Used in GIS 2d_bc layers to connect 2D HX and 2D SX boundaries to 1D nodes. A line or polyline is digitised that snaps the 2D HX or SX object to the 1D node. The 1D node would be in a 1d_nwk layer. If the 2D HX or 2D SX snaps to the 1D node, no connection object is required. Alternatively a CN point object could be used.
As of Build 2003-06-AA, an ERROR occurs if a CN object is not snapped to a 2D HX or 2D SX object, or is redundant (ie. not needed). For backward compatibility, use Unused HX and SX Connections (.tcf file) or Unused HX and SX Connections (.tbc file) to change the ERROR to a WARNING. Note that for connections to 2D SX objects only one (1) CN object is required. Whereas 2D HX objects must have a minimum of two (2) connections – one at each end.
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