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Fiddling with a drainage surface

Question asked by huffmanp on Dec 15, 2014
Latest reply on Dec 28, 2017 by drewskey

What's the most efficient workflow for fixing small areas in a filled LIdar surface when you find leaks that are sending the stream flows the wrong way? Like a road bed that is blocking flow but I know there is a culvert.  In this case, it's the opposite: I want to build a dike to keep flow accumulation or a cost distance line from jumping out of a ditch.

 

Before, did I do something like create a little polygon the shape of my dike, then set the value to the desired top elevation, then use Polygon to Raster to make a dike raster with cell size the same as my fill surface, then run a con something like FixedRas = Con(DikeRas,DikeRas,FillRas)  ?

 

Or does it work better to use the dike polygon as a mask and process the fill raster somehow.  Or does it work better to run the dike polygon through Polygon to Points, then set the value in the points, then go back to raster< and run the Con?

 

Or is there a better way that I'm not seeing?

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