TOWARDS VIRTUAL WATERSHEDS: INTEGRATED DATA MINING,MANAGEMENT, MAPPING AND MODELING

摘要

As the amount of satellite telemetry, remote sensing and other automated data collection systems increases, a great quantity of geospatial data is being accumulated in online spatial databases and spatial information repositories. This data is accessed using standards-based web services such as those defined by the Open Geospatial Consortium (OGC). Additionally, a growing quantity of climate and hydrologic point observation data is being stored and distributed in standards-based web systems and services such as defined by the Consortium of Universities for the Advancement of Hydrologic Sciences (CUAHSI). These developments, together with the rapidly increasing availability of open source GIS and modeling software tools, represent the beginning of a truly open and accessible standards-based virtual watershed system which could be used for education, research, and management purposes. This paper explores the fundamental requirements of such a system including data mining through on-line analytical processing (OLAP), data management using well defined server side and client side data management tools and standards for both spatial and temporal data, visualization through both web-based and client side open source mapping systems, and modeling using OpenMI as a model interoperability standard.