as line data, and then storing, displaying, and printing attribute data of an entrance / exit corresponding to the line data. 2. A map data creating method, wherein the area data is a building site or a building. 3. Map data created by the method according to claim 1.