Method for synchronously updating data based on grid GIS (Geographic Information System)

Abstract

The invention relates to the field of grid GIS (Geographic Information System), in particular to a method for synchronously updating data based on grid GIS. The method comprises the following steps of: (1) updating the spatial data of a node, and writing into an update data table in a node database; (2) regularly accessing the update data table in a node database by a local daemon process, and reading and sending the update data to a message server in the existence of update content; (3) receiving the update data by the message server, reorganizing the sent update data table, writing into a data table of the message server, releasing an update message, and sending the message to nodes subscribing relative subjects; and (4) regularly accessing the message server to receive the message by are ceiving end, and updating the local data table according to the acquired data table of the message server. The method for synchronously updating data based on grid GIS provides a method for universally, rapidly and synchronously updating the node data in a distributed heterogeneous system.

Description

technical field [0001] The invention relates to the grid GIS (Geographic Information System) field, in particular to a grid GIS-based data synchronous update implementation method. Background technique [0002] The database in grid GIS stores massive spatial data. These heterogeneous spatial data focus on different needs, provide different spatial operation services, and are distributed on servers in different geographical locations. Data required for spatial operations such as display, buffer, and overlay analysis usually requires gigabytes of data transfer. Therefore, the performance of data transmission has become an important indicator of system performance, which directly affects the operating efficiency and performance of the system. At the same time, changes in the status of spatial data of nodes in the distributed system need to be updated to the system manager in time, which also directly affects the stability and effectiveness of the system. [0003] At present,...

AI Technical Summary

Problems solved by technology

[0004] 1. The heterogeneous operating system and data in the distributed environment greatly increase the complexity of the distributed system

It becomes very difficult to update data between nodes

[0005] 2. According to the characteristics of large number of spatial data transmission and high transmission speed requirements, there is still a lack of general and consistent effective methods and application solutions

[0006] 3. The existing relational database system does not support heterogeneous data update enough

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