How to correct a construction at the edge of the project area

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A Weir right at the edge of the project area.
The Weir removed, as it would have had no effect on the model.

When using the Water Overlay, Constructions may not function when their centerpoint or either of their endpoints are on cells where no calculation takes place. This may be due to the cell falling outside of the calculation area, or being too close to the edge of the project area.

Constructions at the edge of the model may either be important or unimportant for your calculations. For example, a Culvert connecting the waterway to one outside the project area is not important, as no water would be able to flow to there anyway. A Pump or Inlet would be important, as those would force water in that location to flow in or out.

  • If a Constructions isn't important, it can either be disregarded (its presence will not affect the calculation if it is deemed invalid), or removed from the model.
  • If a Construction is important, consider moving it so that it is entirely located within the area where calculations take place.
Editor → Current Situation (Ribbon tab) → Buildings (Ribbon bar) → The structure to move (Left panel)

How to move a Construction into the calculation area:

  1. Select the Construction in the Editor.
  2. At the bottom of the right panel, select "Draw area".
  3. Set the brush to "Remove" mode.
  4. Draw a selection overlapping with the Construction's current polygon
  5. Select "Apply selection" in the bottom panel. The polygon of the Construction is now removed.
  6. Select "Draw area" again.
  7. Set the brush to "Add" mode.
  8. Draw a polygon in the 3D world in the location where the Construction should be. Ensure the centre and/or endpoints of the polygon are well into the calculated area.
  9. Select "Apply selection". The Construction is now moved to a valid location.