I've tried to extract manning's n values for the cross-sections at my site of interest, however I was quite struggling with that. The RiverGis kept saying ProgrammingError('function st_line_interpolate_point(geometry, numeric) does not exist\nLINE 39: ST_Line_Interpolate_Point(inter_xs_dump.geom, 0.0000...\n ^\nHINT: No function matches the given name and argument types. You might need to add explicit type casts.\n')
Therefore I've tried the same process with BaldEagle sample data but the result is just the same! The same error occuts. I am getting helpless, does anybody faced the same problem? My input polygon layer has just the same features and structure as the one in sample data.
Thanks for any kind of help!