TUFLOW Output Discussion: Difference between revisions
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The differences can also be amplified when the rotation of the model is a non-zero value.
The extent of the grids is also different. When TUFLOW starts, it removes any redundant areas (if any) outside of 2d_code layer to reduce the calculation time:
* The extent of grids written directly from TUFLOW works with the unreduced area, encapsulating the entire rotated model domain in a north-south orientated rectangle.
* The extent of XMDF (or DAT) results is based on the reduced area. When the TUFLOW_to_GIS utility is used, the post-processed north-south aligned grids encapsulate the reduced model extent. The origin coordinates of such grids doesn't match the origin of the model (model domain), neither the grids written out from TUFLOW directly.
In general, a better interpolation of results is achieved when the grids are written directly from TUFLOW than when post-processed with TUFLOW_to_GIS utility. Importantly, when comparing results the recommendation is to be consistent and to use the same method for the duration of a project to ensure there are no differences as a consequence of the post-processing method.<br>
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