I have a point shapefile, want to create a bathymetric map for a natural lake. I have tried 3D analyst and spatial analyst tools. They both create the bathymetric contour and surface raster based on the coordinates of the points I provided, in spite of the lake boundary. How to include the lake boundary in to the interpolation process.
I also have seen people just clipped the raster file with the lake boundary, but I don't think it is correct.