On-line linkage update service method of multi-scale geographic data

Abstract

The invention provides an on-line linkage update service method of multi-scale geographic data in an internet mode. A multi-scale geographic data linkage back-trace expansion updating mechanism is achieved, and geographic ontology is applied to establish a multi-scale geographic data presentation model and construct a multi-scale geographic special database. A characteristic variable quantity of different-phase multi-source data is discovered by applying change detection algorithm, an incremental change data package and ground state geographic data are subjected to element-level on-line update to form uptodate state geographic data, and the incremental change data package is expanded and updated to other-scale geographic data by multi-scale data integration and service composition of spatial information services. By the on-line linkage update service method of the multi-scale geographic data, integration and sharing of the multi-source heterogeneous multi-scale geographic database are guaranteed while on-line update, linkage update and dynamic update of service-oriented distributed geographic information processing are achieved.

Description

technical field [0001] The invention belongs to the technical field of network geographic information systems and services, and in particular relates to a new online linkage update service method supporting multi-scale geographic object databases. Background technique [0002] Online linkage update service is a key technology in the integration, sharing and update application of multi-scale geographic data. It conforms to the development trend of network GIS (Geographical Information System, geographic information system) and spatial information services. The integration framework and shared application mode of geographic data directly affect the operation and maintenance of multi-scale geographic data and its spatial information system. In the distributed network environment, combined with the open geographic information interoperability framework, the multi-scale geographic data linkage retrospective expansion update mechanism is realized, and the geographic ontology is us...

AI Technical Summary

Problems solved by technology

These existing methods mainly have problems such as inconsistency of geospatial database data status, isolated update of single fixed-scale data, difficulty in incremental dynamic update, and these data update methods will also cause data source and result data to not be shared and disseminated in time, affecting many Operation of Scale Geographic Data and Its Application System

The batch update method of geographic data version based on time series or ground state correction often causes problems such as repeated storage and data redundancy, and the data that has not changed is also wasteful to update according to the map frame

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