WO2021232278A1 - Procédé et appareil d'acquisition de carte, dispositif informatique et support de stockage - Google Patents

Procédé et appareil d'acquisition de carte, dispositif informatique et support de stockage Download PDF

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Publication number
WO2021232278A1
WO2021232278A1 PCT/CN2020/091234 CN2020091234W WO2021232278A1 WO 2021232278 A1 WO2021232278 A1 WO 2021232278A1 CN 2020091234 W CN2020091234 W CN 2020091234W WO 2021232278 A1 WO2021232278 A1 WO 2021232278A1
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WO
WIPO (PCT)
Prior art keywords
map
grid
longitude
point
location information
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PCT/CN2020/091234
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English (en)
Chinese (zh)
Inventor
朱圣奇
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深圳元戎启行科技有限公司
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Application filed by 深圳元戎启行科技有限公司 filed Critical 深圳元戎启行科技有限公司
Priority to CN202080007603.8A priority Critical patent/CN113272798A/zh
Priority to PCT/CN2020/091234 priority patent/WO2021232278A1/fr
Publication of WO2021232278A1 publication Critical patent/WO2021232278A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
    • G06F16/29—Geographical information databases
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
    • G06F16/24—Querying
    • G06F16/245—Query processing

Definitions

  • a method for acquiring a map comprising:
  • the generating a grid point identifier corresponding to the geographic location information of each grid point according to the geographic location information of each grid point and the map type includes: Extract the longitude information of each grid point from the geographic location information of each grid point, select the longitude grid corresponding to each grid point from the preset longitude grid according to the longitude information, and Obtain the center longitude of the longitude grid and the longitude grid identifier corresponding to the longitude grid; obtain the local coordinates of each grid point in the local coordinate system with the center longitude of the longitude grid as the projection origin Coordinates; obtain the longitude grid coordinate identifier corresponding to the local coordinates, and the preset map type identifier corresponding to the map type; based on the longitude grid coordinate identifier, the longitude grid identifier, and the map type identifier Generate the grid point identifier.
  • the obtaining the longitude grid coordinate identifier corresponding to the local coordinate includes: obtaining a preset grid coordinate conversion coefficient; determining the grid coordinate conversion coefficient according to the local coordinate and the grid coordinate conversion coefficient. Longitude grid coordinate identification.
  • An identification acquisition module configured to generate a grid point identification corresponding to the geographic location information of each grid point according to the geographic location information of each grid point and the map type;
  • a computer device includes a memory and a processor, the memory stores a computer program, and the processor implements the steps of the foregoing method when the computer program is executed.
  • FIG. 4 is a schematic diagram of a process of querying a map database by using the grid point identifier to obtain geographic location information of each map data point in the map grid in an embodiment
  • Figure 10 is a schematic diagram of a map query conversion process in an application example
  • Fig. 11 is a structural block diagram of a map acquiring device in an embodiment
  • Fig. 12 is a diagram of the internal structure of a computer device in an embodiment.
  • the map to be acquired is a map that the map acquisition device 101 needs to output
  • the reference point on the map to be acquired is one of the standard points on the map for reference, for example, it can be the center point on the map to be acquired, or it can be
  • the size information of the map to be obtained is the size of the map that needs to be obtained, including basic information such as the length, width, and height of the map
  • the map type can include a variety of autopilot map types, such as: point cloud map, Intensity map and grid map etc.
  • the map acquiring device 101 can acquire the geographic location information of the reference point on the map to be acquired, the size information of the map to be acquired, and the map type of the map to be acquired.
  • the grid point may be a point randomly selected in the generated map grid, for example, the midpoint of each grid point or a certain end point of the map grid may be selected.
  • the map acquiring device 101 may divide the map to be acquired into multiple grids according to the map reference points and the size of the map.
  • the reference point may be selected as the center point of the map to be acquired, and the map acquiring device 101 may obtain the boundary and the coverage area of the map to be acquired according to the center point and the size of the map.
  • the specific size of each grid can be fixed, triggered from an endpoint of the map to be acquired, and the coverage area of the map to be acquired can be divided according to the fixed grid size.
  • step S204 the map acquiring device 101 generates a grid point identifier corresponding to the geographic location information of each grid point according to the geographic location information of each grid point and the map type.
  • the map acquisition device 101 acquires the geographic location information of the reference point on the map to be acquired, the size information of the map to be acquired, and the map type of the map to be acquired; the reference is acquired according to the geographic location information of the reference point and the map type The corresponding coordinates of the point on the map to be acquired; based on the coordinates and size information, multiple map grids covering the map to be acquired are generated, and the geographic location information of each grid point in the multiple map grids is acquired; according to each grid point Generate the grid point identification corresponding to the geographic location information of each grid point; use the grid point identification to query the map database 102 to obtain the geographic location information of the map data points in the map grid; The map database 102 stores the grid point identifiers and the corresponding relationships of the map data points in the map grid corresponding to the grid point identifiers; the map is obtained according to the geographic location information of the map data points and the map type.
  • the longitude information of the grid points is the longitude coordinates of the grid points
  • the longitude grid refers to the global map divided by longitude.
  • the global map can be divided into 360 longitude grids according to the degrees of longitude.
  • the identifier is used to identify the longitude grid, which can be the current longitude degree
  • the center longitude of the grid is the longitude of the center point of the longitude grid.
  • the center longitude can be obtained by the current longitude degree + 0.5.
  • the map acquisition device 101 After the map acquisition device 101 determines the center longitude corresponding to each grid point, it can construct a local coordinate system with each center longitude as the projection origin, and convert the geographic location information of each grid point into a local coordinate system through a coordinate conversion formula The corresponding local coordinates in.
  • step S304 the map acquiring device 101 generates a grid point identifier based on the longitude grid coordinate identifier, the longitude grid identifier, and the map type identifier.
  • the second local coordinate system is a standard local coordinate system
  • the coordinate system is a local coordinate system formed by the center longitude of the preset longitude grid as the projection origin.
  • the map data point identification is analyzed to obtain the center longitude of the longitude grid corresponding to the map data point, and the second local coordinate system is established with the center longitude as the projection origin, so as to obtain the second local coordinates of the map data point.
  • the local coordinate system includes a universal transverse Mercator grid system coordinate system.
  • the Universal Transverse Mercator Grid System (UNIVERSAL TRANSVERSE MERCARTOR GRID SYSTEM) coordinate system, that is, the UTM coordinate system, is a flat rectangular coordinate.
  • This coordinate grid system and the projection on which it is based have been widely used in topographic maps.
  • the UTM coordinate system is selected as the local coordinate system, which can realize accurate positioning of map data points and improve the accuracy of map acquisition by the map acquisition device 101.
  • step S602 the map acquiring device 101 acquires the coordinates of the reference point on the map to be acquired according to the geographic location information of the reference point and the map type; based on the coordinates and size information, generates multiple map grids covering the map to be acquired, and acquires Geographical location information of each grid point in all multiple map grids;
  • step S607 the map acquiring device 101 determines the geographic location information of the data points of the map according to the local coordinates of the data points of the map;
  • the grid point identifier is introduced to query the map database 102 that stores the correspondence between the grid point identifier and the map data point in the grid corresponding to the grid point identifier to obtain the location information of the map data points, namely Maps can be generated, and there is no need to manually select the database corresponding to the driving area to obtain the corresponding partial map, which is beneficial to improve the efficiency of obtaining the partial map.
  • the versatility of the grid point identifier generation process is improved by setting the conversion coefficient, and the map database 102 is queried through the grid point identifier, so as to efficiently obtain the geographic location information of the map data points.
  • Step S801 input the key.
  • Step S802 Analyze the x grid id, y grid id, longitude grid id and map data type through the key:
  • the low-order binary is a negative number, it will affect the high-order when it is added.
  • the y grid id is -1, it is 64 1s in binary storage, and the number of digits it occupies is only 0 to 24 digits. It will add 1 to 25 to 63 digits, so we must start from the lowest
  • the value of the bit is analyzed, and then the value of the low bit is subtracted to eliminate the impact on the high bit.
  • the map point information acquisition module 1105 is further configured to query the map database according to the grid point identifiers, and determine the local coordinates of the map data points in the map grid corresponding to the grid point identifiers; according to the map data The local coordinates of the points determine the geographic location information of the data points in the map.
  • FIG. 12 is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied.
  • the specific computer device may Including more or fewer parts than shown in the figure, or combining some parts, or having a different arrangement of parts.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Databases & Information Systems (AREA)
  • Data Mining & Analysis (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computational Linguistics (AREA)
  • Remote Sensing (AREA)
  • Information Retrieval, Db Structures And Fs Structures Therefor (AREA)

Abstract

La présente invention concerne un procédé et un appareil d'acquisition de carte, un dispositif informatique et un support de stockage. Ledit procédé consiste à : acquérir des informations d'emplacement géographique d'un point de référence sur une carte à acquérir, des informations de taille de ladite carte et un type de carte de ladite carte (S201) ; en fonction des informations d'emplacement géographique du point de référence et du type de carte, acquérir des coordonnées correspondantes du point de référence sur ladite carte (S202) ; sur la base des coordonnées et des informations de taille, générer une pluralité de grilles de carte couvrant ladite carte, et acquérir des informations d'emplacement géographique de tous les points de grille dans la pluralité de grilles de carte (S203) ; en fonction des informations d'emplacement géographique de tous les points de grille et du type de carte, générer des identifiants de point de grille correspondant aux informations d'emplacement géographique de tous les points de grille (S204) ; interroger une base de données de cartes en utilisant les identifiants de point de grille, et acquérir des informations d'emplacement géographique de tous les points de données de carte dans les grilles de carte (S205) ; et acquérir la carte en fonction des informations d'emplacement géographique de tous les points de données de carte et du type de carte (S206). Grâce audit procédé, une carte locale correspondante peut être acquise sans sélectionner manuellement une base de données correspondant à une région de conduite, ce qui permet d'améliorer l'efficacité d'acquisition d'une carte locale.
PCT/CN2020/091234 2020-05-20 2020-05-20 Procédé et appareil d'acquisition de carte, dispositif informatique et support de stockage WO2021232278A1 (fr)

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CN202080007603.8A CN113272798A (zh) 2020-05-20 2020-05-20 地图获取方法、装置、计算机设备和存储介质
PCT/CN2020/091234 WO2021232278A1 (fr) 2020-05-20 2020-05-20 Procédé et appareil d'acquisition de carte, dispositif informatique et support de stockage

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CN115661852A (zh) * 2022-11-03 2023-01-31 北京大学重庆大数据研究院 地图分割方法、装置、计算机可读存储介质及处理器

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