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A simple input file similar to the TUFLOW geometry control file is input into the utility. This is nominally given the extension .egc (Estry Geometry Control).<br>
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Two input GIS layers can be used, these are the branch lines (channels) and cut lines (cross sections). The branch line is split into the 1d_nwk layer, a new 1D channel is created for each section. The GIS attributes of these are defined in the sections below.
===Branch Lines===
The branch lines are split into channels using the cross-section cut lines detailed below. A number of options can be set for the branch lines. Attributes for the branch line are:
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