EVS conducts most of its geologic modeling and analysis using input data contained in one (or more) of three different ASCII files. The content and format of these files has been designed to facilitate export of the data from GIS systems, boring log programs, common database and spreadsheet data storage formats.
The simplest format used to represent geologic information is the Pre-Geology Format (PGF). This format represents raw 3D boring logs where materials have been assigned sequential integer values. This workbook covers the process of taking the Pre-Geology file information and converting it to a Hierarchical geologic file (.geo). More advanced use of the PGF file format for Geologic Indicator Kriging is covered in the Advanced Geologic Modeling Concepts workbook.
Probably the most commonly used geology file format throughout the workbooks is the Borehole (.geo) Geology Format. This file represents interpreted hierarchical geologic layer data collected from vertical borings. More complex examples of .geo files are given in Geology File for Layers and Lenses and Geology File for Dipping Strata
When geologic data (again representing hierarchical geologic layers) is collected from multiple sources such as ground surveys, limited borings, and seismic data, the Geology Multi-File (.gmf) Format is generally used. All modules which use .GEO files can use .gmf files instead.
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