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Feature (vector-based) data is used to represent things such as streams, watershed boundaries and material (soil, land use, permeability, or another type) zones. Various GIS data sources are of great importance to water resources modeling. Integration of ArcObjects with Water Resources Modeling GIS Data This allows the developer to combine the strengths of GIS and the strengths of specialized programs in a single package. With this new technology, it is possible to use GIS' data management capabilities in other specialized programs. DLL's allow access to core GIS capabilities. This technology allows developers to expand ArcGIS platforms and develop customized applications. ArcObjects TechnologyĪrcObjects is based upon Microsoft's Component Object Module (COM) technology. However, some GIS spatial or tabular data can be lost or ignored when exporting it from the GIS and reading it in to another program. These programs can have good interfaces to input parameters for specific water resources computer models. Specialized programs separate from a GIS can have better tools specifically designed for editing data, but these specialized programs lose the strengths of managing data in a GIS. In addition, it is difficult to develop topologically correct water resource models and edit both the spatial and tabular data in a GIS.
However, in order to create a water resource model, this data has to be processed through scripts and macros, which may or may not be readily available. The fact that the data is stored in a database makes it easy to manage and access. In using a GIS to develop water resources models, a user can take advantage of the built in GIS functions for maintaining and processing data. The first is to use scripts and macros within the GIS, while the second is to export GIS data to another program. Both have their own strengths and weaknesses. Linking GIS and Water ResourcesĪt the present, there are two methods currently used in the field of water resources to link GIS data with various models. WMS can use GIS data layers for computing hydrologic model parameters. GMS can use GIS data sources such as soil permeability layers for setting up groundwater models, while SMS can use streambed roughness layers for setting up two-dimensional surface water models.
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Each of these programs can take advantage of the various GIS data sources for creating or characterizing models. Three programs are being developed the Groundwater Modeling System (GMS), Surface Water Modeling System (SMS), and Watershed Modeling System (WMS).
#Surface water modeling system software#
The Environmental Modeling Research Laboratory, at Brigham Young University, Provo, Utah, is involved in creating software in the field of water resources. In the field of water resources, the use of digital terrain data has become even more important for creating computer models. As data becomes available electronically, more and more computer modeling is being done in place of traditional paper based approaches. The importance of using GIS data in today's water resources modeling is great. Using ArcObjects with this software, engineers will be able to exchange GIS maps and their associated databases in any format supported by ArcView 8.x in the analysis of watersheds and surface water and groundwater models. Through the use of Esri's ArcObjects technology, GIS tools and data sets are being integrated into the Watershed Modeling System (WMS) developed by the Environmental Modeling Research Laboratory at BYU. The increasing importance of GIS data in water resources engineering requires today's engineers to have access to and be able to process this data in analysis and computer modeling. Embedding GIS Technology in a Watershed Modeling Application with ArcObjects Embedding GIS Technology in a Watershed Modeling Application with ArcObjects