Hello,
I am aware of the RASMapper rendering options and how they work, and I have seen the effects on depth and velocity maps. However, when I make an arrival time raster, regardless of the rendering option selected in the RASMapper options, it seems to use the horizontal surface option when exporting the arrival time raster based on terrain.
As described in the 2D manual, horizontal surface rendering results in spotty maps in areas that are steep, have large cells, or shallow depths. I have a model that hits all three of these points in some areas, so in these areas the arrival time map is spotty and confusing for non-modelers looking at these files.
If I do not have the option to adjust the model (e.g. use smaller cell sizes in steep areas), is there a way to make arrival time maps use interpolation for a “smoother” looking map? Or is it a technical limitation in how the program calculates arrival time?
It is tough to explain to non-modelers why this happens and why it does not invalidate the results, even though it looks funny and does not quite match the depth/velocity maps. When necessary, we have post-processed the arrival time raster in GIS to fill in “missing” areas using nearest-neighbor techniques, but I am wondering if there is a built-in way to force a map that appears more reasonable.
Thanks!