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Real-time dynamic update method for tiled map service cache suitable for online editing by users

A dynamic update and editing technology, applied in the field of spatial data map service publishing, can solve the problems of occupying server software and hardware resources, time-consuming, and few cache updates, and achieve the effect of improving efficiency, simple implementation method, and ensuring accuracy.

Active Publication Date: 2016-06-08
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the static cache regeneration methods used take a long time and occupy a lot of server hardware and software resources. There are not many related studies on cache update for frequent editing of map data.

Method used

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  • Real-time dynamic update method for tiled map service cache suitable for online editing by users
  • Real-time dynamic update method for tiled map service cache suitable for online editing by users
  • Real-time dynamic update method for tiled map service cache suitable for online editing by users

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Experimental program
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Embodiment

[0057] The first step is to pre-generate the hierarchical and block cache of map data. The cache space range is set as a rectangular block: the coordinates of the upper left corner are (435792.333, 3564678.561), the coordinates of the upper right corner are (636577.876, 3564678.561), the lower left The coordinates of the corner point are (435792.333, 3107522.773) and the coordinates of the lower right corner are (636577.876, 3107522.773). The default map service cache zoom level is 16, the block size is 256×256, and the cache image format is JPG.

[0058] The second step is to capture the user's editing operation and obtain the spatial range information of the outer rectangle of the editing block, and set the minimum value of the horizontal axis to BBoxMinX and the maximum value to BBoxMaxX; the minimum value of the vertical axis to BBoxMinY and the maximum value to BBoxMaxY. Assume that the user performs the operation of deleting polygonal area features, and the deletion oper...

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Abstract

The invention discloses a map service static caching local dynamic update method applicable to on-line edit. The map service static caching local dynamic update method applicable to on-line edit comprises the steps that (1) the organization mode of map service static caching files is defined, and a server caching with a layered and segmented map service is generated; (2) monitoring on on-line edit events of map elements is carried out, user edit block information and map service information of the user edit block information are captured in real time, and an edit and update request is sent to a map service static caching server; (3) the map service static caching server receives the edit and update request to carry out a local caching replacement operation; (4) a client browser learns about a replacement accomplishment message of the map service static caching server, and carries out a caching refresh operation. The map service static caching local dynamic update method applicable to on-line edit maintains synchronism and consistency reflected by map data after edit and web publishing, automatic interactive computer processing is carried out on the premise that a map data edit operation is not influenced, working efficiency is improved, and the map service static caching local dynamic update method applicable to on-line edit is quite wide in application prospect of the field of space information map service publishing, and can meet the actual service requirements for frequent edit of space data.

Description

technical field [0001] The invention relates to the technical field of spatial data map service publishing. In particular, it relates to a method for dynamically updating a part of a static cache of a map service, which is suitable for online editing. Background technique [0002] With the development of informatization and the intelligentization of data collection methods, spatial data expands rapidly, and the amount of data increases rapidly. Due to the need of data sharing, etc., the demand for online release of spatial data is increasingly urgent. However, the frequent interaction between the client and the server caused by the user's web browsing of spatial data causes problems such as excessive network load and slow user response. [0003] The network map service cache can partially or completely reduce the interaction between the client and the server, and enhance the user experience. The static cache can especially set the user's behavior in advance by prefetching,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/30G06F12/12G06F12/0893
Inventor 杜震洪刘仁义张丰钱宸曹敏杰
Owner ZHEJIANG UNIV
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