I created a stream network from an existing DEM. My ultimate project goal is to be able to select a river from my stream network and use the 3D analyst to generate stream profile (Elevation by Distance).
The polylines I've created so far don't have M or Z values and I'm not sure how to add these. I have a DEM and I know I can add surface information which would add a z-max, z-min, and z-mean to the attribute table but that doesn't actually make it a polyline Z.
As of now to create a stream profile I only know how to use the 3D analyst by manually picking points/lines along the DEM. For my area this is very tedious and time consuming.