JP5795238B2 - Road estimation device and program - Google Patents

Description

The present invention relates to a road estimation instrumentation 置及 beauty programs, in particular, it relates to road estimated instrumentation 置及 beauty program for estimating the distance between two specified points between urban and urban.

As a technique for automatically estimating the distance between two points,
1) A method for holding information equivalent to a road map and returning the shortest route among various routes connecting two points as seen in a car navigation system (see, for example, Patent Document 1);
2) A method using a linear distance or a Manhattan distance;
There are two main methods.

  The above method 1) is used in a situation where accuracy is required, such as car navigation, because it is possible to calculate an accurate route.

  The above method 2) does not require a large storage device and can perform calculation at a higher speed. Therefore, it is necessary to calculate the distance at a high frequency, for example, arbitrary two points of a given number of points. It is used in situations where all the roads connecting the two are calculated, or where available storage resources are limited.

Japanese Patent No. 3076026

  However, among the prior arts, according to the method 1), a large amount of map data is required, and various routes that can be moved between two points are calculated. It was necessary to calculate. That is, there is a problem that a large-scale storage device is necessary and a problem that a large amount of processing is necessary for calculation.

  Further, according to the method 2), there is a problem in that it is impossible to calculate an accurate route that reflects the actual movement in the city.

The present invention has been made in view of the above points, and does not require a large-scale storage device, can be calculated at high speed, and more accurately reflects the actual movement in the city. and to provide a way estimated instrumentation 置及 beauty program that can be calculated.

(但し、βは事前に設定したパラメータ定数、ｘ_１，ｘ_２，ｙ_１，ｙ_２は前記入力された２点の座標)
の式を用いて、前記入力された２点の道のりを推定する推定手段と、を有する。
In order to solve the above-described problem, the present invention (Claim 1) is a path estimation device for estimating a path between two input points roughly.
Storage means for storing the number of intersections or total road distance representing the degree of freedom of route selection in mesh units;
Mesh acquisition means for acquiring a mesh included in a rectangle whose diagonal is a line connecting the two input points, from the storage means;
A parameter for calculating a parameter p that obtains the sum c of the obtained numerical values of degrees of freedom of the mesh and the area S of the rectangle, and increases as the area S is smaller and as the sum of numerical values c of the degrees of freedom increases. A calculation means;
Using the parameter p,

(Where β is a parameter constant set in advance, and x ₁ , x ₂ , y ₁ and y ₂ are the coordinates of the two input points)
And an estimation means for estimating the distance between the input two points.

According to the present invention, the calculation of the distance is not a straight line distance, but a distance reflecting movement in the city, and the L _p norm using the parameter p is used at the distance, and the intersection for each mesh in the unit rectangle. Since the number is used, it is possible to estimate the distance between two points more accurately at high speed without requiring a large-scale storage device.

  In addition, since only two mathematical expressions are obtained after the total number of intersections in the target rectangle is obtained, it can be calculated at high speed.

It is a block diagram of the route estimation apparatus in one embodiment of this invention. It is an example of data of the mesh-intersection number database in one embodiment of the present invention. It is a flowchart of the outline | summary operation | movement in one embodiment of this invention.

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

  FIG. 1 shows a configuration of a route estimation apparatus according to an embodiment of the present invention.

  The route estimation apparatus shown in FIG. 1 includes an in-rectangular mesh information acquisition unit 1, a distance adjustment parameter determination unit 2, a route estimation unit 3, and a mesh-intersection number database 4.

Mesh - intersection number database 4, as shown in FIG. 2, the number of each mesh range of the mesh is obtained by recording the number of intersections contained in the mesh, it is provided in a storage medium such as a hard disk . It is also possible to configure so that the mesh number is uniquely specified from the latitude and longitude handled by this apparatus. In that case, it is possible to configure only by the mesh number and the number of intersections without having a mesh range.

Further, the information stored in the mesh-intersection number database 4 is not necessarily the number of intersections as long as the information is correlated with ease of movement within the mesh range. For example, the total road distance in the mesh may be used instead of the number of intersections.

  FIG. 3 is a flowchart of an outline operation in one embodiment of the present invention.

Step 1) rectangular mesh information acquisition unit 1 receives the coordinates of two points that is input to the device as input, information of all meshes included a line segment connecting these two points to rectangle shall be the diagonal line To the mesh-intersection number database 4.

  Step 2) The rectangular mesh information acquisition unit 1 refers to the mesh-intersection number database 4 for all mesh information included in the acquired rectangle, and obtains the total number of intersections in the rectangle.

Step 3) The distance adjustment parameter determination unit 2, the total intersection number c a rectangular area obtained by rectangular mesh information acquisition unit 1 (i.e., the diagonal line segments connecting two points that are input to the device A non-negative distance adjustment parameter p is determined by the following equation using the rectangular area S).

もし、上記の式(1)により算出したｐの値が負となった場合はｐ＝０とする。ここで、αは調整のためのパラメータ定数であり、想定されるＳ，ｃにおいて、ｐの値が概ね１〜２の値となるように決定することが望ましい。このαの決定方法としては、例えば、標準的な都市において２点間を選択した場合に、本装置により算出した道のりと実際の道のりが一致するように調整することが可能である。

If the value of p calculated by the above equation (1) becomes negative, p = 0. Here, α is a parameter constant for adjustment, and it is desirable to determine the value of p to be approximately 1 to 2 in assumed S and c. As a method for determining α, for example, when two points are selected in a standard city, it is possible to adjust the distance calculated by this apparatus so that the actual distance matches.

Step 4) The path estimation unit 3 uses the coordinates (x ₁ , y ₁ ), (x ₂ , y ₂ ) of the two points input to the apparatus and the distance adjustment parameter p determined by the distance adjustment parameter determination unit 2. Using the following formula (2), the path is estimated and output.

ここで、βは事前に設定したパラメータ定数である。特に、ｐ＝０の場合は、２点間のｘ座標が同じか否か、および、ｙ座標が同じか否かによって場合分けされる。すなわち、２点が完全に一致であれば、０、ｘ座標とｙ座標のうち、いずれか１つが異なればβ、ｘ座標、ｙ座標ともに異なれば、β×２である。

Here, β is a parameter constant set in advance. In particular, when p = 0, the case is divided depending on whether the x coordinate between two points is the same, and whether the y coordinate is the same . That is, if two points are completely coincident, 0, β if any one of x coordinate and y coordinate is different, and β × 2 if both x coordinate and y coordinate are different.

  As described above, in the present invention, for example, in the mesh-intersection number database 4, when the total number of meshes is 10,000 after having a configuration without a mesh range, Only 100,000 bits are required, and the distance between two points can be estimated at high speed.

  It is possible to construct the operation of each component of the route estimation apparatus of FIG. 1 as a program and install it on a computer used as the route estimation device, or distribute it via a network. .

  The present invention is not limited to the above-described embodiments, and various modifications and applications can be made within the scope of the claims.

DESCRIPTION OF SYMBOLS 1 In-rectangular mesh information acquisition part 2 Distance adjustment parameter determination part 3 Path estimation part 4 Mesh-intersection number database

Claims (2)

A path estimation device for estimating a path between two input points roughly,
Storage means for storing the number of intersections or total road distance representing the degree of freedom of route selection in mesh units;
Mesh acquisition means for acquiring a mesh included in a rectangle whose diagonal is a line connecting the two input points, from the storage means;
A parameter for calculating a parameter p that obtains the sum c of the obtained numerical values of degrees of freedom of the mesh and the area S of the rectangle, and increases as the area S is smaller and as the sum of numerical values c of the degrees of freedom increases. A calculation means;
Using the parameter p,

(Where β is a parameter constant set in advance, and x ₁ , x ₂ , y ₁ and y ₂ are the coordinates of the two input points)
An estimation means for estimating the distance between the two input points using the equation:
A road estimation apparatus characterized by comprising: Computer
A route estimation program that functions as each means of the route estimation device according to claim 1 .

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