CN113449055A - Map retrieval method, system and related equipment - Google Patents
Map retrieval method, system and related equipment Download PDFInfo
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- CN113449055A CN113449055A CN202010450657.3A CN202010450657A CN113449055A CN 113449055 A CN113449055 A CN 113449055A CN 202010450657 A CN202010450657 A CN 202010450657A CN 113449055 A CN113449055 A CN 113449055A
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Abstract
The application relates to a map retrieval method, a map retrieval system and related equipment. The method comprises the following steps: acquiring Chinese characters input by a user; based on at least one Chinese character contained in the Chinese character, searching at least one address matched with the at least one Chinese character by utilizing a Chinese character index of a pre-established map database; displaying the at least one address for selection by a user; and acquiring selection information of the user on the at least one address, and displaying the selected address on a map based on the selection information. The scheme provided by the application can improve the adaptability and efficiency of retrieval, reduce the complexity of a retrieval algorithm and reduce the data volume of the map database.
Description
Technical Field
The present application relates to the field of information retrieval technologies, and in particular, to a map retrieval method, a map retrieval system, and a related device.
Background
With the development of society, electronic maps are applied more and more, users use electronic maps more and more to perform services such as traffic navigation, address retrieval and the like, and when the users use the electronic maps, electronic map software can perform retrieval in a database according to contents input by the users and display retrieval results to the users.
In the related art, an index is generally pre-established according to the chinese word, and a proper result can be quickly retrieved by using the index during retrieval, but the related art still has certain limitations, for example, when the input chinese character is not matched with the chinese word in the index, a proper retrieval result cannot be retrieved.
Disclosure of Invention
In order to overcome the problems in the related art, the map retrieval method, the map retrieval system and the related equipment are provided, and the map retrieval method, the map retrieval system and the related equipment can improve the adaptability and efficiency of retrieval, reduce the complexity of a retrieval algorithm and reduce the data volume of a map database.
The first aspect of the present application provides a map retrieval method, including:
acquiring Chinese characters input by a user;
based on at least one Chinese character contained in the Chinese character, searching at least one address matched with the at least one Chinese character by utilizing a Chinese character index of a pre-established map database;
displaying the at least one address for selection by a user;
and acquiring selection information of the user on the at least one address, and displaying the selected address on a map based on the selection information.
A second aspect of the present application provides a map retrieval system, including:
the input unit is used for acquiring Chinese characters input by a user;
the processing unit is used for searching at least one address matched with at least one Chinese character by utilizing a Chinese character index of a pre-established map database based on the at least one Chinese character contained in the Chinese character;
the display unit is used for displaying the at least one address for the user to select;
the input unit is further used for acquiring the selection information of the user on the at least one address;
the display unit is further configured to display the selected address on a map based on the selection information.
A third aspect of the present application provides an electronic device comprising:
a processor; and
a memory having executable code stored thereon, which when executed by the processor, causes the processor to perform the method as described above.
A fourth aspect of the present application provides a non-transitory machine-readable storage medium having stored thereon executable code, which when executed by a processor of an electronic device, causes the processor to perform a method as described above.
The technical scheme provided by the application can comprise the following beneficial effects: compared with the related technology, the map retrieval method provided by the embodiment utilizes the Chinese character index of the map database to retrieve the address matched with at least one Chinese character input by the user, and can improve the adaptability and efficiency of retrieval; the index database does not need to establish an NVC tree, the complexity of a retrieval algorithm is reduced, and the data volume of a map database is reduced.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The foregoing and other objects, features and advantages of the application will be apparent from the following more particular descriptions of exemplary embodiments of the application, as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the application.
Fig. 1 is a schematic flowchart of a map retrieval method according to an embodiment of the present application;
fig. 2 is another schematic flow chart of a map retrieval method according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a map retrieval system according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of an electronic device shown in an embodiment of the present application;
FIG. 5 is a schematic diagram of a NVC tree in the related art.
Detailed Description
Preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It is to be understood that, in the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the related art, for example, in some map software, for the retrieval of chinese addresses, it is common to perform Full Text Search (FTS) of words by using a pre-established chinese word index, for example, the pre-established chinese word index includes: the words related to Nanjing such as Nanjing, Nanjing station, Nanjing south station, Nanjing shopping mall, Nanjing center, Nanjing Yangtze river bridge and Nanjing Yangtze river hospital are input by a user, if the user inputs Nanjing, the words related to Nanjing can be searched by map software and are presented to the user for selection, but if the user inputs Nanjing length, the word which is the same as the word of Nanjing length is not in the index, the map software cannot search a matching result by the index, and the map software searching adaptability adopting the scheme is insufficient; moreover, based on the index database of the chinese word, generally, an NVC (Next Valid Character) tree as shown in fig. 5 needs to be established, which results in a complex algorithm and a large amount of data to be stored.
In view of the above problems, embodiments of the present application provide a map retrieval method, which can improve adaptability and efficiency of a map software retrieval address.
The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic flowchart of a map retrieval method according to an embodiment of the present application.
Referring to fig. 1, a map retrieval method provided in an embodiment of the present application includes:
s101, acquiring a Chinese character input by a user;
for example, the chinese characters input by the user through the keyboard, the touch screen, and the like may be obtained, and certainly, the chinese characters input by the user may also be obtained by using other devices, which is not limited specifically herein;
s102, based on at least one Chinese character contained in the Chinese character, utilizing a Chinese character index of a pre-established map database to search at least one address matched with the at least one Chinese character;
for example, if the user inputs "Nanjing Changjiang", the Chinese character includes three Chinese characters "Nanjing", "Beijing" and "Changlong", and addresses corresponding to the three Chinese characters are searched by using the Chinese character indexes, so that addresses such as "Nanjing Changjiang river bridge", "Nanjing Changjiang river hospital" and the like can be searched;
s103, displaying the at least one address for a user to select;
the retrieved address may be displayed to the user, but is not limited to, using a display device such as a display screen;
s104, acquiring selection information of the user on the at least one address, and displaying the selected address on a map based on the selection information;
when there are a plurality of matching addresses, the user may select one of them, and the selected address will be presented on the electronic map.
Compared with the related technology, the map retrieval method provided by the embodiment utilizes the Chinese character index of the map database to retrieve the address matched with at least one Chinese character input by the user, and can improve the adaptability and efficiency of retrieval; the NVC tree does not need to be established for the index database, the retrieval algorithm is simple, and the data volume of the database needing to be stored is small.
Fig. 2 is another schematic flow chart of a map retrieval method according to an embodiment of the present application.
Referring to fig. 2, a map retrieval method provided in another embodiment of the present application includes:
s200, establishing an index based on Chinese single characters of a map database;
different from the index establishment based on Chinese words in the related technology, the index establishment based on Chinese words in the embodiment does not need to establish an NVC tree;
the specific mode for establishing the index based on the Chinese single character can be established by local equipment or obtained from a network server;
s201, acquiring Chinese characters input by a user;
for example, the chinese characters input by the user through the keyboard, the touch screen, and the like may be obtained, and certainly, the chinese characters input by the user may also be obtained by using other devices, which is not limited specifically herein;
s202, splitting the Chinese character into at least one Chinese single character;
when the Chinese character of the user comprises a plurality of Chinese single characters, the Chinese character can be split into the Chinese single characters, for example, when the user inputs 'Nanjing long', the Chinese character is split into three Chinese single characters of 'Nanjing', 'Jingjing' and 'long';
for example, it is possible to perform word segmentation of chinese characters by using, but not limited to, ICU word segmenter (a segmenter suitable for asian language provided by elastic search) or standard word segmenter;
s203, based on at least one Chinese character contained in the Chinese character, utilizing a Chinese character index of a pre-established map database to search at least one address matched with the at least one Chinese character;
for example, if the user inputs "Nanjing Changjiang", the Chinese character is divided into three Chinese characters, i.e., "Nanjing", "Beijing" and "Changlong", and addresses corresponding to the three Chinese characters are searched by using the Chinese character index, so that addresses such as "Nanjing Changjiang river bridge", "Nanjing Changjiang river hospital" and the like can be searched;
preferably, when the Chinese character input by the user comprises a plurality of Chinese single characters, the address matched with each Chinese single character is preferentially matched;
preferably, the search algorithm can also support fuzzy search, that is, when the Chinese character input by the user includes N Chinese single characters, the address capable of being matched with N-M Chinese single characters in the N Chinese single characters is output as a search result, wherein M is a positive integer smaller than N, and it can be understood that the smaller the value of M, the higher the matching degree of the searched address and the Chinese character input by the user is;
s204, displaying the at least one address for a user to select;
the retrieved address may be displayed to the user, but is not limited to, using a display device such as a display screen;
preferably, if a plurality of addresses are retrieved, the plurality of addresses may be sorted according to a preset rule, and then the sorted addresses are displayed;
for example, the at least one address is sorted based on the historical use frequency of the user of each address, the software may record the historical use record of the user, and the address with higher historical use frequency of the user may be arranged in the front;
for example, the addresses may be sorted based on their distance from the current address, and the addresses closer together may be ranked in the top;
for example, the addresses may be sorted based on the matching degree between each address and the at least one Chinese character, and the addresses with higher matching degree may be arranged in the front;
preferably, multiple factors may also be considered simultaneously, that is, based on a predetermined ranking factor, the at least one address is weighted and calculated to obtain a ranking weight value of each address, the at least one address is ranked according to the ranking weight values from high to low, and the ranked at least one address is displayed for a user to select;
wherein the ranking factor comprises at least one of the following factors: the historical use frequency of the user, the distance between each address and the current address, the matching degree between each address and the at least one Chinese single character and the like; it should be noted that, the specific weight of each ranking factor may be preset, and is not specifically limited herein;
it should be noted that the ranking factors are not limited to the three listed above, and those skilled in the art can also select other suitable ranking factors according to practical situations, and are not specifically limited herein;
s205, acquiring selection information of the user on the at least one address, and displaying the selected address on a map based on the selection information;
when a plurality of matched addresses exist, the addresses can be displayed in a list form, and a user can select one of the addresses from the address list, and the selected address is displayed on the electronic map.
Preferably, the map database in the embodiment of the present application is an offline map database stored locally, and the map retrieval method in the embodiment of the present application is implemented based on the offline map database, has a faster response speed, is not affected by network conditions, and can adapt to more complex driving environments, such as tunnels, remote areas, and other conditions with poor network conditions.
Preferably, the method may further include: and updating the local offline map database when a preset updating condition is met.
Accordingly, after updating the offline map database, the Chinese word-based index of the map database may also be updated.
Preferably, before the above S203, the method may further include: acquiring a search area designated by a user;
accordingly, the S203 may include: and searching at least one address matched with at least one Chinese character in a search area designated by the user by utilizing a Chinese character index of a pre-established map database based on the at least one Chinese character contained in the Chinese character.
In this embodiment, in order to improve the search speed and accuracy, the user may specify a search area in advance, for example, when the destination address is "Nanjing Yangtze river bridge", the user may limit the search area to the Pukou area of Nanjing city, so that the search speed will be faster, and some irrelevant addresses may also be excluded.
Preferably, after the above S205, the method may further include: planning and displaying at least one driving path from the current address to the selected address; the specific path planning method may adopt a path planning method in the prior art, and is not described herein again.
Corresponding to the embodiment of the application function implementation method, the application also provides a map retrieval system, electronic equipment and a corresponding embodiment for implementing the map retrieval method.
Fig. 3 is a schematic structural diagram of a map retrieval system according to an embodiment of the present application.
The map retrieval system 300 includes:
an input unit 310 for acquiring a chinese character input by a user;
for example, the input unit 310 may be, but is not limited to, a keyboard, a touch screen, and other input devices;
a processing unit 320, configured to retrieve, based on at least one chinese word included in the chinese character, at least one address matching the at least one chinese word by using a chinese word index of a pre-established map database;
for example, the processing unit 320 may be, but is not limited to, a CPU (central processing unit), an MCU (micro processing unit), a single chip, and other data processing devices;
a display unit 330, configured to display the at least one address for user selection;
for example, the display unit 330 may be, but is not limited to, a display device such as a display screen;
the input unit 310 is further configured to obtain selection information of the at least one address from the user;
the display unit 330 is further configured to display the selected address on the map based on the selection information.
Preferably, the system 300 may further include an index establishing unit for establishing an index based on Chinese characters of the map database;
different from the index establishment based on Chinese words in the related technology, the index establishment based on Chinese words in the embodiment does not need to establish an NVC tree;
the specific mode for establishing the index based on the Chinese single character can be established by local equipment or obtained from a network server;
preferably, the processing unit 320 may be further configured to split the chinese character into at least one chinese single character;
when the Chinese character of the user comprises a plurality of Chinese single characters, the Chinese character can be split into the Chinese single characters, for example, when the user inputs 'Nanjing long', the Chinese character is split into three Chinese single characters of 'Nanjing', 'Jingjing' and 'long';
for example, it is possible to perform word segmentation of chinese characters by using, but not limited to, ICU word segmenter (a segmenter suitable for asian language provided by elastic search) or standard word segmenter;
preferably, the system 300 may further include: and the updating unit is used for updating the local offline map database when a preset updating condition is met.
Accordingly, after updating the offline map database, the updating unit may also update the chinese word-based index of the map database.
Preferably, the input unit may be further configured to acquire a search area specified by a user;
correspondingly, the processing unit is specifically configured to retrieve, based on at least one Chinese word included in the Chinese character, at least one address matching the at least one Chinese word in the search area specified by the user by using a Chinese word index of a pre-established map database.
In this embodiment, in order to improve the search speed and accuracy, the user may specify a search area in advance, for example, when the destination address is "Nanjing Yangtze river bridge", the user may limit the search area to the Pukou area of Nanjing city, so that the search speed will be faster, and some irrelevant addresses may also be excluded.
Preferably, the map retrieval system provided by the embodiment can be configured as a plug-in based on the map database, and the map retrieval system is realized in a plug-in mode, so that the development is simple and flexible, and the system maintenance and upgrade are more convenient.
With regard to the system in the above embodiment, the specific manner in which each unit performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated upon here.
Fig. 4 is a schematic structural diagram of an electronic device shown in an embodiment of the present application.
Referring to fig. 4, an electronic device 400 includes a memory 410 and a processor 420.
The Processor 420 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 410 may include various types of storage units, such as system memory, Read Only Memory (ROM), and permanent storage. Wherein the ROM may store static data or instructions that are needed by the processor 1020 or other modules of the computer. The persistent storage device may be a read-write storage device. The persistent storage may be a non-volatile storage device that does not lose stored instructions and data even after the computer is powered off. In some embodiments, the persistent storage device employs a mass storage device (e.g., magnetic or optical disk, flash memory) as the persistent storage device. In other embodiments, the permanent storage may be a removable storage device (e.g., floppy disk, optical drive). The system memory may be a read-write memory device or a volatile read-write memory device, such as a dynamic random access memory. The system memory may store instructions and data that some or all of the processors require at runtime. Further, the memory 410 may include any combination of computer-readable storage media, including various types of semiconductor memory chips (DRAM, SRAM, SDRAM, flash memory, programmable read-only memory), magnetic and/or optical disks, may also be employed. In some embodiments, memory 1010 may include a removable storage device that is readable and/or writable, such as a Compact Disc (CD), a read-only digital versatile disc (e.g., DVD-ROM, dual layer DVD-ROM), a read-only Blu-ray disc, an ultra-density optical disc, a flash memory card (e.g., SD card, min SD card, Micro-SD card, etc.), a magnetic floppy disc, or the like. Computer-readable storage media do not contain carrier waves or transitory electronic signals transmitted by wireless or wired means.
The memory 410 has stored thereon executable code that, when processed by the processor 420, may cause the processor 420 to perform some or all of the methods described above.
The aspects of the present application have been described in detail hereinabove with reference to the accompanying drawings. In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments. Those skilled in the art should also appreciate that the acts and modules referred to in the specification are not necessarily required in the present application. In addition, it can be understood that the steps in the method of the embodiment of the present application may be sequentially adjusted, combined, and deleted according to actual needs, and the modules in the device of the embodiment of the present application may be combined, divided, and deleted according to actual needs.
Furthermore, the method according to the present application may also be implemented as a computer program or computer program product comprising computer program code instructions for performing some or all of the steps of the above-described method of the present application.
Alternatively, the present application may also be embodied as a non-transitory machine-readable storage medium (or computer-readable storage medium, or machine-readable storage medium) having stored thereon executable code (or a computer program, or computer instruction code) which, when executed by a processor of an electronic device (or electronic device, server, etc.), causes the processor to perform part or all of the various steps of the above-described method according to the present application.
Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the applications disclosed herein may be implemented as electronic hardware, computer software, or combinations of both.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems and methods according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Having described embodiments of the present application, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (12)
1. A map retrieval method is characterized in that:
acquiring Chinese characters input by a user;
based on at least one Chinese character contained in the Chinese character, searching at least one address matched with the at least one Chinese character by utilizing a Chinese character index of a pre-established map database;
displaying the at least one address for selection by a user;
and acquiring selection information of the user on the at least one address, and displaying the selected address on a map based on the selection information.
2. The method of claim 1, wherein after said obtaining the user-entered chinese character, the method further comprises:
and splitting the Chinese character into the at least one Chinese single character.
3. The method of claim 1, wherein displaying the at least one address for selection by a user comprises:
and sorting the at least one address based on the historical use frequency of the user, and displaying the sorted at least one address for the user to select.
4. The method of claim 1, wherein displaying the at least one address for selection by a user comprises:
and sorting the at least one address based on the distance between each address and the current address, and displaying the sorted at least one address for the user to select.
5. The method of claim 1, wherein displaying the at least one address for selection by a user comprises:
and sequencing the at least one address based on the matching degree of each address and the at least one Chinese single character, and displaying the sequenced at least one address for the user to select.
6. The method of any of claims 3-5, wherein displaying the at least one address for selection by a user comprises:
based on a preset sorting factor, carrying out weighted calculation on the at least one address to obtain a sorting weight value of each address, sorting the at least one address according to the sorting weight value from high to low, and displaying the at least one address after sorting for a user to select;
wherein the ranking factor comprises at least one of the following factors: the historical use frequency of the user of each address, the distance between each address and the current address, and the matching degree of each address and the Chinese single character.
7. The method of any of claims 1-5, wherein prior to said obtaining the user-entered Chinese character, the method further comprises:
and establishing an index based on Chinese single characters of the map database.
8. The method according to claim 7, wherein the map database is an offline database.
9. The method of any of claims 1-5, wherein prior to the retrieving at least one address matching the at least one Chinese word using the Chinese word index of the pre-established map database, the method further comprises: acquiring a search area designated by a user;
the searching at least one address matched with the at least one Chinese word by utilizing the Chinese word index of the pre-established map database comprises the following steps: and retrieving at least one address matched with the at least one Chinese single character in the search area designated by the user.
10. A map retrieval system, the system comprising:
the input unit is used for acquiring Chinese characters input by a user;
the processing unit is used for searching at least one address matched with at least one Chinese character by utilizing a Chinese character index of a pre-established map database based on the at least one Chinese character contained in the Chinese character;
the display unit is used for displaying the at least one address for the user to select;
the input unit is further used for acquiring the selection information of the user on the at least one address;
the display unit is further configured to display the selected address on a map based on the selection information.
11. An electronic device, comprising:
a processor; and
a memory having executable code stored thereon, which when executed by the processor, causes the processor to perform the method of any one of claims 1-9.
12. A non-transitory machine-readable storage medium having stored thereon executable code, which when executed by a processor of an electronic device, causes the processor to perform the method of any one of claims 1-9.
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| CN202010450657.3A CN113449055A (en) | 2020-05-25 | 2020-05-25 | Map retrieval method, system and related equipment |
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| CN202010450657.3A CN113449055A (en) | 2020-05-25 | 2020-05-25 | Map retrieval method, system and related equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114491089A (en) * | 2022-01-28 | 2022-05-13 | 北京百度网讯科技有限公司 | Address acquisition method, device, electronic equipment and medium |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114491089A (en) * | 2022-01-28 | 2022-05-13 | 北京百度网讯科技有限公司 | Address acquisition method, device, electronic equipment and medium |
| CN114491089B (en) * | 2022-01-28 | 2023-08-29 | 北京百度网讯科技有限公司 | Address acquisition method, address acquisition device, electronic equipment and medium |
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