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WinCan VX works on the Upstream-Downstream concept at all times.
What this means is that in our data we always specify the manholes at the ends of a pipe as the upstream end and the downstream end, and we therefore assume that the flow direction is always from the upstream end to the downstream end.
The inspection direction is relative to the flow direction, so a downstream inspection is ‘with the flow’ and and upstream inspection is ‘against the flow’.
From this, it is clear that the inspection direction cannot be defined if the flow direction is unknown, except in the case where we define the inspection direction as going ‘from manhole A to manhole B’ - this method of description is independent of the flow direction.
In most standard, bot the flow direction and the inspection direction can have 1 of 4 values in the data:
Downstream
Upstream
Unknown
Not Defined
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