Method for providing geographic information tile service and device for realizing the method

Abstract

The present invention provides a method for providing geographic information tile services, comprising the steps of: receiving a geographic information tile service request from a client, and parsing relevant information of geographic information tiles within the requested range; retrieving tiles according to parameters and related information Metadata base, if the tile metadata corresponding to the relevant information is retrieved, it is judged whether the tile is updated recently: if so, the tile is packaged and returned to the client; otherwise, the process is the same as if the tile metadata was not retrieved The data processing steps are as follows: retrieve the geographic information data corresponding to the tile according to the relevant information, rasterize and cut the geographic information data, thereby cutting out a new tile, and update the tile according to the new tile. Fragment database and ontology database, and return the new tiles to the client after packaging, so as to realize dynamic update and real-time cropping of geographic information tiles under the premise of improving service response speed. The present invention also provides a device for realizing the above method.

Description

technical field [0001] The invention relates to the field of geographic information systems, in particular to a method for providing geographic information tile services and a device for realizing the method. Background technique [0002] After years of development, geographic information applications have moved from data provision to online services, and have gradually become a dominant application method. Generally speaking, geographic information online services involve three aspects: server-side, client-side and network. Among them, the server is the service provider; the client is the service applicant; the network is the transmission channel. In order to improve the service response speed, usually, the geographic information is pre-rasterized on the server side and cropped into multi-level images of uniform specifications, that is, "tiles". When the server receives the user's geographic information service application, it searches the existing tiles and gives timely ...

AI Technical Summary

Problems solved by technology

However, if all the tiles included in the range of geographic information are to be cut in real time, the efficiency will inevitably be reduced, and the service response speed will not meet the user's requirements.

Moreover, if the real-time cropped tiles are stored for direct use in subsequent requests, the problem of inconsistency with the potentiality of the geographic information ontology is still not solved

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