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A marked point recording where the ground was drilled.
Also known as: Drillhole symbol, Boring location marking
A borehole symbol marks where the ground has been drilled, with a reference number keyed to a log giving what was found at each depth. The symbol is a pointer to a record rather than information in itself, which is why the number matters more than the mark.
Marks the position of a borehole on a geological or engineering map, with a reference keyed to its log.
Contexts: Technical drawing, Maps
Is a pointer to a separate record rather than data in itself, since what was found is in the log and not in the symbol.
Contexts: Technical drawing, Maps
A small circle with a cross or a dot at its centre, carrying a short reference beside it.