View source for QGIS SWMM BC Create Channel Endpoint 1D/2D Connections

== Introduction ==
This tool creates 1D/2D connections at the endpoints of SWMM channels. HX connections are created on the upstream end, and SX connections are created on the downstream end. <br>

'''Note:''' The positions of the HX and SX connections may not be completely accurate, so it is recommended for the user to check the output. 
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== Usage ==
This tool, '''BC - Create channel endpoint 1D/2D connections''', can be found in the QGIS processing toolbox panel under TUFLOW >> SWMM. To open the Processing Toolbox panel, navigate to 'Processing' in the menubar and select 'Toolbox'.<br>
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[[File:open_processing_toolbox.png]]<br>
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=== Parameters ===
<ol>
<li>'''Input Conduits Layer:''' The conduits layer to which the 1D/2D connections will be made. 
<li>'''Selected features only:''' If channel(s) in the conduits layer have been selected using the 'Select Features' tool, this option will become available. If checked on, the tool will only create 1D/2D connections for the selected channel(s).
<li>'''Create connections at:''' Specifies whether the 1D/2D connections are made at the 'Upstream end', 'Downstream end', or 'Both ends' of the channel(s) in the conduits layer.
<li>'''Offset distance:''' Distance from the channel endpoint to the midpoint of the BC line.
<li>'''Length of BC lines:''' Length of BC lines.
<li>'''Set 2D cell elevation to 1D culvert invert at 1D/2D connection cells if needed:''' If checked on, SX and HX boundaries will have the 'Flags' attribute set to 'Z'. This ensures that valid elevations occur at the 1D/2D interface. HX boundaries require 2D cell elevations at or above the 1D elevation, while SX boundaries require 2D cell elevations at or below the 1D elevation.
<li>'''Output Layer:''' Determines the location and filename of the output file. It is recommended to name the output layer with the prefix '''2d_bc''' so TUFLOW styles can be automatically applied.
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[[File:BC_Create_Channel_Endpoint_1D2D_Connections_Dialog_a.png]]
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== Example ==
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{{Video|name=Animation_BC_Create_Channel_Endpoint_1D2D_Connections_01d.mp4|width=1236}}
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Using the 'Selected Features Only' option:
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{{Video|name=Animation_BC_Create_Channel_Endpoint_1D2D_Connections_02c.mp4|width=1236}}



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