CN104573083A - Automatic map cache service updating method - Google Patents

Abstract

The invention discloses a method for automatically updating a map cache service, comprising: setting an automatic update identifier of a map service, managing identifier information, and recording corresponding service information; defining a map update process; constructing an update range of this cache update in a map cache update task; and Update level; determine whether the map automatically updates the cache; build a map cache update scheme template; build a map cache update tool; use the cache update tool to read the cache update template to form a new cache scheme; The acquired update range and update level are added to the map cache update tool as a cache task to trigger the execution of the map cache update. Beneficial effects of the invention: the cache update scheme is stored in the form of a template, which is convenient for users to modify twice; the map cache update mode is automatically triggered without manual intervention, and the cache update efficiency is improved.

Description

A method for automatic update of map cache service

technical field

The present invention relates to the technical field of map caching, in particular to a method for automatically updating map caching services.

Background technique

With the development of network technology, the application of geographic information system (WebGIS) in the network environment is becoming more and more extensive. For example, Google maps and MapBar maps in daily life have widely affected the lives of the public. Different from the traditional WebGIS method in the past, these modern maps no longer dynamically generate map pictures on the client side (that is, every time the client generates a new map request, the server needs to regenerate the map picture and send it to the client), but uses Map cache service mechanism. Since GoogleMap launched the Tile Map Image (tile map) method, this map cache service mechanism has become a key technology to improve the performance of the map application system. In map caching technology, network transportation cost and data inventory replacement cost have always been the main factors affecting system efficiency. The JPEG format is widely used in the map cache service mechanism due to its super compression capability and excellent image quality.

In the past, due to the slow update of data, the update of map cache data was also very slow, which resulted in manual implementation of map cache update. Today, with the rapid development of the economy and society, people's demand for fast-updating data is becoming more and more urgent, and this manual map cache update method has become a major bottleneck, and a breakthrough is urgently needed. For example: the cache update method of MapGIS can only realize the cache update of the global map but cannot define the scope of data update (using a 1:500 scale, the update of city-level data takes about one day); the cache update method of ArcGIS can be Realize local map cache update, but need to manually define the update range and level, which also puts forward higher requirements for the quality of operators.

According to the update method of the map cache service and the update implementation principle, from data update to service update, the implementation steps of manual operation are as follows:

Get the scope of data update;

Find the service to be updated corresponding to the updated data;

Manually select the service that needs to be updated, and set the update range and update level in the cache update plan;

Temporarily suspend the provision of external services.

For the above four steps, some manufacturers can already provide cache service updates in a local area, while others cannot; when setting the map range, setting the range manually is not as accurate as using a computer to automatically calculate the range; in the service association data Manual operations are also prone to errors.

Based on the above reasons, more and more domestic manufacturers are beginning to realize the importance of cache automatic update service, and some domestic manufacturers have begun to study the cache service automatic update function, but limited by the previous data update and data processing procedures, Its automatic cache update process also has some limitations. However, foreign manufacturers, especially some platform providers, still have their foothold abroad, and have not fully realized the strong actual demand of the Chinese market, and are still using manual methods to update map caches.

Contents of the invention

In order to solve the above problems, the object of the present invention is to provide an automatic caching map cache updating method.

The present invention provides a method for automatically updating a map cache service, which is characterized in that it comprises the following steps:

Step 1, setting the automatic update identification of the map service when the map service is published, managing the identification information of the automatic update identification, and recording the corresponding service information in the identification information;

Step 2, define the map update process, including three steps,

Step 201, define a checkout scheme: each checkout scheme is an update task, and layers to be checked out are defined in the checkout scheme;

Step 202, scheme checkout: set the scope of checkout, and check out the data within the scope of checkout to the temporary library, the data in the temporary library can be modified and updated by outside workers, and at the same time, the data in the scope of checkout Lock the data in it;

Step 203, plan check-in: select the check-out plan and the data to be checked in, compare the check-in data with the original data, and set the check-in data and the original data at the same time Mapping relationship, enter the checked-in data into the layer that needs to be checked-in;

Step 3, according to the topology inspection, judge the changes between the checked-in data and the original data, obtain the map update range and update data, and construct the update range and update level of this cache update in the map cache update task;

Step 4, according to whether the map service sets the automatic update identifier, the acquired update range, and the update level, it is judged whether the map starts automatic cache update, if so, proceeds to step 5, otherwise does not start cache automatic update;

Step 5, if the map cache service has been published or the default scheme template has been set, go to step 6, otherwise build a map cache update scheme template;

Step 6, build a map cache update tool;

Step 7, using the cache update tool to read the cache update plan template, and set the update range and the update level to form a new cache plan;

Step 8: After the update data is updated, the acquired update range and update level are added to the map cache update tool in the form of a cache task, triggering the execution of the map cache update.

As a further improvement of the present invention, the content of the cache task in step 8 is stored in a database.

As a further improvement of the present invention, the map cache update tool monitors the database.

The beneficial effects of the present invention are:

1. Templating of the cache update scheme: the cache update scheme is stored in the form of a template, which is convenient for the user to modify for the second time. If different services use the same update scheme, just use the stored template directly.

2. Automatic update trigger of map cache service: The way of map cache update is changed from manual trigger to automatic trigger, which makes map cache service update and data update synergistic without manual intervention. The acquisition of the data update range and the update of the specified level are automatically calculated by the program for each update range and update level, making the content of each update more accurate, thereby greatly reducing the cache update time and improving the cache update efficiency.

Description of drawings

FIG. 1 is a flowchart of a method for automatically updating a map cache service according to an embodiment of the present invention.

Detailed ways

The present invention will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

As shown in Figure 1, a method for automatically updating a map cache service according to an embodiment of the present invention, the method includes:

Step 1, setting the automatic update identification of the map service when the map service is published, managing the identification information of the automatic update identification, and recording the corresponding service information in the identification information;

Step 2, define the map update process, including three steps,

Step 201, define a checkout scheme: each checkout scheme is an update task, and layers to be checked out are defined in the checkout scheme;

Step 202, plan checkout: set the checkout range, and check out the data within the checkout range to a temporary library, the data in the temporary library can be modified and updated by outside workers, and at the same time, check out the data in the checkout range Lock the data in it;

Step 203, plan check-in: select the check-out plan and the data to be checked in, compare the check-in data with the original data, and set the check-in data and the original data at the same time Mapping relationship, enter the checked-in data into the layer that needs to be checked-in;

Step 3, according to the topology inspection, judge the changes between the checked-in data and the original data, obtain the map update range and update data, and construct the update range and update level of this cache update in the map cache update task;

Step 4, according to whether the map service sets the automatic update identifier, the acquired update range, and the update level, it is judged whether the map starts automatic cache update, if so, proceeds to step 5, otherwise does not start cache automatic update;

Step 5, if the map cache service has been published or the default scheme template has been set, go to step 6, otherwise build a map cache update scheme template;

Step 6, build a map cache update tool;

Step 7, using the cache update tool to read the cache update plan template, and set the update range and the update level to form a new cache plan;

Step 8: After the update data is updated, the acquired update range and update level are added to the map cache update tool in the form of a cache task, triggering the execution of the map cache update.

Further, the content of the cache task in step 8 is stored in a database.

Further, the map cache update tool monitors the database.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention. 5 -->

Claims (3)

1. a cache map service automatic update method, is characterized in that, comprise the following steps:

Step 1, arranges the automatic more new logo of Map Services when Map Services is issued, manage the identification information of described automatic more new logo, in described identification information, record corresponding information on services;

Step 2, the flow process of definition map rejuvenation, comprises three steps,

Step 201, definition checks out scheme: each scheme that checks out is exactly a more new task, in the described layer checking out definition in scheme and need to check out;

Step 202, scheme checks out: arrange and check out scope, and the described data checked out in scope are checked out temporary library, and the data of described temporary library supply operating personnel outside to modify and upgrade, and lock to the described data checked out in scope simultaneously;

Step 203, scheme logs on: check out scheme and the data needing to log on described in selection, the data logged on described in comparison and original data, arrange mapping relations to the described data that log on and described original data simultaneously, by the described data inputting logged on in the layer needing to log on;

Step 3, according to topology inspection, the situation of change of the data logged on described in judgement and described raw data, obtains map rejuvenation scope, more new data, builds the cache map more this time more new range of buffer update and Update Level in new task;

Step 4, serve according to the map whether arrange described automatically more new logo and the described more new range obtained, described Update Level judge whether map starts buffer memory and automatically upgrade, if then carry out step 5, otherwise do not start buffer memory and automatically upgrade;

Step 5, if issued cache map service or arranged default scheme template, carry out step 6, otherwise built cache map update scheme template;

Step 6, builds cache map more new tool;

Step 7, utilizes described buffer update instrument to read described buffer update plan template, and more new range and described Update Level described in arranging, form new buffering scheme;

Step 8, after described renewal Data Update completes, the described more new range obtained and described Update Level, add described cache map to more in new tool in the mode of buffer memory task, triggers the execution that described cache map upgrades.

2. a kind of cache map service automatic update method according to claim 1, it is characterized in that, the content database of the task of buffer memory described in step 8 stores.

3. a kind of cache map service automatic update method according to claim 2, it is characterized in that, described cache map more new tool is monitored described database.