Content deleted Content added
|
|
|
<br>
=When should I not use a combination of SGS and Quadtree?=
Based on the benchmarking thusso far there seems to be little reason not to use SGS with Quadtree. The one exception is if the underlying resolution of the DEM is of similar (or coarser) resolution to the 2D cells, then there is little reason to use SGS as there is no detailed sub-cell terrain to sample. SGS was not made the default in the 2020-01 release because for some models, especially those with coarse cell sizes over highly variable terrain, you can see substantially different results due to SGS picking up a lot more detail of the terrain within a 2D cell. Using Quadtree with SGS, and by using coarser cells within your model than you would have using a HPC grid, you will achieve a much better resultresults and good results convergence (ascan discussedbe further above)achieved. It's highly likely that SGS will be made the default in a future release once there has been extensive industry benchmarking demonstrating using SGS to be consistently superior to not using (which is the case thus far)it.<br>
<br>
|