I will then create a regional surface that corresponds to the stream-bed elevations. I've thought of converting the flow-lines into a series of points, sampling the terrain at these points and then using one of the geostatistical tools to create a "smoothed" surface from these points. Anyone have thoughts on how to best accomplish this this?
Do you just need point elevations along a stream bed? What are you end goals with this? To push online?
I might have done something like this.
What are you looking for in a smoothed surface?
Do you have any screen shots?
I have had some success in predicting flood risk by building a "residual
surface" from detailed LIDAR data. I construct a smoothed surface across
the watershed (often a 7th to 10th order polynomial surface) and then
subtract the original detailed terrain surface, leaving the residual. This
surface provides a great visual representation of drainage systems across
a broad area. Rather than using a sampling from the entire terrain data
set, I'd like to try using just the axis of the drainage systems. My
hypothesis is that it may be even a better predictor. I've have been
working in ArcMap and ArcGIS Pro.