Abstract
A prototype online Spatial Information System for Geologic Modeling (SISGeM) has been developed. SISGeM has been successfully implemented by integrating the GIS and relational database management system (RDBMS) with the Internet. The spatial data management is carried out using Geographic Resource Analysis Support System (GRASS) GIS. Online access to GRASS functions has been enabled using the basic framework of GRASSLinks interface. Several additional modules were incorporated into web interface to tailor the system for its present needs. PostgreSQL RDBMS manage data that is recorded in a field outcrop or derived by digitizing hardcopy geologic maps. The system is capable of managing geologic data, generating 3-D geologic models and visualizing horizontal sections at user-defined depths.
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