Research and Implementation of Geological Disaster Spatial Information Management Platform Framework Based on Geospatial Portal

摘要

The paper discusses the technical issues of developing the web-based distributed spatial information management framework for geological disaster control. The framework includes four main components: 1) The web-based geospatial portal, which provides users web-embedded GIS user interface with union portal passport and uniform identity authentication. Integrated with role-based and geospatial metadata-driven authorization model, geospatial portal provides users individual functions and geospatial data view. 2) Integrated geological disaster spatial information management platform, which integrates various geo-disaster property and spatial data. Using Web Services and Service Oriented Architecture (SOA), the integrated platform supports multi-source and multi-temporal data interoperability and provides integrated data service for users. 3) Geo-metadata management and service sub-system. Geo-metadata including geospatial and non-spatial metadata, model and method metadata, functional modular metadata have long played an important role in the management of geological disaster datasets, and are employed to organize, maintain and document the geographic resources. Metadata services provide metadata registration, location and retrieval service, and give the system developer original document assistant during the secondary development. With functional modular metadata, system carries out the role authorization driven by metadata. 4) The Web-embedded virtual globe-based 3D GIS engine, which provides 3D visualization and interactive user interface. Various geological disaster data and spatial information are integrated and the results can be visualized in virtual globes, which can help day-to-day users and high-level decision makers perform professional analysis, understand the complex analytical results by a well-designed 3D visualization and interactive user interface. Auxiliary spatial analysis tools such as 3D distance measurement, slope calculation, filling and cutting analysis, terrain section analysis are also integrated to help end users perform geological disaster early warning.