WO2009107167A1 - 地図描画装置 - Google Patents
地図描画装置 Download PDFInfo
- Publication number
- WO2009107167A1 WO2009107167A1 PCT/JP2008/000368 JP2008000368W WO2009107167A1 WO 2009107167 A1 WO2009107167 A1 WO 2009107167A1 JP 2008000368 W JP2008000368 W JP 2008000368W WO 2009107167 A1 WO2009107167 A1 WO 2009107167A1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B29/00—Maps; Plans; Charts; Diagrams, e.g. route diagram
- G09B29/10—Map spot or coordinate position indicators; Map reading aids
- G09B29/106—Map spot or coordinate position indicators; Map reading aids using electronic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
Definitions
- the present invention relates to a map drawing device used for an in-vehicle navigation system or the like.
- the in-vehicle navigation system supports comfortable driving by displaying a map and route guidance information on the display screen.
- the map data handled by the navigation system is created for each rectangular area (hereinafter, this area is referred to as a parcel) obtained by dividing the map at equal intervals in the longitude direction and the latitude direction.
- a map file in which each parcel is converted into digital data is stored in the storage device of the navigation system, and the map drawing device reads the map file from the storage device and creates map data.
- Patent Document 1 discloses a conventional technique for efficiently managing a map file.
- a map file in which a road network included in a parcel is expressed by a node record and a link record is handled.
- the node record information related to a non-adjacent node representing an intersection on the road network or information related to an adjacent node defining a road connection relationship between adjacent parcels is recorded.
- the terminal device disclosed in Patent Document 1 obtains coordinate information of each adjacent node between adjacent parcels using the node record and link record in the map file. Thereafter, the terminal device creates route data by following the connection from the road in one parcel to the road in the other parcel based on the obtained coordinate information of the adjacent node.
- map data is created in units of parcels, but route data handled by the in-vehicle navigation system is created independently of parcels. For this reason, when route data straddles a plurality of parcels, route connection between adjacent parcels cannot be guaranteed, and there is a possibility that a route cannot be drawn appropriately.
- the present invention has been made to solve the above-described problems, and obtains a map drawing apparatus that can reduce the load required for drawing a route across a plurality of parcels and can improve the drawing speed. For the purpose.
- a map drawing apparatus includes a map data storage unit that stores road data that defines a point sequence representing a road by coordinates in each region obtained by dividing a map into a plurality of links, and a link sequence connected between two points
- a link data creation unit that creates link data that prescribes link points, and whether or not a point sequence representing each road is connected based on the road data of each road corresponding to the link of the link data, and points that are connected to each other in this link
- a drawing data creation unit that creates link drawing data defining a column, a drawing data storage unit that stores link drawing data, and a link drawing read from the drawing data storage unit when drawing a map in each area unit
- a drawing processing unit for drawing a road corresponding to the link on the map based on the data.
- the presence or absence of connection between the point sequences representing each road corresponding to the link is determined, Link drawing data defining points connected to each other in the link is created, and a road corresponding to the link is drawn on the map based on the link drawing data.
- FIG. 1 It is a block diagram which shows the structure of the map drawing apparatus by Embodiment 1 of this invention. It is a flowchart which shows the flow of operation
- 3 is a flowchart showing a flow of processing for creating route drawing data according to the first embodiment.
- 6 is a diagram illustrating an example of route drawing data according to Embodiment 1.
- FIG. 1 It is a block diagram which shows the structure of the map drawing apparatus by Embodiment 1 of this invention. It is a flowchart which shows the flow of operation
- FIG. 1 is a block diagram showing a configuration of a map drawing apparatus according to Embodiment 1 of the present invention.
- the map drawing apparatus according to Embodiment 1 includes a drawing control unit 1, a drawing data creation unit 2, a route search unit (link data creation unit) 3, a drawing processing unit 4, a route data storage unit 5, a map database ( DB) (map data storage unit) 6 and drawing data storage unit 7.
- the drawing control unit 1 When the drawing control unit 1 receives a drawing area change command that is generated based on information relating to a map display input from a user via an input device (not shown), the drawing control unit 1 performs drawing according to the drawing area change command. A data creation command is created and transmitted to the drawing data creation unit 2 to control drawing data creation by the drawing data creation unit 2. Further, the drawing control unit 1 transmits the drawing command to the drawing processing unit 4, thereby controlling the drawing processing unit 4 to perform the drawing processing with the drawing data corresponding to the drawing command.
- the drawing area change command is a command for designating a drawing area in which the drawing data creation unit 2 creates drawing data.
- map data corresponding to the changed drawing area designated by the drawing area change command is read from the map DB 6.
- the map data is data constituting a map to be drawn, and road data that defines roads on the map, background data that defines the background of the map, symbols that define points such as landmarks on the map, etc. It consists of data.
- the drawing data creation command is a command for creating drawing data of the drawing area specified by the drawing area change command, and includes, for example, information for specifying a parcel corresponding to the drawing area.
- the drawing data is data used when drawing a map to be displayed, such as a coordinate point sequence of a road to be drawn, data indicating coordinates for displaying symbols and a symbol type, and the like.
- the drawing command is a command for designating map drawing data to be displayed on a display screen of a display device (not shown).
- the drawing data creation unit 2 acquires route data corresponding to the drawing area designated by the drawing data creation command from the drawing control unit 1 from the route data storage unit 5 and maps the map data of the designated drawing region to the map. Drawing data obtained from the DB 6 and corresponding to the route data and the map data are created. The created drawing data is registered in the drawing data storage unit 7 by the drawing data creation unit 2.
- map DB 6 includes map data including information that defines a node representing a point on a road such as a break or intersection that approximates a road with a broken line, and a link that represents a route length and an attribute of a road connecting two points. Register with.
- the route search unit 3 dynamically searches the map DB 6 for nodes and links on the route connecting the departure point and the destination, and from the departure point to the destination.
- the route data is registered in the route data storage unit 5 as route data of the route going to.
- the route data registered in the route data storage unit 5 is represented by a set of links (link string) that links the departure point and the destination created independently of the parcel.
- the drawing processing unit 4 acquires drawing data of a drawing area designated by a drawing command from the drawing control unit 1 from the drawing data storage unit 7 and uses the acquired drawing data on a display screen of a display device (not shown). Draw a map to be displayed. Note that the drawing processing by the drawing processing unit 4 is performed in units of parcels.
- the route data storage unit 5 stores route data expressed by a set of links from the departure point to the destination regardless of the map data parcel. That is, the route data stored in the route data storage unit 5 does not have information indicating the correspondence with the parcel.
- the map DB 6 is a database that stores map data divided in parcel units, and map data can be specified and read with information indicating parcels.
- the drawing data storage unit 7 stores drawing data associated with each parcel.
- the route data storage unit 5, the map database (DB) 6, and the drawing data storage unit 7 can be constructed on a storage area of a hard disk device that is standardly mounted on the computer. In addition, it may be constructed on a storage device of another computer capable of data communication with the computer.
- FIG. 2 is a flowchart showing the flow of operations performed by the map drawing apparatus in FIG. 1, and the details of the map drawing process will be described with reference to this figure.
- the drawing control unit 1 receives a drawing area change command regarding a map display input from a user via an input device (not shown)
- the drawing control unit 1 sends a drawing data creation command for designating a drawing area corresponding to the drawing area change command to the drawing data.
- the drawing data creation unit 2 acquires route data including links corresponding to the coordinates in the drawing area designated by the drawing data creation command from the route data storage unit 5 (step ST1).
- FIG. 3 is a diagram illustrating an example of route data.
- the route data acquired in step ST1 is created regardless of the parcel 8. For this reason, there is a case where one link straddles a plurality of parcels 8 like the link (Link 5) shown in FIG. Moreover, like a link (Link6), one link may return to the original parcel after passing through an adjacent parcel.
- the drawing data creation unit 2 acquires map data corresponding to the drawing area designated by the drawing data creation command from the map DB 6 (step ST2).
- the map data is statically created in advance for each parcel.
- the map data (road data) corresponding to the route data acquired from the route data storage unit 5 designates a link constituting the route data, accesses the map DB 6, and reads the road data corresponding to the link data. .
- FIG. 4 is a diagram illustrating an example of road data corresponding to route data, and shows road data corresponding to one link constituting the route data.
- each of road data Road 1, 2, 3,... represents one road data.
- the coordinates (x, y) indicate the coordinate value of the point sequence that constitutes the road data (the coordinate value in the parcel that constitutes the drawing area).
- Each road data Load 1, 2, 3,... Holds coordinate data of a point sequence representing a road (see coordinate values (x, y) in FIG. 4).
- the drawing data creation unit 2 creates drawing data from the map data acquired in step ST2 and registers it in the drawing data storage unit 7 (step ST3).
- the creation of the drawing data is performed in units of parcels.
- route drawing data hereinafter referred to as route drawing data
- link drawing data link drawing data
- FIG. 5 is a diagram for explaining a problem when it is not possible to determine whether or not the coordinate point sequence constituting the route is connected.
- the route data in FIG. 3 is taken as an example.
- route drawing data representing an incorrect route b connecting the coordinates of two points on the boundary with an adjacent parcel instead of the route a in the parcel may be created.
- the drawing data creation unit 2 creates route drawing data that guarantees the connection of coordinate point sequences on the route in advance, so that even a route straddling adjacent parcels is correct. The route can be drawn easily, and the load during the drawing process is reduced.
- FIG. 6 is a flowchart showing a flow of a process for creating route drawing data according to the first embodiment.
- the drawing data creation unit 2 creates route drawing data for registering a coordinate point sequence of road data corresponding to the route data (step ST1a).
- the drawing data creation unit 2 reads out the coordinate point sequence of the road data corresponding to this link from the map DB 6 one by one and registers it in the route drawing data. (Step ST2a).
- the drawing data creation unit 2 determines whether or not the processing of all road data corresponding to this link has been completed (step ST3a). At this time, when there is unprocessed road data, the drawing data creation unit 2 reads out the coordinate point sequence of the next road data corresponding to this link from the map DB 6.
- the drawing data creation unit 2 compares the coordinate value of the start point of the road data newly read from the map DB 6 with the coordinate value of the end point of the road data registered in the route drawing data in step ST2a, and both road data. It is determined whether or not the road represented by is connected (step ST4a). Here, if the coordinate values of the start point and the end point match, the drawing data creation unit 2 determines that the roads of the both road data are connected, and returns to step ST2a to newly read the road. The coordinate point sequence of the data is continuously registered in the route drawing data created in step ST1a.
- the drawing data creation unit 2 creates a new coordinate point sequence for road data. Route drawing data is created (step ST5a). Subsequently, the drawing data creation unit 2 returns to step ST2a and registers the coordinate point sequence of the newly read road data in the route drawing data newly created in step ST5a.
- the drawing data creation unit 2 performs a coordinate point sequence of road data for the route drawing data newly created in step ST5a until it is determined in step ST4a that the road of the road data corresponding to the link is not connected. Register. This process is repeated for the number of roads corresponding to the link.
- step ST3a If it is determined in step ST3a that the processing of all road data has been completed, the drawing data creation unit 2 finishes creating the route drawing data for this link, and for all the links constituting the route data Then, the same processing as described above is repeated.
- FIG. 7 is a diagram showing an example of the route drawing data created by the processing in FIG. 6, and shows a case where the road data shown in FIG. 4 is registered for the route drawing data.
- the route drawing data 1 is registered with the point coordinates (x1, y1) to (x4, y4) of the road data Road1 and the point coordinates (x5, y5) of the road data Road2 in FIG.
- the point coordinates (x6, y6) of the road data Road2 and the point coordinates (x7, y7) and (x8, y8) of the road data Road3 are registered.
- route drawing data in which only coordinate point sequences connected to each other are created even when the road data parcels corresponding to the same link are different. Further, when a coordinate point sequence that is not connected to the coordinate point sequence registered in the route drawing data so far is extracted, the coordinate point sequence is registered in the newly created route drawing data. That is, when there is a portion that is not connected in the route, a plurality of route drawing data may be created for one link.
- the route drawing data according to the present invention is composed of simple coordinate point sequences connected to each other, and the connection of the coordinate point sequences in one route drawing data is guaranteed.
- the drawing data including the path drawing data created as described above is sent from the drawing data creation unit 2 to the drawing data storage unit 7 and cached.
- the drawing processing unit 4 acquires the drawing data of the drawing area designated by the drawing command from the drawing control unit 1 from the drawing data storage unit 7, and uses the acquired drawing data (not shown).
- a map is drawn on the display screen of the display device (step ST4).
- the drawing process is performed by determining an appropriate color, range, priority, etc. for each data, such as drawing the road line in blue so as to connect coordinate point sequences with a width of 10 pixels.
- the drawing processing unit 4 uses the route drawing data acquired from the drawing data storage unit 7. At this time, even if it is route drawing data straddling the parcel, since the connection of the coordinate point sequence in one route drawing data is guaranteed, the drawing processing unit 4 is unaware of the connection of the parcel boundary, A route can be drawn only by performing a drawing process so as to connect all the coordinate point sequences of the route drawing data.
- the map DB 6 is stored between the two points and the map DB 6 that stores the road data defining the point sequence representing the road by the coordinates in each parcel obtained by dividing the map into a plurality of parts.
- a route search unit 3 that creates route data that defines a link sequence, and the presence or absence of connection between point sequences representing each road based on the road data of each road corresponding to the link of the route data.
- a drawing processing unit 4 for drawing a road corresponding to the link on the map based on the route drawing data By constructing in this way, the drawing processing unit 4 also creates route drawing data across the parcels while ensuring that the coordinate point sequence in one route drawing data is connected. It is possible to draw a route by a simple process of simply performing a drawing process so as to connect all coordinate point sequences of route drawing data without being conscious of the connection of parcel boundaries. Thereby, the load required for the drawing process can be reduced and the drawing speed can be improved.
- route drawing data represented by only a sequence of points connected to each other is generated for the route data.
- the present invention is not limited to this.
- the present invention can be applied to any data expressed as link data such as a traffic jam road notified by VICS (Vehicle Information and Communication System) regulation information.
- VICS Vehicle Information and Communication System
- the map drawing device is suitable for an in-vehicle navigation system and the like because it can reduce the load required for drawing a route across a plurality of parcels and improve the drawing speed.
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Abstract
Description
実施の形態1.
図1は、この発明の実施の形態1による地図描画装置の構成を示すブロック図である。図1において、実施の形態1による地図描画装置は、描画制御部1、描画データ作成部2、経路探索部(リンクデータ作成部)3、描画処理部4、経路データ記憶部5、地図データベース(DB)(地図データ記憶部)6及び描画データ記憶部7を備える。
図2は、図1中の地図描画装置による動作の流れを示すフローチャートであり、この図に沿って地図描画処理の詳細を説明する。
描画制御部1は、不図示の入力装置を介してユーザから入力された地図表示に関する描画領域変更命令を受信すると、この描画領域変更命令に応じた描画領域を指定する描画データ作成命令を描画データ作成部2へ送信する。描画データ作成部2は、描画データ作成命令で指定された描画領域内の座標に対応するリンクからなる経路データを、経路データ記憶部5から取得する(ステップST1)。
このように構成することで、パーセルを跨る経路描画データについても、1つの経路描画データ内の座標点列は接続していることを保障して作成していることから、描画処理部4が、パーセルの境界の接続を意識することなく、経路描画データの座標点列を全て結ぶように描画処理を行うだけの単純な処理で経路の描画が可能である。これにより、描画処理に要する負荷を軽減でき、かつ描画速度の向上を図ることができる。
例えば、VICS(Vehicle Information and Communication System)の規制情報等で通知される渋滞道路のようにリンクデータとして表現されるデータであれば、本発明を適用することができる。
Claims (1)
- 地図を複数に分割した各領域内の座標で道路を表す点列を規定した道路データを記憶する地図データ記憶部と、
2地点間に接続されているリンク列を規定するリンクデータを作成するリンクデータ作成部と、
前記リンクデータのリンクに対応する各道路の道路データに基づいて前記各道路を表す点列間の接続有無を判定し、このリンクにおいて互いに接続する点列を規定したリンク描画用データを作成する描画データ作成部と、
前記リンク描画用データを記憶する描画データ記憶部と、
前記各領域単位で地図を描画するにあたり、前記描画データ記憶部から読み出したリンク描画用データに基づいて、前記リンクに対応する道路を地図上に描画する描画処理部とを備えた地図描画装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2008/000368 WO2009107167A1 (ja) | 2008-02-27 | 2008-02-27 | 地図描画装置 |
JP2010500451A JP5230723B2 (ja) | 2008-02-27 | 2008-02-27 | 地図描画装置 |
US12/919,685 US20110004640A1 (en) | 2008-02-27 | 2008-02-27 | Map drawing device |
CN2008801276308A CN101960259B (zh) | 2008-02-27 | 2008-02-27 | 地图描绘装置 |
EP08720282.6A EP2249125B1 (en) | 2008-02-27 | 2008-02-27 | Map drawing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2008/000368 WO2009107167A1 (ja) | 2008-02-27 | 2008-02-27 | 地図描画装置 |
Publications (1)
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WO2009107167A1 true WO2009107167A1 (ja) | 2009-09-03 |
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PCT/JP2008/000368 WO2009107167A1 (ja) | 2008-02-27 | 2008-02-27 | 地図描画装置 |
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US (1) | US20110004640A1 (ja) |
EP (1) | EP2249125B1 (ja) |
JP (1) | JP5230723B2 (ja) |
CN (1) | CN101960259B (ja) |
WO (1) | WO2009107167A1 (ja) |
Families Citing this family (2)
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CN103712628B (zh) * | 2014-01-03 | 2016-09-21 | 宇龙计算机通信科技(深圳)有限公司 | 导航路径描绘方法和终端 |
CN108563673B (zh) * | 2018-02-01 | 2022-03-08 | 中国铁路设计集团有限公司 | 一种在gis地图上嵌入铁路线位的方法 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2002357441A (ja) * | 2001-06-01 | 2002-12-13 | Navitime Japan Co Ltd | 経路表示端末、経路表示支援装置、経路表示システム |
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KR100443495B1 (ko) * | 1998-11-24 | 2004-08-09 | 마쯔시다덴기산교 가부시키가이샤 | 디지털 지도파일의 데이터구조 |
EP1852680A4 (en) * | 2005-01-19 | 2012-09-19 | Jvc Kenwood Corp | GUIDE ROUTE GENERATION DEVICE AND GUIDANCE ROUTE PRODUCTION METHOD |
WO2008044281A1 (fr) * | 2006-10-10 | 2008-04-17 | Pioneer Corporation | Dispositif, procédé et logiciel de recherche d'itinéraire, et support d'enregistrement |
-
2008
- 2008-02-27 JP JP2010500451A patent/JP5230723B2/ja active Active
- 2008-02-27 CN CN2008801276308A patent/CN101960259B/zh not_active Expired - Fee Related
- 2008-02-27 EP EP08720282.6A patent/EP2249125B1/en not_active Not-in-force
- 2008-02-27 US US12/919,685 patent/US20110004640A1/en not_active Abandoned
- 2008-02-27 WO PCT/JP2008/000368 patent/WO2009107167A1/ja active Application Filing
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2002357441A (ja) * | 2001-06-01 | 2002-12-13 | Navitime Japan Co Ltd | 経路表示端末、経路表示支援装置、経路表示システム |
Also Published As
Publication number | Publication date |
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US20110004640A1 (en) | 2011-01-06 |
CN101960259B (zh) | 2013-07-03 |
EP2249125A1 (en) | 2010-11-10 |
JP5230723B2 (ja) | 2013-07-10 |
EP2249125A4 (en) | 2015-06-17 |
EP2249125B1 (en) | 2017-06-07 |
JPWO2009107167A1 (ja) | 2011-06-23 |
CN101960259A (zh) | 2011-01-26 |
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