active scalar data set
active vector data set
active ccf data set
A data set is a set of values associated with each node, cell, vertex, or scatter point in an object. A data set can be steady state (one value per item) or transient (one value per item per time step). The values in the data set can be scalar values or vector values. Certain types of objects in GMS have an associated list of scalar data sets and a list of vector data sets. Each of the following objects in GMS can have both scalar a vector data sets:
The following objects can only have scalar data sets:
Borehole Sample Data
The commands for manipulating data sets are located in the Data menu.
Data sets are used for both pre- and post-processing of models. For example, a scalar data set associated with a 3D grid can represent starting values of head or values of hydraulic conductivity for a groundwater modeling problem. Another data set associated with the same grid may represent computed head values. Data sets can be used to generate contours, iso-surfaces, vector plots, and animation sequences.
Data sets can be generated in a variety of ways. They can represent output from a groundwater model (head, drawdown, etc.). They can represent tabular values in a text file entered by the user or exported from another application such as a GIS. They can be created by interpolating from a scatter point set to a TIN, grid, or mesh. Data sets can also be generated by performing mathematical operations on other data sets with the Data Calculator.
One advantage of the data set list approach for managing information is that it facilitates transfer of information between different types of models or models with differing resolution. This is accomplished through scatter point sets and interpolation. TINs, borehole contacts, borehole sample data, grids, and meshes can all be converted to a 2D or 3D scatter point set. When an object is converted to a scatter point set, all scalar data sets associated with the object are copied to the new scatter point set. The data sets can then be transferred from the scatter point set group to other objects of any type using one of the supported interpolation schemes.
A data set can be exported by right-clicking on the data set in the Project Explorer and select the Export command. The Save As dialog has three filter types that can be exported:
Binary Data Set Files (*.dat)
ASCII Data Set Files (*.dat)
HDF5 data Set Files (*.h5)
A data set can be imported by right-clicking on any of the objects explained above in the Project Explorer and select the Import Data Set command. This command brings up the File Open dialog.
Data sets are displayed and managed in the Project Explorer. Click here to learn about data sets in the Project Explorer.
Each object (TIN, Grid, Mesh, or Scatter Point Set) in GMS has a set of values which is designated as the "active data set." The active data set is an important part of model visualization in GMS. Each time the display is refreshed, the contours and other display features are generated using the active data set.
The active data set and time step are displayed in the Project Explorer. Left-clicking on a solution or data set in the Project Explorer makes that item "active" and the display is automatically updated in the GMS window. The table below shows the icons displayed next to the active data sets.
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active scalar data set |
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active vector data set |
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active ccf data set |