Point Map Range Tables Point Map Range TablesAll of the point-mapping tools in the RockWorks Utilities (Map | EZ Map, etc.) offer variable scaling of symbols. This means that the size of the symbols can vary across the map or diagram, based on the quantitative value measured at each sample site. With this scheme, you can declare actual symbol sizes for as many z-value ranges as you wish, using a "Symbol Range Table."
! You can store multiple Point Map Range tables in your project database. If you assign detailed names they'll be easy to distinguish when you're selecting which to use. Point Map Range tables can be accessed in the Project Manger, under the Project Tables | Map/Model Tables grouping.
Table Format
These tables have a very simple format, containing 4 columns of information.
- Minimum and Maximum: These represent any real number values, and establish a measured value range. Any sample points containing z-values (in a column specified by the user), that fall within this declared range will be plotted on the map or diagram with the symbol, color, and size declared to the right.
- Symbol: Choose a symbol and its color for the declared z-value range by double-clicking in the Symbol column, selecting from one of the displayed symbols, selecting a color for the symbol, and choosing OK.
- The symbols that are available are taken directly from the current Symbol Table. See Symbol Tables for more information about selecting symbols and accessing the symbol editor.
- Size: In this column, for each z-value range, enter the size at which the shown symbol will be plotted in the control point map. The size is declared in percent of map or diagram width.
- In the above example, any samples in the data sheet with Z-values (in this case, gold assay) ranging from 0 to 0.082 would be represented in the point map or other diagram with the open-circle symbol at 0.5 percent of the diagram width. Samples in the data sheet with Z-values ranging from 0.083 to 0.091 would be plotted with the open-square symbol at 1 percent of the diagram width, and so on.
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