Author(s)

J. Zhang & Y. Parks

Abstract

Dynamic linking between GIS and surface water databases J. Zhang & Y. Parks Institute of Hydrology, Crowmarsh Gifford, Wallingford, &BB, Abstract Within the field of surface water hydrology the use of relational databases is being extended to include Graphical Information Systems (GIS). The method proposed in this paper involves using two separate databases to manage the GIS and the surface water database, and provides dynamic links between the two components. These components perform distinctive tasks - the GIS is responsible for manipulation of visual objects as part of the user interface; the surface water database performs data retrieval and processing in response to the requests from the GIS. Since links between the GIS and the surface water database are dynamic, the two separate components can be set-up independently providing flexibility. 1 Introduction A surface water hydrological database and analysis package (HYDATA) h

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