JPH11242430A - Generating method and updating method for electronic map - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a generating method and updating method for electronic maps which can generate the electronic maps of all domestic areas, enable a user to easily discriminate house names by arranging the house names to maximum sizes according to individual house frame sizes, and update graphic information and attribute information independently and asynchronously. SOLUTION: After distortion correction, respective image figures obtained by reading survey results 7 of country basic figures, city plan figures, road ledger figures, etc., through a scanner device 8 are put one over another successively by converting their coordinate values into a common coordinate system 12. The ground object with the highest precision is selected out of common ground objects among the survey results, difference ground objects are added, and border drawings are successively connected to generate image maps and vector maps in an electronic map geographic information file 15. This geographic information file 15 makes it possible to update graphic information and attribute information independently and asynchronously by generating link information consisting of coordinate information and generation day/time information on the information by using the attribute information as key information so as to specify the positions of the graphic information.

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 and updating an electronic map, and more particularly to a method for independently creating and updating figures and attribute information, which are constituent elements of an electronic map, and sharing the electronic map. , And methods for creating and providing it as general purpose.

[0002]

2. Description of the Related Art Conventionally, in the creation of an electronic map,
Since the map was created for each type of map, the geographical range to be created was limited. In addition, even in the map defined by the survey method as the original map, since the map having a scale of 1/10000 or less does not cover the whole area in Japan, the range in which an electronic map is created is limited.

When a created electronic map is created with link information for linking a figure (eg, a house) to be geometrically expressed with attribute information (eg, a house name) as a figure number (eg, an ID for specifying the figure). In many cases, existing geographic information systems possess system-specific processing information in electronic map data.

In such a case, it is necessary to always update the link information of the attribute information every time the graphic is updated. In such electronic map information, information relating to position information of an external system (for example, customer information which is individually managed by each company based on position information not owned by the originating electronic map) is displayed on the electronic map. Often, this information is re-linked to represent it.

[0005]

For example, when the location of a house or telephone equipment is grasped using an electronic map, an electronic map of the whole country is often required. In particular, in the position representation of continuously connected cable equipment, an electronic map that is continuously connected to the whole area of Japan is required, but in the case of the independent digitization of individual survey results as in the above-mentioned conventional electronic map creation,
There was a problem that such an electronic map could not be created.

Further, since the house name is not described on the electronic map obtained from the survey result, the user individually instructs the customer information owned by the company in the house frame and writes the house name. There was a problem that it was necessary to make it.

[0007] When managing customer information and facility information owned by a company on an electronic map, since figures and attributes are not independent in a conventionally provided electronic map, when a figure is added, updated, or deleted. Attributes also needed to be constantly updated. For this reason, it is necessary to update the electronic map with the update of customer information that is updated in chronological order, and the inconvenience that information related to location must always be imported into a system that processes map information and processed. there were.

Therefore, according to the present invention, it is possible to continuously create an electronic map connected to the whole area of Japan, place a house name in the maximum character size according to the size of each house frame, and allow the user to use the house name. An electronic map can be created so that names can be easily identified. Graphic information and attribute information of the electronic map are independent,
An object of the present invention is to provide a method for creating and updating an electronic map that can be updated asynchronously.

[0009]

In order to solve the above-mentioned problems, an electronic map creation method according to the present invention is a method for creating an electronic map of the whole area of the country, which is based on a work rule defined by a survey method. Prepare the prepared land survey map, national land base map, city planning map, road ledger map, forest basic map and similar prescribed maps, read the prepared drawings with a scanner device, and read each of the read drawings. Correcting the rotation of the drawing and the distortion of the range frame with the geodetic coordinates of the surveying accuracy with respect to the map in the surveying range of the image diagram, converting the coordinates displayed by the corrected drawings to the same surveying coordinate value, The converted drawings are continuously superimposed on the same origin, the superimposed difference feature of each surveyed result is added, and the common feature is the most accurate feature of the electronic map. And select Characterized by constructing the image maps and vector maps as a map.

The present invention also provides a method for creating position information for determining a geographical position held by an electronic map, wherein link information between graphic information, which is configuration information of the electronic map, and related attribute information is stored. Key information (information such as an address, a postal code, a telephone number, a building name, etc.) which specifies the position of the graphic information or originates from the position, and coordinate information (x,
y coordinate, height z coordinate, true north inclination of the coordinate, coordinate scale, origin number of the coordinate system, etc.) and creation date and time information of these information, and link information including these separated information is separated. It is created as unique coordinate information independent of the graphic information.

[0011] Also, a method for creating an image map having geographical position information (geodetic coordinates) as an electronic map with a minimum amount of information, wherein the image map created by the above electronic map creation method is provided. Is cut out in a rectangular range,
In the file name of the image data in the cut-out range, the coordinates of the two diagonal corners of the image data range frame or the distance between the coordinate 1 point and the diagonal point is used as the file name, and the minimum geographic information is stored in the image data. It is characterized by owning.

A method of creating an image map having geographical position information as an electronic map with a minimum amount of information is provided. The method includes the steps of creating multimedia information (photos, sounds, moving images, etc.) related to the position information. It is characterized in that coordinate data is given to electronic data as a file name, and a data group expressing position information is created.

[0013] The present invention also relates to a method of creating an electronic map in which a house name character string figure is arranged in a house frame figure of a house representing house information in the form of an electronic map. Then, calculate the long side distance of the outer rectangular frame, calculate the distance between passing points where the house frame figure passes through the outer rectangular frame,
When the distance between the passing points is equal to or longer than the long side distance, the number of house names and the character size of the house name character string graphic are calculated so as to be within the long side distance of the outer rectangular frame, and the house is calculated. The center point of the name character string figure is arranged at the center point of the outer rectangular frame, and the house name character string figure is arranged.If the distance between the passing points is shorter than the long side distance, Calculate the inclination between the longest passing points, calculate the number of characters and the character size of the house name character string of the house name character string figure so as to be within the distance between the longest passing points, and calculate the center of the house name character string figure. A point is arranged at a center point of the house frame figure, and the house name character string figure is arranged along a slope between the longest passing points.

Alternatively, an outer rectangular frame which is in contact with the geometric long side of the house frame figure is calculated, the inclination of the long side of the outer rectangular frame is calculated, and the number of house name characters and characters of the house name character string figure are calculated. Calculate the size to fit within the long side distance of the outer rectangular frame,
The center point of the house name character string graphic is arranged at the center point of the outer rectangular frame, and the house name character string graphic is arranged along the inclination of the long side of the rectangular frame.

A method for updating information (address, postal code, telephone number, etc.) relating to position information of an electronic map, wherein the information relating to position information created by the above-described method for creating an electronic map is stored in an external attribute A match search is performed stepwise using the information, and the comparison between the creation date and time information of the information related to the location information and the creation date and time information of the external attribute information determines whether the new information is the old information or the old information. It is characterized by updating to the new information.

According to the present invention, in the creation of an electronic map, a plurality of survey products are used, and the excess or deficiency of each type of survey product is interpolated, so that the electronic map of the whole country and the position information of which is highly accurate can be obtained. To be able to create Further, by creating attribute information of geometric information representing geography via information capable of spatially referring to a position, it is possible to independently create attribute information of a user as configuration information of an electronic map. As a result, the attribute information does not depend on the change of the geometric information, and the use of the attribute information unique to the user enables a geographical expression for each user on a shared electronic map. Further, since the corresponding attribute information is an information asset independent of the system, it can be shared between different types of systems as search key information of general-purpose map information. Further, by using the coordinate data as the file name of the map data and the file name of the multimedia information related to the position information, the image data and the multimedia data can have the minimum geographic information. further,
By using the outer rectangular frame of the house frame figure, calculating the inclination and maximum character size of the house name character string figure for each house frame, determining the center point appropriately and arranging it in the house frame figure, People can easily identify their home names.

[0017]

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

FIG. 1 is an explanatory diagram of an embodiment of the present invention showing a basic configuration of basic data processing for creating an electronic map.

In the present embodiment, the information for specifying the position is not used as the link information of the attribute information of the character and numerical value related to the graphic information which is the configuration information of the electronic map, but the information for specifying the position is replaced with the graphic information of the geometric information. Create the attribute information in a separate table and store the attribute information in an external table. That is, using the key information that specifies the position and is attributed to the position and the spatio-temporal information of the n-dimensional spatial reference model, the spatio-temporal information of the n-dimensional spatial reference model further includes x, Separated into coordinate information for spatially referencing the position of graphic information such as y coordinate and z coordinate indicating height, and information indirectly related to position information such as time axis, barometric pressure axis, and temperature axis. Create a database with the information you have created. For example,
As link information, attribute information for identifying a feature type of graphic information created for each feature is used as key information, and center coordinates of the graphic and date and time information when the link information is created are created in a map space reference table. . Then, a plurality of pieces of clue information related to the position are extracted from the attribute information stored in the external table, and priorities are assigned to the extracted information in the order of higher position determination accuracy, and the extracted information is stepwise in the order of higher priority. First, a map space reference table is searched, and an electronic map is created so that a geographical position can be referred to.

The drawing matching unit 1 shown in FIG. 1 converts a different scale map of the electronic map geometric information file 4 into the same coordinates in the basic configuration of the system program for creating an electronic map, and converts the coordinates into the base coordinates. First, an image map and a vector map are created by joining the drawings. Here, the conversion to the same coordinates is a process for adjusting to the actual scale.

The map space reference data creating unit shown at 2 in FIG. 1 designates, on the coordinate space of the electronic map, key information information such as address information, house information, and facility information on the position of the drawing. Then, the public information for specifying the position information, the universal coordinate information, and the date and time information when the data is created are stored in the database. In the data generated at this time, an address, a postal code, a telephone number, a building name, etc., which are user information for specifying the position, are independently key information.
The basic coordinates of the y-coordinate, the z-coordinate that is height information, the true north slope of the coordinate, the unit of the coordinate scale, and the date and time when the information was generated are stored in the map space reference table 5 in FIG. Created.

When the user searches or updates such information, the information shown in FIG.
The program of the update unit 3 refers to the map space reference table 5 in FIG. 1 and reads out the electronic map geometric information file 4 in FIG. Here, from the information stored in 6 in FIG. 1, information items related to the position are searched for the map space reference table in 5 in FIG.

FIG. 2 is a view for explaining a data processing procedure for creating 15 electronic map geometric information files.

First, a basic land map, a city planning map, a road ledger map, a forest basic map, and similar prescribed maps prepared according to the work rules defined by the survey method are referred to as the plurality of survey result drawings 7. Prepared, these drawings are read by the scanner device 8, and a map (image diagram) as the read image image is stored in each survey result product image file 9 as an original file of the processing. At this time, the rotation of the drawing and the distortion of the range frame are corrected using geodetic coordinates of the surveying accuracy of the drawing with respect to the map frame within the surveying range of the image diagram. Then, blanks other than the surveying range contour of each drawing data are deleted, and coordinate data files of the four corners of the contour are input to the geodetic coordinate table 10 together with the drawing name.

Next, when there are a plurality of surveyed products having the same coordinates, the common coordinate system conversion unit 11 is used to display the results on the screen in a common coordinate system (for example, orthogonal 19 system coordinates or latitude / longitude coordinates) 12 on the system. As shown in FIG. 13, the difference image (pixel image which is not common to both drawings in the boundary drawing of different types of survey result: difference feature) and the common image (boundary of different type of survey result) are superimposed. The common pixel image (common feature) 14 extracted by the above is separated. Then, the difference image (difference feature) is added in the boundary drawing, and the boundary is connected continuously as a single drawing, and the components of the common image (common feature) of each survey result are included. The most accurate features are selected as features to be digitized, and image maps and vector maps as electronic maps are selected.
It is created as a file of image data and vector data and stored in the electronic map geometric information file 15. The electronic map geometric information file 15 has a common normalized coordinate management table. In general, surveying products are often prepared by local governments, so there are a plurality of drawings of administrative boundaries. Since the amount of information is different, this processing is always required.

FIG. 3 is an explanatory diagram of a data structure in which attribute information regarding electronic geometric information and position information is independently generated.

Reference numeral 16 in FIG. 3 denotes geometric information of the electronic map.
17 in FIG. 3 is information for directly determining the position of the electronic map, and 18 in FIG. 3 is various attribute information tables storing user information related to position information using the electronic map.
Therefore, the information in the various attribute information tables 18 becomes external information of the electronic map. Conventional electronic map is electronic map geometric information 1
Although the information of the map space reference table group 17 is managed in a series from 6 onward, the configuration of the present invention employs a method of independent management as basic data processing.

If, for example, it is desired to search customer information held by a company among the information in the various attribute information tables 18 on an electronic map, the information items related to the position are identified from the information in the order of high reliability. The map space reference table group 17 capable of assigning priorities and specifying the direct position of the electronic map geometric information 16 from those information items is searched in an ambiguous manner, coordinates are selected from the search results of the items, and the electronic map geometric information 16 is selected. , Geometric information can be read from the attribute information.

Here, since the date and time information of the map space reference table group 17 indicates the date and time of data creation, it is possible to confirm the new and old information of the various attribute information tables 18 and update the information. For example, the customer information in the various attribute information tables 18 is constantly updated independently of the electronic map, and the name, address, and telephone number at the time when the customer information is registered are searched using the data in the map space reference table group 17. If the address matches but the name and telephone number do not match, it is checked which information is older by comparing it with the date and time information in the map space reference table group 17, and the map space reference table group 17 is out of date. In such a case, the name and telephone number can be updated.

The object number of the map space reference table group 17 indicates that when there is a plurality of pieces of geometric information in the same coordinate space in the geometric information of the electronic map, the By using the object number as the object number, the number separated for each feature from the coordinate information other than the number (for example, from the coordinates of the building name) and the center coordinate that can be specified as the geometric information, the geometric information can be specified in addition to the position search of the electronic geometric information. It is possible.

FIG. 4 shows multimedia information 21 related to a geographical position (eg, audio, photographic image, moving image, etc.).
FIG. 7 is an explanatory diagram of a method of giving an expression as position information to a file of FIG. Here, the information to which the position information is added by the present method is classified into two methods according to the nature of the information.

The first method is as shown at 20 in FIG. 4. In the case of an image map image obtained by converting a map into an image as shown at 20 in FIG. In this method, corner coordinates and upper right coordinates (or a diagonal distance to the upper right corner) are added to the file name of the image. When the above-mentioned image is cut out in the designated range of the electronic map geometric information file 19 in FIG. 4, the cut-out range coordinates are acquired from the 22 common normalized coordinate management tables. The second assigning method is information in a case where the information is not geographically expressed but indicates information related to position information, and is a method of assigning one-point coordinates to a file name. As described above, by adding the position information to the file name, the information is released from the information unique to the geographic information system without depending on the system similarly to the information group 6 in FIG.

FIG. 5 is a diagram showing a method of generating a house name character string suitable for a house frame in a geometric expression of an electronic map.

In the case of FIG. 5 (a), a rectangular outer frame including the house frame is obtained by the house frame coordinates, and the long side of the outer frame is calculated. If the longest side of the distance between the passing points at the coordinates (xn, yn) of the house frame is equal to or longer than the long side of the above-described outer frame, the longer side of the outer frame is used as the generation distance of the house name character string, The character width is calculated using the number of name characters, the character size is set, and the house name character string is generated with the figure center of the rectangular outer frame surrounding the house name frame as the center of the house name character string.

On the other hand, as shown in FIG. 5B, when the distance between the longest passing points of the house frame is shorter than the long side of the rectangular outer frame, the start coordinates of the longest passing point and the slope of the next point are calculated. Using this as the inclination of the house name character string, a house name character string can be generated centering on the center of the house frame figure.

There is also a method of generating a house name character string different from the above. First, a rectangular outer frame is calculated so as to be in contact with the geometric long side of the house frame figure, and the inclination of the long side of the outer frame is calculated. Then, the number of characters and the character size of the house name character string figure are calculated so as to be within the long side distance of the outer frame, and the center point of the house name character string figure is arranged at the center point of the outer frame to determine the length of the outer frame. This is a method in which house name character string figures are arranged along the slope of the side.

In the processing of the method of generating a house name character string,
Since the center of generation of the house name character string is set at the center of the figure of the house frame, it matches the coordinates of the house name (name as house information) generated in the map space reference table 5 of FIG. Electronic geometry information can be deleted and changed.

Each of the map creation methods described above is
Needless to say, they can be implemented in combination as appropriate.

[0039]

As described above, according to the present invention, when creating a database of an electronic map of the whole land area, existing surveying products can be optimally combined to represent the most accurate and system-independent position information. Information that is the basis of geographic information can be created. Unlike the related art, the creation area is not limited, and information unique to the map system is not included in the electronic map data.

Further, since the geometric information and the attribute information of the electronic map are generated independently and asynchronously, even if the data is updated on the user side, the electronic map does not need to be updated. Operation is reduced.

Since the coordinate data is used for the file name of the map data and the file name of the multimedia information related to the position information, it is possible to make the image data and the multimedia data possess the minimum geographic information. it can.

Further, using the outer rectangular frame of the house frame figure,
Since the inclination and the maximum character size of the house name character string figure are calculated for each house frame, and the center point is determined and arranged in the house frame figure, the user can easily identify the house name.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an embodiment of the present invention illustrating the principle of the present invention.

FIG. 2 is an explanatory diagram of creating an integrated electronic map from each survey result in the embodiment.

FIG. 3 is an explanatory diagram for creating attribute information relating to position information independent of a system in the embodiment.

FIG. 4 is an explanatory diagram of a method of expressing multimedia information related to a geographical position in the embodiment.

FIGS. 5A and 5B are explanatory diagrams showing a method of generating and arranging a house name character string figure in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Drawing matching part 2 ... Map space reference data creation part 3 ... Update part 4 ... Electronic map geometric information file 5 ... Map space reference table 6 ... User side information 7 ... Survey result drawing 8 ... Scanner device 9 ... Survey result product image file 10 geodetic coordinate table 11 common coordinate system converter 12 common coordinate system 15 electronic map geometric information file 16 electronic map geometric information 17 map space reference table group 18 various attribute information tables 19 Electronic map geometric information file 20 ... Image map image 21 ... Multimedia information 22 ... Common normalized coordinate management table

Claims (7)

[Claims] 1. A method for creating an electronic map of the entire land area, comprising preparing a plurality of types of drawings, which are surveying products created according to work rules defined by the surveying method, Is read by a scanner device, the rotation of the drawing and the distortion of the range frame are corrected with geodetic coordinates of the surveying accuracy within the map of the surveying range of the image diagram of the read drawings, and the corrected drawings are displayed. Are converted to the same survey coordinate values, the converted drawings are continuously superimposed on the same origin, and the difference feature of each superimposed survey result is added,
A method for creating an electronic map, comprising: selecting a feature having the highest accuracy as a feature of an electronic map as a common feature and constructing an image map and a vector map as an electronic map. 2. A method for creating position information for determining a geographical position held by an electronic map, comprising: link information between graphic information, which is configuration information of the electronic map, and attribute information relating to the electronic map; The position of the graphic information is identified or separated into key information resulting from the position, the coordinate information of the graphic information, and the creation date and time information of the information, and the link information including the separated information is referred to as the graphic information. Is a method for creating an electronic map, which is created as independent information. 3. A method for creating an image map having geographical position information as an electronic map with a minimum amount of information, wherein the image map created by the electronic map creation method according to claim 1. Is cut out in a rectangular range, and the coordinates of two diagonal corners of the image data range frame or the distance between one coordinate point and the diagonal point is set as a file name in the file name of the image data in the cut-out range. A method of creating an electronic map, which has a minimum geographic information. 4. A method for creating an image map having geographical position information as an electronic map with a minimum amount of information, wherein coordinate data is stored in electronic data of multimedia information related to the position information with a file name. And creating a data group expressing positional information. 5. A method of creating an electronic map in which a house name character string figure is arranged on a house frame figure of a house representing house information in the form of an electronic map, wherein a geometric outer rectangular frame of the house frame figure is calculated. Calculating the long side distance of the outer rectangular frame; calculating the distance between passing points where the house frame figure passes through the outer rectangular frame; the distance between the passing points is equal to or longer than the long side distance. In this case, the number of characters and the character size of the house name character string graphic are calculated so as to be within the long side distance of the outer rectangular frame, and the center point of the house name character string graphic is set at the center of the outer rectangular frame. When the distance between passing points is shorter than the long side distance, the slope between the longest passing points of the house frame figure is calculated, and the house name character is placed. The number of house names and the character size of the house name character string of the column figure are calculated so as to be within the distance between the longest passing points, and the house name is calculated. String centroid point arranged at the center point of the house frame figure placing pedigree name character string figure along the slope between the maximum passing points, how to create an electronic map, characterized in that. 6. A method of creating an electronic map in which a house frame figure and a house name character string figure representing house information in the form of an electronic map are arranged, wherein an outer envelope rectangle in contact with a geometric long side of the house frame figure. Calculate the formwork, calculate the inclination of the long side of the enclosing rectangular form, calculate the number of house name characters and the character size of the house name character string figure so as to be within the long side distance of the enclosing rectangular form. An electronic map, wherein the center name of the house name character string graphic is arranged at the center point of the outer rectangular frame, and the house name character string graphic is arranged along the inclination of the long side of the rectangular frame. How to create 7. A method for updating information relating to position information of an electronic map, comprising: step-by-step, using information of an external attribute, information relating to position information created by the method for creating an electronic map according to claim 2. The new information and the old information are determined by comparing the created date and time information of the information related to the location information and the created date and time information of the external attribute information, and the old information is updated to the new information. A method for updating an electronic map, characterized in that: