JP2014153824A - Map generation device and display method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a map generation device that implements a graphic editing process at high speed in a parallel process, and to provide a display method that causes a display device to display the generated map.SOLUTION: The map generation device comprises: a graphic editing process section that starts up a plurality of graphic editing processes; a parallel process range definition section that defines an area of a plurality of hierarchies; a parallel process management section that designates, as a process range, the defined process range with respect to the graphic editing process in order from an area of the undermost layer, stands by until a process of an area of a lower hierarchy is all finished, and then, starts allocating an area process of an upper hierarchy; and a process feature extraction section that has an inclusion determination function of extracting only a graphic contained in the process range allocated by the parallel process management section and having an editing process not completed from electronic map data. The graphic editing process includes an editing function required in performing a map generation, an inspection function of a graphic after being edited and a modification function which are required for the graphic editing.

Description

  The present invention relates to a map generation device that edits and generates a map at a high speed by parallel processing, and a display method for displaying the generated map on a display device.

  In the conventional map data generation device, a vertex thinning processing unit that edits map graphics, a polygon shaping unit that extracts and shapes shapes that are inappropriate after editing, and manual correction of inappropriate polygon shapes A deformation correction unit that corrects the image is provided (for example, Patent Document 1).

  When editing a map figure, it is verified whether the edited figure has an inappropriate shape, and if it is determined to be an inappropriate shape, correction is required. This inappropriate shape verification work requires two types of verification work: the verification work for the edited graphic and the verification work for the edited graphic and the neighboring graphic. In the verification work on the edited figure, it is confirmed whether or not an intersection or a contact that has not occurred before the figure editing has occurred between the sides constituting the figure. This is called torsion verification in the figure. In the verification work between the edited figure and the neighboring figure, it is checked whether the positional relation or connection relation of the figure has changed. For example, contact or overlap between figures that did not exist before editing, or whether the connection between figures that were connected before editing is lost, or the like. This is called verification of the phase relationship with the surrounding figure.

  In order to realize parallel processing of graphic editing processing in the map data generation device, it is necessary to synchronize with the process of processing the peripheral graphic for the verification work of the phase relationship with the peripheral graphic. During the verification of the phase relationship with the peripheral graphic, data lock is performed on the data of the peripheral graphic in order to prevent the peripheral graphic from being changed by another process. On the other hand, since a process trying to edit a figure in data lock is in a standby state, parallel processing cannot be executed efficiently.

  In addition, in the conventional map data generation device, the map data generation device may be configured by distributed processing of a plurality of computers connected by a network. However, synchronization and processing allocation methods and processing during distributed processing The procedure has not been studied.

As a method for realizing graphic simplification in parallel processing, there is a method for 3D polygon mesh data (for example, Non-Patent Document 1).
In Non-Patent Document 1, in order to simplify the three-dimensional polygon mesh data with a plurality of servers, region division using the concept of region growth method is performed. This technique can be easily applied when all figures having the same shape such as polygon mesh data are connected and configured without gaps, but is difficult to apply in the case of map figures. This is because a huge figure such as a polygon showing the shape of the sea or a polygon showing the shape of the continent has a structure in which small polygons such as rivers, parks, and buildings are overlapped, and the positional relation and connection relation of the figure are complicated. It is because it has become.

JP 2007-256402 A

Yasuo Yoshida, Satoshi Konno, Yoshimasa Tokuyama, “Distribution of 3D model weight reduction method for PC cluster environment”, Journal of Art and Science Society Vol.7, No.3 pp. 113-123

  In such a map generation device, in order to efficiently perform graphic editing processing in parallel processing, it is necessary to minimize synchronization between processes required for verification work of a phase relationship with surrounding graphics. . However, since the map figure has a structure in which various figures of large and small are overlapped, if it becomes a figure surrounding a figure like a huge land polygon, it will affect a wide range. In parallel processing, it is necessary to uniformly assign processing to each process that performs graphic editing processing. However, map graphics are difficult to divide into regions because the positional relationship and connection relationship are complicated and the density of partial graphics is different. Therefore, it is necessary to allocate work evenly to processes while considering synchronization between processes, and there is a problem that it is difficult to efficiently perform graphic editing processing in parallel processing.

  The present invention has been made to solve the above-described problems, and provides a map generation device that performs graphic editing processing efficiently and at high speed in parallel processing, and a display method for displaying the generated map on a display device. The purpose is to do.

  A map generation apparatus according to the present invention is a map generation apparatus that generates a new map by performing an editing process related to a shape of a graphic from electronic map data including graphic data representing the shape of a landform or a feature. The graphic editing processing unit for starting a plurality of graphic editing processes, the parallel processing range defining unit for defining a plurality of hierarchical regions, and the processing range defined by the parallel processing range defining unit in order from the lowest layer region A parallel processing management unit that designates as a processing range for the graphic editing process and waits until all the processing of the lower layer region is completed, and then starts the allocation of the upper layer region processing, and the parallel processing management An inclusion determination function for extracting only graphics that are included in the processing range assigned by the section and have not been edited from the electronic map data. A physical feature extraction unit, and the graphic editing process includes an editing function necessary for map generation, and an edited graphic inspection function and a correction function necessary for graphic editing. It is a feature.

  According to the present invention, graphic editing processing can be performed efficiently and at high speed in parallel processing.

It is a block diagram which shows the structure of the map production | generation apparatus which concerns on Embodiment 1 of this invention. It is a flowchart of the figure edit process in the map production | generation apparatus which concerns on Embodiment 1 of this invention. It is a flowchart of the process range definition process in the map production | generation apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the definition method of the process range in the map production | generation apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the example of the area | region which includes the map which the map generation apparatus which concerns on Embodiment 1 of this invention produces | generates. It is a figure which shows the example which divided | segmented and integrated the map which the map production | generation apparatus which concerns on Embodiment 1 of this invention produces | generates in the polygon shape according to the administrative district boundary. It is an example showing a region dividing method using kd-tree. In this example, the result of area division using kd-tree is shown in a tree structure. It is a flowchart of the figure edit process in the map production | generation apparatus which concerns on Embodiment 1 of this invention. It is a block diagram which shows the structure of the map production | generation apparatus which concerns on Embodiment 2 of this invention. It is a flowchart which shows a part of figure edit process in the map production | generation apparatus concerning Embodiment 2 of this invention. It is the figure which showed FIG. 4 by the tree structure. FIG. 10 is a diagram showing an outline of a navigation system in a third embodiment.

Hereinafter, in order to explain the present invention in more detail, modes for carrying out the present invention will be described with reference to the accompanying drawings.
Embodiment 1 FIG.
FIG. 1 is a block diagram showing a configuration of a map generation apparatus according to Embodiment 1 of the present invention.
The map generation device expresses a calculation processing unit 1 capable of performing map generation in parallel processing, a storage unit 2 for storing map data including road shape and terrain information, and the shape of terrain or a feature. An input unit 3 that receives input of electronic map data including graphic data to be processed, and an output unit 4 that outputs processing results by display, voice, or the like. The output unit 4 may process and output the processing result into map data such as a car navigation format.
The map generation device generates a map in the arithmetic processing unit 1. Specifically, the target electronic map data is read from the input unit 3 and stored in a map DB 5 (described later) of the storage unit 2. Then, the arithmetic processing unit 1 performs graphic editing work related to the shape of the graphic such as simplification, rotation, and scale conversion necessary for map generation with respect to the graphic information included in the map DB 5 of the storage unit 2. And generate a new map.

  The storage unit 2 includes a map DB 5. In the map DB 5, note information 6 including letters and numbers for displaying road names and feature names on the map and their display positions, and POI (Point Of Interest) information necessary for displaying icons on the map 7. Road network information 8 indicating the connection relationship of roads used for route search and route guidance, background graphic information 9 which is graphic information of features drawn on the background, one-way traffic and traffic time zone restrictions, etc. Information such as traffic regulation information 10 is stored. Various graphic editing operations necessary for map generation are performed on the graphic information included in the map DB 5.

The arithmetic processing unit 1 includes a graphic editing processing unit 11, a parallel processing range definition unit 13, a parallel processing management unit 14, and a processing feature extraction unit 16.
The graphic editing processing unit 11 includes an editing function 20 that performs a graphic editing process necessary for generating a map, and an edited graphic inspection function 21 and a correction function 22 that are necessary for graphic editing. There are 1 or more natural number) graphic editing processes 12, and this graphic editing process 12 is activated.

  The parallel processing range definition unit 13 defines a processing range for the graphic editing process 12 of the graphic editing processing unit 11, and therefore includes only a boundary line including a map region to be edited or a map region to be edited inside. An uppermost hierarchy area definition function 17 for defining an area in contact with the area, an area division function 18 for dividing the uppermost hierarchy area defined by the uppermost hierarchy area definition function 17 and defining a lowermost hierarchy area, and an area An area integration function 19 for defining areas of higher layers by integrating areas divided by the division function 18 is provided, and areas of a plurality of hierarchies are defined.

The parallel processing management unit 14 specifies the processing range defined by the parallel processing range definition unit 13 as the processing range in order from the lowest layer to the graphic editing process 12 of the graphic editing processing unit 11, and Wait until all region processing is completed, and then start allocation of region processing in the upper layer.
The processing feature extraction unit 16 includes an inclusion determination function 15 that determines, from the map DB 5 of the storage unit 2, only a figure included in the processing range assigned by the parallel processing management unit 14. The figure to which the figure editing process is applied is extracted.

FIG. 2 is a flowchart of the graphic editing process in the map generation apparatus according to Embodiment 1 of the present invention.
First, the arithmetic processing unit 1 activates the parallel processing range definition unit 13, and the parallel processing range definition unit 13 defines the processing range (step ST1).

Here, the definition of the processing range of step ST1 will be described with reference to FIGS.
FIG. 3 is a flowchart of processing range definition processing in the map generation apparatus according to Embodiment 1 of the present invention.
4 (a) to 4 (c) are diagrams illustrating a method of defining a processing range in the map generation device according to Embodiment 1 of the present invention.
First, the parallel processing range definition unit 13 defines a region A containing a map to be generated using the highest layer region definition function 17 (step ST21).
For example, as shown in FIG. 4A, when the map 101 is generated, the region 102 is defined so that the graphic included in the map 101 is included.

With reference to FIG. 5, a description will be given of, for example, what is meant by the region including the graphic included in the map.
5 (a) and 5 (b) are diagrams showing examples of regions including a map generated by the map generation device according to Embodiment 1 of the present invention.
For example, as shown in FIG. 5A, when the map is generated by the graphic set 201 including the graphic 201 a and the graphic 201 b, an area including the graphic included in the map is an area with respect to the graphic set 201. An area in a state like 202. That is, the graphic set 201 is located inside the area 202 and indicates a state in which there is no portion in contact with the graphic set 201 and the area 202.

  In step ST21 of FIG. 3, the map to be generated is included, but it is not included. Instead, as shown in FIG. 5B, the L-shaped region 203 includes the graphic set 201 inside, and the boundary line You may be in contact.

  Next, the parallel processing range definition unit 13 divides the area A defined in step ST21 into an arbitrary number using the area dividing function 18, and defines a plurality of area sets B (step ST22). For example, as shown in FIG. 4B, the region 102 is equally divided into a plurality of regions according to the area, and a region set of the regions 103 to 108 is defined. Here, in order to improve the work allocation efficiency of the graphic editing processing unit 11 to each graphic editing process 12 (processing will be described later), it is desirable to divide the area into a larger number of areas than the number of graphic editing processes 12. .

The parallel processing range definition unit 13 uses the region integration function 19 to newly define a region obtained by collecting and integrating a plurality of regions divided in step ST22 (step ST23).
For example, as shown in FIG. 4C, the area 103 and the area 104 in FIG. 4B are integrated, and the area 109 is newly defined. Similarly, the area 106 and the area 107 are integrated to newly define the area 110, and the area 105 and the area 108 are integrated to newly define the area 111. In the example of FIG. 4, two areas are integrated, but the number is not limited to two, and two or more areas may be integrated. In addition, when integrating, those having common sides, those having common points, and those having no common points are preferentially integrated.

Next, the parallel processing range definition unit 13 determines whether the area integrated in step ST23 is the original area A (step ST24). If it is determined that it is not the original area A (in the case of “NO” in step ST24), the process returns to step ST23, and if it is determined that it is the original area A (in the case of “YES” in step ST24). ) Terminates the process.
As described above, the integration process in step ST23 is repeated until all the areas divided in step ST22 are integrated and the shape returns to the shape of the area A in step ST21 before the division.
For example, when all of the areas 109 to 111 shown in FIG. 4C are integrated, the area becomes the area 102 and the processing range definition process is terminated.

The area set defined in step ST22 is referred to as a first hierarchy. Each time integration is performed to obtain a new area set, the second hierarchy and the third hierarchy are called, and the area A defined in step ST21 becomes the highest hierarchy. In other words, the higher number is the upper hierarchy. In the example of FIG. 4, the areas 103 to 108 are the first hierarchy, the areas 109 to 111 are the second hierarchy, and the area 102 is the third hierarchy, which is the highest hierarchy.
The integration process is performed to define an upper layer area. Therefore, the upper layer area needs to be larger than the lower layer area. Therefore, if a plurality of lower layer areas are integrated to define an upper layer area, it is possible to define a larger area than the lower layer.

In FIG. 4, the shape of the region is equally divided by a rectangle, but is not limited to this. For example, it may be a polygon shape indicating the administrative district boundary.
FIG. 6 is a diagram showing an example in which a map generated by the map generation device according to Embodiment 1 of the present invention is divided and integrated into polygonal shapes according to administrative district boundaries.
In the case of FIG. 6, the highest hierarchy is a country polygon like the area 112 in FIG. 6A, and the first hierarchy is a polygon showing the administrative district boundary like the area 113 in FIG. 6B. The region integration is performed so as to become a polygon indicating the administrative district boundary one level higher from the first level to the higher level. For example, in the administrative boundaries of Japan, the first hierarchy is integrated as a municipal polygon, the second hierarchy is a prefecture polygon, and the top hierarchy is an area polygon indicating the country of Japan.

Further, when dividing the top layer area, the vertices constituting the figure may be extracted and divided so that the number of vertices included in each area is the same. In that case, kd-tree can be used. kd-tree is one of the space division data structures.
FIG. 7 shows an example of an area dividing method using kd-tree.
FIG. 7 shows an area dividing method by kd-tree in the case of two dimensions. As shown in FIG. 7A, the region 401 is set as the region of the highest hierarchy. A point inside the area 401 represents a vertex. In kd-tree, division is performed using a plane perpendicular to one of the coordinate axes. In the two-dimensional case, the division is performed on a plane perpendicular to the X axis, the division is performed on a plane perpendicular to the Y axis, and this is alternately repeated. In the case of three dimensions, the three axes of the X axis, the Y axis, and the Z axis are sequentially repeated. The division is performed with the median value of the coordinate values of the vertices included in the axis to be divided so as to be an equilibrium kd-tree.

  Areas 402 to 403 shown in FIG. 7B are obtained by dividing the area 401 in FIG. Similarly, areas 402 to 403 shown in FIG. 7B are divided into areas 404 to 407 shown in FIG. 7C. Further, the areas 404 to 407 shown in FIG. 7C are divided into areas 408 to 415 shown in FIG. 7D. In the example of FIG. 7, the process is repeated until the number of vertices becomes one in the area. However, the process may be terminated in a state where a plurality of figure constituent points are included in the area. In addition, the division into two is repeated so that the balanced kd-tree is obtained. However, since the tree structure has the same depth, it may be divided into three or four.

FIG. 8 shows an example in which the result of area division using kd-tree is shown in a tree structure.
A kd-tree obtained as a result of the division in FIGS. 7A to 7D is shown in a tree structure 501 in FIG.
The numbers given to the nodes correspond to the numbers of the areas 401 to 415 in FIGS. The leaf node is the lowest layer area. At the time of integration, the area pointed to by the child node is integrated, and the area pointed to by the parent node becomes the upper layer area. In addition to creating a kd-tree by dividing the median vertex coordinates, the number of shapes that are completely contained in the region, the number of vertices that make up the shape that is completely contained in the region, and the shape that is completely contained in the region There is also a method of dividing the area so that the sizes of the geometry data are equal.

Returning to the flowchart of FIG.
When the parallel processing range definition unit 13 defines the processing range in step ST1, the arithmetic processing unit 1 next activates the parallel processing management unit 14 (step ST2).
Further, the arithmetic processing unit 1 activates an arbitrary number of graphic editing processes 12 by the graphic editing processing unit 11 (step ST3). The activated graphic editing process 12 enters a standby state.

Next, the parallel processing manager 14 initializes the number i of layers (step ST4). Specifically, i = 0.
The parallel processing management unit 14 increments i (step ST5), and reads an area in the i-th layer that has not been edited from the storage unit 2 (step ST6).
At this point, the parallel processing manager 14 knows how many areas are in the i-th layer.
Next, the parallel processing management unit 14 checks whether or not there is a standby graphic editing process 12 (step ST7). If there is a standby graphic editing process 12 ("YES" in step ST7), it is still It is determined whether there is an unallocated area (step ST8). When there is no standby figure editing process 12 (in the case of “NO” in step ST7), step ST7 is repeated.
In step ST8, when there is an area that has not been allocated yet (in the case of “YES” in step ST8), the parallel processing management unit 14 allocates an area that has not yet been allocated (step ST9).
If it is determined in step ST8 that there is no area not yet allocated (in the case of “NO” in step ST8), the process of step ST9 is skipped.
As described above, the parallel processing management unit 14 periodically checks whether there is an editing process 12 in a standby state, and assigns an area each time at this timing.

In step ST9, when an area in charge of the graphic editing process 12 is allocated, the graphic editing processing unit 11 performs graphic editing processing for the area allocated to the graphic editing process 12. In this graphic editing process, the graphic editing process 12 sets a processing completion flag for each graphic that can be edited in the graphic in the area. A processing completion flag is not set for a figure that is located at the boundary of an area or that crosses an area and cannot be edited. (The graphic editing process will be described later)
The parallel processing management unit 14 monitors the graphic editing process of the graphic editing process 12, and whether the graphic editing process 12 has finished the graphic editing process of all areas in the i-th hierarchy, that is, all of the elements in the same hierarchy. It is determined whether or not the graphic editing process for the area has been completed (step ST10).
If all the graphic editing processes in the i-th hierarchy have not been completed (in the case of “NO” in step ST10), the process returns to step ST7. That is, the parallel processing management unit 14 allocates an unprocessed area to the graphic editing process 12 in the standby state. In this way, the parallel processing management unit 14 waits until the graphic editing process for all the regions in the same hierarchy is completed.

On the other hand, when all areas in the same hierarchy are allocated and the graphic editing process is completed (in the case of “YES” in step ST10), the parallel processing management unit 14 determines whether or not the i-th hierarchy is the highest hierarchy. Judgment is made (step ST11). That is, it is determined whether or not the graphic editing process has been performed for the areas included in all layers.
If it is determined that the i-th layer is not the highest layer (in the case of “NO” in step ST11), the process returns to step ST5. That is, i is incremented, and the graphic editing process for the area included in the upper hierarchy is performed.

When it is determined that the i-th layer is the highest layer (in the case of “YES” in step ST11), the parallel processing management unit 14 checks whether there is a figure for which the processing completion flag is not set (step ST12). .
If it is determined that there is no figure for which the process completion flag is not set (in the case of “NO” in step ST12), the process ends.

When it is determined that there is a graphic for which the processing completion flag is not set (in the case of “YES” in step ST12), the single graphic editing process 12 is processed alone (step ST13). This is because, for example, when the area 203 in FIG. 5B is defined, the figures 201a and 201b whose boundary lines coincide with the area 203 remain without being processed. This is to complete.
In this way, the parallel processing management unit 14 operates so as to first assign an area to each editing process 12 one by one, and to take charge of the next area from the editing process 12 that has completed processing earlier. This is because when there is a variation in the work amount of each region, a plurality of regions having a large work amount are assigned to a specific editing process, and the other editing processes 12 complete the graphic editing process early and enter a process waiting state. This is to prevent the occurrence of a state of being in.

FIG. 9 is a flowchart of the graphic editing process in the map generation device according to Embodiment 1 of the present invention.
When an area in charge of the graphic editing process 12 is assigned in step ST9 of FIG. 2, the graphic editing processing unit 11 performs graphic editing processing. Here, the graphic editing process will be described in detail with reference to FIG.
The graphic editing process is performed by the graphic editing process 12 of the graphic editing processing unit 11.
Note that the processing of the parallel processing management unit 14 described in FIG. 2 and the graphic editing processing by the graphic editing process 12 described here are operated in parallel in different processes or different threads.
The graphic editing process 12 is in a standby state when no work is assigned by the parallel processing management unit 14 (step ST101).
When the work is assigned by the parallel processing management unit 14, the graphic editing process 12 includes only the graphic to be edited in the processing feature extraction unit 16, specifically, in the area in charge, and An instruction is given to extract only graphics for which graphic editing processing has not been completed (step ST102). In other words, objects positioned at the boundary of the region or straddling the region are not subject to graphic editing processing.

The graphic editing process 12 performs graphic editing processing on each graphic extracted by the processing feature extraction unit 16 in step ST102 (step ST103).
Specifically, the graphic editing process 12 performs editing using the editing function 20, and verifies the twist relation in the graphic and the phase relationship between the peripheral graphic using the inspection function 21 for the edited graphic. carry out. If there is a problem, it is converted into an appropriate shape using the correction function 22.

Next, the graphic editing process 12 sets a processing completion flag for the graphic that has been processed so that the graphic that has been processed can be distinguished from the graphic that has not been processed (step ST104).
The graphic editing process 12 determines whether graphic editing has been performed on all the graphics extracted by the processing feature extraction unit 16 in step ST102 (step ST105), and determines that graphic editing has been completed for all the graphics. If it has been done (in the case of “YES” in step ST105), the process is terminated, and the graphic editing process 12 returns to the standby state.
If it is not determined that graphic editing has been completed for all the graphics (in the case of “NO” in step ST105), the process returns to step ST103, and graphic editing processing is performed on the graphics for which processing has not been completed.

  As described above, the uppermost hierarchical area defining function 17 for defining the area including the map to be generated, the area dividing function 18 for dividing the defined area, and the area integrating function 19 for integrating the defined areas are provided. In addition, by providing the parallel processing range definition unit 13 that defines a hierarchical processing range, it is possible to define a processing region of an arbitrary size, and further, it is possible to define a processing range that is hierarchized into a plurality of layers. Become.

  In addition, with respect to the processing range of each hierarchy defined by the parallel processing range definition unit 13, the processing feature extraction unit 16 having the inclusion determination function 15 is provided for each processing range that is completely included in the processing range area. The graphic editing process can perform graphic editing processing. Since the graphic positioned at the boundary of the processing range area is not completely included in any processing range area of the hierarchy, the graphic editing process is not performed. Therefore, even in the verification work of the phase relationship with the peripheral graphic, the shape of the peripheral graphic is not changed by another graphic editing process 12, and the processing can proceed without synchronization between the graphic editing processes 12. In the upper hierarchy, an area that combines the processing areas of the lower hierarchy is defined, so in the lower hierarchy, graphics that are not completely included in the area are extracted as processing target graphics. come.

  Further, in the equal division by the rectangle, the division number can be easily adjusted. Therefore, it is possible to complete the processing at high speed with a simple algorithm for the division processing. Further, in the division using the administrative district boundary, the polygon of the administrative district boundary included in the map data can be used. By using polygons that are in a hierarchical relationship with administrative boundaries, it is not necessary to newly define and manage a parallel processing range definition area polygon.

  Furthermore, pay attention to the vertices that make up the figure when dividing the area, the number of figures that are completely contained in the area, the number of vertices that make up the figure that is completely contained in the area, the size of the geometry data of the figure that is completely contained in the area, etc. In the method of constructing a kd-tree, the work can be made uniform in each hierarchical area by using the kd-tree even at the time of integration. In other words, because the graphic editing processing time of each area for each hierarchy is equal, parallel processing can be performed efficiently, only a single editing process has work, and another editing process is waiting without work Can be avoided

  In this embodiment, the calculation processing unit 1, the storage unit 2, the input unit 3, and the output unit 4 are included in the map generation device. However, the present invention is not limited to this, and the map generation device includes only the calculation processing unit 1. May be provided.

As described above, in the map generation device according to the first embodiment, the definition of the hierarchical processing range eliminates the need for synchronous processing when a process executes a process in each hierarchy, thereby efficiently and rapidly displaying graphics. Editing processing can be performed.
In addition, since an area of an arbitrary size can be specified, the work of each graphic editing process can be made uniform by cutting out a small area.

Embodiment 2. FIG.
FIG. 10 is a block diagram showing the configuration of the map generation apparatus according to Embodiment 2 of the present invention.
In addition, about the structure similar to what was demonstrated in FIG. 1, the overlapping description is abbreviate | omitted. The only difference from the map generation apparatus shown in FIG. 1 is that the parallel processing management unit 14 further includes a processable range determination function 23.
The processable range determination function 23 manages the hierarchical process range area defined by the parallel process range definition unit 13 in a tree structure. In other words, the correspondence relationship is managed as to which upper hierarchy area is obtained by integrating which lower hierarchy areas.

In the second embodiment, after performing the same processing as step ST1 to step ST3 of FIG. 2, the parallel processing management unit 14 assigns an area where a processable flag is set to the graphic editing process 12 in the standby state.
Thereafter, each graphic editing process 12 performs graphic editing processing for the area in charge.
FIG. 11 is a flowchart showing a part of the graphic editing process in the map generating apparatus according to Embodiment 2 of the present invention.
The processing after the area is allocated to each graphic editing process 12 by the parallel processing management unit 14 will be described with reference to FIG.
First, the graphic editing processing unit 11 causes the graphic editing process 12 to perform graphic editing processing (step ST31). Since the graphic editing process in step ST31 is the same as step ST8 in FIG. 2 of the first embodiment, detailed description thereof is omitted.

Next, the graphic editing process 12 turns off the processable flag (step ST32).
The processable range determination function 23 of the parallel processing management unit 14 checks whether or not a parent node exists based on the hierarchized processing range area managed by the tree structure (step ST33).
In step ST33, if it is determined that there is no parent node (in the case of “NO” in step ST33), that is, if it is determined that the area is the highest layer, the process ends.

  On the other hand, when it is determined in step ST33 that there is a parent node (in the case of “YES” in step ST33), the processable range determination function 23 is a child node of the same depth existing under the same parent node. It is checked whether or not all graphic editing processes are completed (step ST34). That is, it is checked whether or not the graphic editing process has been completed for all the areas in the lower hierarchy having the same upper hierarchy area. Specifically, it is checked whether or not the processable flags of all lower layer areas are off.

In step ST34, when it is not determined that the graphic editing processing of all child nodes having the same depth is completed (in the case of “NO” in step ST34), the processable range determination function 23 enters a standby state. That is, the process waits until the graphic editing processing of all lower layer areas existing under the same upper layer area is completed.
On the other hand, when it is determined in step ST33 that all the graphic editing processes of the child nodes having the same depth have been completed (in the case of “YES” in step ST35), the processable range determination function 23 determines the parent node, that is, Then, the processable flag for the area one level higher is set (step ST35), and the process ends.
Thereafter, the parallel processing management unit 14 again assigns an area where a processable flag is set to the graphic editing process 12 in the standby state.

The process of FIG. 11 will be described with reference to FIG.
FIG. 12 is a diagram showing the example of FIG. 4 in a tree structure.
As shown in FIG. 12A, the processable range determination function 23 creates a tree structure 301, and at the start of processing, a processable flag is set on a leaf node like the node 302. Note that the numbers written in the nodes correspond to the region numbers in FIG. 4, and the node lines indicate that the processable flag is set.
As shown in FIG. 12B, when the graphic editing process of the areas 103 and 104 which are all child nodes of the area 109 is completed, a processable flag is set in the area 109 and the graphic editing process of the area 109 is started. .

  As described above, in the second embodiment, the parallel processing management unit 14 includes the processable range determination function 23, and the processable range determination function 23 manages the process range area with a tree structure. When the child node graphic editing process is completed, the own graphic editing process is started without waiting for the child node graphic editing process belonging to the other parent node to be completed. That is, in the upper layer area, the graphic editing process can be performed when the graphic editing process for all the areas included in the layer immediately below the upper layer is completed.

  In this embodiment, the calculation processing unit 1, the storage unit 2, the input unit 3, and the output unit 4 are included in the map generation device. However, the present invention is not limited to this, and the map generation device includes only the calculation processing unit 1. May be provided.

  As described above, in the map generation device according to the second embodiment, it is possible to minimize the synchronization processing required between the layers, and to perform the graphic editing process at high speed.

The output unit 4 shown in FIGS. 1 and 10 is a display unit having a display function, and the input unit 3 receives an input of a range to be displayed on the display unit, a scale, a type of a feature to be displayed, and the like. It is also possible to perform graphic editing processing on the map area designated from the input unit 3 and display the generated map on the display unit.
That is, it can also be used for map display by a car navigation system.

Embodiment 3 FIG.
In Embodiments 1 and 2 described above, the map generation apparatus according to the present invention may be applied to a car navigation system. However, the map generation apparatus is not limited to a navigation apparatus of a car navigation system, and may be applied to a person, a vehicle, It may be a navigation device for a moving body including a railroad, a ship, an aircraft, or the like, or may be applied to a server of a navigation system. Further, the present invention can be applied to any form such as a navigation system application installed in a portable information terminal such as a smartphone, a tablet PC, or a mobile phone.

  FIG. 13 is a diagram showing an outline of the navigation system in the third embodiment of the present invention. In this navigation system, the in-vehicle device 500 performs map generation processing and navigation processing in cooperation with at least one of the portable information terminal 501 such as a smartphone and the server 502, or at least one of the portable information terminal 501 such as a smartphone and the server 502. However, it can take various forms such as performing map generation processing and navigation processing, and displaying map information on the in-vehicle device 500. Hereinafter, a configuration aspect of the navigation system will be described.

  In the navigation system according to the third embodiment, the server 502 performs map generation processing, except for the case where the in-vehicle device 500 shown in FIG. 13 has all the functions of the map generation device according to the first and second embodiments. When the result is provided to the user by displaying the result on the in-vehicle device 500, and the portable information terminal 501 performs a map generation process in cooperation with the server 502, and displays the map generation result on the in-vehicle device 500 to the user. The case where it provides is demonstrated.

First, a case where the server 502 performs map generation processing and displays the map generation result on the in-vehicle device 500, that is, a case where the in-vehicle device 500 functions as a display device in cooperation with the server 502 having the map generation function will be described. To do.
In this configuration, the case where the in-vehicle device 500 directly communicates with the server 502 or the in-vehicle device 500 communicates with the server 502 via the portable information terminal 501 can be considered. The server 502 functions as a map generation device including the arithmetic processing unit 1 described in the first and second embodiments. The in-vehicle device 500 functions as a display device including at least the output unit 4 (an output unit having a display function) for providing the map generation result by the server 502 to the user.

In this case, the in-vehicle device 500 basically has only a communication function and a display function, and receives the map generation result by the server 502 and provides it to the user.
That is, the server 502 is a map generation device including the arithmetic processing unit 1, and the server 502 that is the map generation device displays the generated map generation result on the in-vehicle device 500 that is a display device.
Even if comprised in this way, the effect similar to Embodiment 1, 2 can be acquired.

A case will be described in which the portable information terminal 501 performs map generation processing in cooperation with the server 502 and the in-vehicle device 500 provides the map generation result to the user.
In this configuration, it is conceivable that the in-vehicle device 500 communicates with the server 502 via the portable information terminal 501, and the application of the portable information terminal 501 performs map generation processing in cooperation with the server 502. The in-vehicle device 500 functions as a display device including at least the output unit 4 (an output unit having a display function) for providing the user with the map generation result by the portable information terminal 501 and the server 502.

Also in this case, the in-vehicle device 500 basically has only a communication function and a display function, and receives a map generation result by cooperation between the portable information terminal 501 and the server 502 and provides it to the user.
That is, the generated map generation result is displayed on the in-vehicle device 500 which is a display device by the application of the portable information terminal 501.
Even if comprised in this way, the effect similar to Embodiment 1, 2 can be acquired.

  In the present invention, within the scope of the invention, any combination of the embodiments, or any modification of any component in each embodiment, or omission of any component in each embodiment is possible. .

  1 arithmetic processing unit, 2 storage unit, 3 input unit, 4 output unit, 5 map DB, 6 note information, 7 POI information, 8 road network information, 9 background graphic information, 10 traffic regulation information, 11 graphic editing processing unit, 12 figure editing process, 13 parallel processing range definition section, 14 parallel processing management section, 15 inclusion determination function, 16 processing feature extraction section, 17 top layer definition function, 18 area division function, 19 area integration function, 20 editing Function, 21 inspection function, 22 correction function, 23 processable range determination function, 500 in-vehicle device, 501 portable information terminal, 502 server.

Claims (8)

A map generation device for generating a new map by performing an editing process related to a shape of a graphic from electronic map data including graphic data representing the shape of a terrain or a feature,
A graphic editing processing unit for starting a plurality of graphic editing processes;
A parallel processing range definition section that defines areas of multiple hierarchies;
Specify the processing range defined by the parallel processing range definition unit as the processing range for the graphic editing process in order from the lowest layer area, wait until all the processing in the lower layer area is completed, A parallel processing management unit that starts allocation of area processing in the hierarchy;
A processing feature extraction unit having an inclusion determination function that extracts only graphics that are included in the processing range assigned by the parallel processing management unit and that have not been edited, from the electronic map data. ,
The map editing apparatus according to claim 1, wherein the graphic editing process includes an editing function necessary for generating a map, and a function for inspecting and correcting a graphic after editing necessary for graphic editing.   The parallel processing range definition unit includes a top-level layer region definition function that defines a region containing a map region to be edited or a region in which the map region to be edited is included and only a boundary line is in contact with the map region to be edited, An area division function that divides the highest hierarchy area defined by the area definition function and defines the lowest hierarchy area, and an area integration function that defines the upper hierarchy area by integrating the areas divided by the area division function; The map generation apparatus according to claim 1, further comprising:   The map generation apparatus according to claim 2, wherein the parallel processing range definition unit generates an area obtained by equally dividing the uppermost hierarchy area into a plurality of areas according to an area, and sets the area as the lowest hierarchy area. The parallel processing range definition unit generates an area obtained by dividing the highest hierarchy area into a plurality of areas according to administrative boundaries, and sets the lowest hierarchy area as the lowest hierarchy area,
The map generation apparatus according to claim 2, wherein the area integration function integrates areas divided according to the administrative district boundary.   The parallel processing range defining unit divides the top hierarchical region by the region dividing function using the concept of kd-tree so that graphic simplification processing of each region for each layer is completed in the same processing time, 3. The map generation apparatus according to claim 2, wherein a region of a parent node which is a region of the upper hierarchy is defined by integrating regions of child nodes of kd-tree by an integration function.   The parallel processing management unit manages the correspondence of which lower hierarchy area is integrated into which upper hierarchy area, and if all the processing of the lower hierarchy area that is configured is completed, The map generation apparatus according to claim 1, further comprising a processable range determination function that enables processing of the upper layer area. A map generation device that performs editing processing related to the shape of a graphic and generates a new map and displays it on a display device from electronic map data that includes graphic data representing the shape of the terrain or a feature,
A graphic editing processing unit for starting a plurality of graphic editing processes;
A parallel processing range definition section that defines areas of multiple hierarchies;
Specify the processing range defined by the parallel processing range definition unit as the processing range for the graphic editing process in order from the lowest layer area, wait until all the processing in the lower layer area is completed, A parallel processing management unit that starts allocation of area processing in the hierarchy;
A processing feature extraction unit having an inclusion determination function that extracts only graphics that are included in the processing range assigned by the parallel processing management unit and that have not been edited, from the electronic map data. ,
The map editing apparatus according to claim 1, wherein the graphic editing process includes an editing function necessary for generating a map, and a function for inspecting and correcting a graphic after editing necessary for graphic editing. A display method for generating a new map by performing an editing process related to the shape of a graphic from electronic map data including graphic data representing the shape of a terrain or a feature, and displaying the map on a display device,
A step in which a graphic editing processing unit starts a plurality of graphic editing processes;
A step in which a parallel processing range definition unit defines areas of a plurality of hierarchies;
The parallel processing management unit designates the processing range defined by the parallel processing range definition unit as the processing range for the graphic editing process in order from the lowest layer region until all the processing in the lower layer region is completed A step of waiting and starting allocation of area processing in a higher hierarchy;
A step having an inclusion determination function for extracting only a graphic that is included in the processing range assigned by the parallel processing management unit and that has not been edited, from the electronic map data. And
A display method characterized in that the graphic editing process includes an editing step necessary for generating a map, and an edited graphic inspection step and a correction step required for graphic editing.

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