CN110136564B - Method for updating parking lot label display information in map in real time - Google Patents
Method for updating parking lot label display information in map in real time Download PDFInfo
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- CN110136564B CN110136564B CN201910507738.XA CN201910507738A CN110136564B CN 110136564 B CN110136564 B CN 110136564B CN 201910507738 A CN201910507738 A CN 201910507738A CN 110136564 B CN110136564 B CN 110136564B
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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
- G09B29/003—Maps
- G09B29/006—Representation of non-cartographic information on maps, e.g. population distribution, wind direction, radiation levels, air and sea routes
- G09B29/007—Representation of non-cartographic information on maps, e.g. population distribution, wind direction, radiation levels, air and sea routes using computer methods
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
- H04L67/025—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP] for remote control or remote monitoring of applications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/52—Network services specially adapted for the location of the user terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/55—Push-based network services
Abstract
The invention discloses a method for updating the mark display information of a parking lot in a map in real time, which establishes connection with a background server through an mqtt message system and sends a message subscription request to the background server, when data change occurs, the background server pushes message content to a web map page, the page firstly removes the original mark information of a mark point to be updated according to the message content and redraws updated data, thereby realizing the real-time updating of the information of the parking lot.
Description
Technical Field
The invention relates to the technical field of information processing, in particular to a method for updating the labeling display information of a parking lot in a map in real time.
Background
With the improvement of the social living standard, most people choose to drive by themselves when going out, and the parking problem is highlighted; for a parking lot operator, a plurality of parking lots are usually operated at the same time, and it is very urgent to know the current use condition of the operated parking lots in time; the method is beneficial for the operator to make positive adjustment on the planning of the parking lot.
The current parking lot is usually an intelligent parking system, an operator can acquire the use condition of parking places through a parking lot management platform, the management platform can present a current city map and marking information of the parking lot to which the current city map belongs, and the marking information comprises information such as the position of the parking lot, the name of the parking lot, the remaining parking places, the total parking places and the like; when an operator needs to check the real-time utilization condition of the parking lot, the current real-time utilization condition of the parking space of the parking lot can be displayed only by manual refreshing or timing refreshing, the focus of a page can be reset due to the integral refreshing of the page, the currently checked target position can be changed, the page can have obvious refreshing card pause feeling, and the use of a user is not facilitated; and the browser needs to send a request to the server, however, the HTTP request may contain a long header, wherein the data really valid may be only a small part, which obviously wastes much resources such as bandwidth.
Disclosure of Invention
The invention aims to overcome the defects in the background technology, and provides a method for updating the marked display information of a parking lot in a map in real time, which can realize the real-time updating of the remaining parking space data, reduce the waste of bandwidth of a browser request interface and avoid the phenomenon of page refreshing pause.
In order to achieve the technical effects, the invention adopts the following technical scheme:
a method for updating the labeling display information of a parking lot in a map in real time is characterized by comprising the following steps:
a, a web map page requests a background server interface to obtain a current parking lot marking point list needing marking and draws the parking lot marking point list on a map, and parking space remark information is arranged on each marking point;
establishing connection between a web map page and a background server through an mqtt protocol, wherein the web map page of each client has a unique identification id and a heartbeat parameter; the method can realize that the background server can distinguish the connected client side conveniently and avoid the condition that long connection is cut off due to overlong heartbeat time;
C. after the connection is successful, the web map page sets a subscription theme and sends a subscription message request to the background server, and the background server receives the subscription of the web map page;
D. when parking data in the parking lot changes, the parking data are reported to a background server to send a data change notification, the background server judges whether the parking space changes after receiving the data change notification, and sets a subscription theme and message content which are the same as those of a web map page and pushes the subscription theme and the message content to the web map page through message service only when the parking space changes;
e, after the web map page receives the push message, if the message subject is judged to be the request of the current page, analyzing the message content and entering the step F;
F. acquiring information of all marked points on a map, and judging whether the marked points needing to be updated exist currently or not according to the positions of the marked points;
G. if the marking point exists, removing the original parking space remark information and updating the information into the newly received parking space remark information, and if the marking point does not exist, ignoring the information.
Further, when the marking points are drawn on the map in the step a, the display colors of the marking points with the remaining number of the berths belonging to different ranges are different, so that the user can know the approximate use condition of the berths by looking at the colors of the marking points, and the quick acquisition of the information is realized.
Furthermore, the display color of the annotation points without the remaining berths is a color A such as red, the display color of the annotation points with the remaining berths smaller than 5 is a color B such as yellow, and the display color of the annotation points with the remaining berths larger than or equal to 5 is a color C such as green.
Further, in the step G, when the parking space remark information of the mark point is updated on the map, the display colors of the mark points are different according to different ranges to which the remaining number of parking spaces of the mark point belongs.
Further, the parking space remark information in the step A comprises a parking lot name, a remaining parking number and a total parking number, so that data which are most concerned by a user are visually displayed.
Further, in the step C, after the background server receives the subscription of the web map page, a tag connected to the web map page message is established, and the tag is matched with the subscription of the background server; the background server will send a message to each web map page that subscribes to the matched tag.
Further, the parking data in the step D at least includes longitude and latitude of the labeling point, a name of the parking lot, a remaining number of parking spaces, and a total number.
Furthermore, in the step G, for the mark point with updated parking space remark information, an update identifier is added to the parking space remark information, for example, a new character is added, so that the user can quickly obtain which mark points with updated information.
Compared with the prior art, the invention has the following beneficial effects:
the method for updating the mark display information of the parking lot in the map in real time comprises the steps of establishing connection with a background server through an mqtt message system, sending a message subscription request to the background server, pushing message content to a web map page by the background server when data change occurs, removing original mark information of a mark point needing to be updated according to the message content by the page, and redrawing updated data, so that real-time updating of the information of the parking lot is achieved, meanwhile, the problems that the focus is lost and the page is stuck because the whole page needs to be redrawn when the current page is refreshed are solved, and the experience of a user is improved.
Drawings
Fig. 1 is a schematic flow chart of a method for updating the parking lot annotation display information in the map in real time according to the present invention.
Fig. 2 is a schematic implementation diagram of the method for updating the parking lot annotation display information in the map in real time according to the present invention.
FIG. 3 is a schematic diagram of an initial presentation of a web map page in an embodiment of the invention.
FIG. 4 is a schematic diagram of an updated web map page in an embodiment of the invention.
Detailed Description
The invention will be further elucidated and described with reference to the embodiments of the invention described hereinafter.
Example (b):
the first embodiment is as follows:
as shown in fig. 1 and fig. 2, a method for updating the parking lot labeling display information in a map in real time includes the following steps:
the method comprises the following steps: a web map page requests a background server interface to obtain a current parking lot marking point list needing marking and draws the parking lot marking point list on a map, and parking space remark information is arranged on each marking point; preferably, in this embodiment, the parking space remark information includes a name of the parking lot, a remaining parking space number and a total parking space number, and as shown in fig. 3 specifically, the display colors of the marking points where the remaining parking space number belongs to different ranges are different, so that the user can know about the use condition of the parking space by looking at the colors of the marking points, thereby achieving quick acquisition of the information.
Preferably, in this embodiment, the display color of the annotation point without the remaining berths is red, the display color of the annotation point with the remaining berths smaller than 5 is yellow, and the display color of the annotation point with the remaining berths greater than or equal to 5 is green.
Step two: the web map page establishes connection with a background server through an mqtt protocol, receives a connection state fed back by the background server, and initiates a subscription request if the connection is successful, wherein the web map page of each client has a unique identification id and a unique heartbeat parameter; the method and the system can realize that the background server can distinguish the connected client side conveniently and smoothly on the one hand, and avoid the condition that long connection is cut off due to overlong heartbeat time on the other hand.
Step three: after the connection is successful, the web map page sets a subscription theme and sends a subscription message request to the background server, and the background server receives the subscription of the web map page; specifically, after receiving the subscription of the web map page, the background server establishes a tag connected to the web map page message, and the tag is matched with the subscription of the background server; the background server will send a message to each web map page that subscribes to the matched tag.
Step four: when parking data in the parking lot changes, the data change notification is sent by the reporting background server, the background server judges whether the parking space changes after receiving the data change notification, and only when the parking space changes, the subscription theme and the message content which are the same as those of the web map page are set and pushed to the web map page through the message service. In this embodiment, the parking data at least includes the longitude and latitude of the labeling point, the name of the parking lot, the remaining number of parking spaces, the total amount, the charging condition, the information of the toll collector, and the like.
Step five: after the web map page receives the push message, if the message subject is judged to be the request of the current page, analyzing the message content and entering a sixth step; in this embodiment, the information obtained by the analysis at least includes the longitude and latitude of the annotation point, the name of the parking lot, the remaining number of parking spaces, and the total information content obtained by the analysis in this embodiment is: [ { "longitudinal": 104.001076, "latitude":30.701809, "supplus": 0, "parkName": parking lot 1, "" total ":3} {" longitudinal ":104.085589," latitude ":30.718203," supplus ":3," parkName ": 2," "total":5} ].
Step six: acquiring information of all marked points on a map, and judging whether the marked points needing to be updated exist currently or not according to the positions of the marked points; namely, whether the currently updated annotation point exists is determined by comparing whether the longitude and latitude of the currently updated annotation point is the same as the longitude and latitude of the currently existing annotation point.
Step seven: if the mark point exists, removing the original parking space remark information and updating the mark point to the newly received parking space remark information, if the mark point does not exist, ignoring the mark point, and updating the parking space remark information of the mark point on the map according to different ranges to which the remaining parking space number of the mark point belongs, wherein the display colors of the mark point are different.
According to the method for updating the mark display information of the parking lot in the map in real time, the connection is established with the background server through the mqtt message system, the message subscription request is sent to the background server, when data change occurs, the background server pushes the message content to the web map page, the page firstly removes the original mark information of the mark point to be updated according to the message content, and redraws the updated data, so that the real-time updating of the information of the parking lot is realized, meanwhile, the problems of focus loss and page blockage caused by the fact that the whole page needs to be redrawn when the current page is refreshed are solved, and the experience of a user is favorably improved.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (8)
1. A method for updating the labeling display information of a parking lot in a map in real time is characterized by comprising the following steps:
a, a web map page requests a background server interface to obtain a current parking lot marking point list needing marking and draws the parking lot marking point list on a map, and parking space remark information is arranged on each marking point;
establishing connection between a web map page and a background server through an mqtt protocol, wherein the web map page of each client has a unique identification id and a heartbeat parameter;
C. after the connection is successful, the web map page sets a subscription theme and sends a subscription message request to the background server, and the background server receives the subscription of the web map page;
D. when parking data in the parking lot changes, the parking data are reported to a background server to send a data change notification, the background server judges whether the parking space changes after receiving the data change notification, and sets a subscription theme and message content which are the same as those of a web map page and pushes the subscription theme and the message content to the web map page through message service only when the parking space changes;
e, after the web map page receives the push message, if the message subject is judged to be the request of the current page, analyzing the message content and entering the step F;
F. acquiring information of all the marking points on the map, and determining whether the marking points needing to be updated exist or not by comparing whether the longitude and latitude of the marking points needing to be updated currently are the same as the longitude and latitude of the existing marking points currently;
G. if the marking point exists, removing the original parking space remark information of the marking point and updating the information into newly received parking space remark information, and if the information does not exist, ignoring the information.
2. The method for updating the labeling display information of the parking lot in the map in real time as claimed in claim 1, wherein when the labeling points are drawn on the map in the step a, the labeling points with the number of the remaining parking spaces belonging to different ranges have different display colors.
3. The method for updating the labeling display information of the parking lot in the map in real time as claimed in claim 2, wherein the display color of the labeling point without the remaining berths is color A, the display color of the labeling point with the remaining berths smaller than 5 is color B, and the display color of the labeling point with the remaining berths larger than or equal to 5 is color C.
4. The method for updating the marked display information of the parking lot in the map in real time as claimed in claim 2, wherein the display colors of the marked points are different according to different ranges to which the remaining number of parking spaces of the marked points belong when the parking space remark information of the marked points is updated on the map in the step G.
5. The method according to claim 1, wherein the parking space remark information in step a includes a name of a parking lot, a remaining number of parking spaces, and a total number of parking spaces.
6. The method for updating the parking lot annotation display information in the map in real time as claimed in claim 1, wherein in step C, after the background server receives the subscription of the web map page, a tag connected to the web map page message is established, and the tag is matched with the subscription of the background server; the background server will send a message to each web map page that subscribes to the matched tag.
7. The method according to claim 1, wherein the parking data in step D at least includes longitude and latitude of the labeling point, name of the parking lot, remaining number of parking spaces and total number of parking spaces.
8. The method according to any one of claims 1 to 7, wherein in step G, an update mark is added to the parking space remark information of the annotation point with the updated parking space remark information.
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| CN110784544A (en) * | 2019-10-31 | 2020-02-11 | 深圳易嘉恩科技有限公司 | Real-time monitoring method for urban roadside occupied parking operation resources |
| CN111488365B (en) * | 2019-11-20 | 2021-03-26 | 杭州海康威视系统技术有限公司 | Data updating method and device, electronic equipment and storage medium |
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