Floating Point Errors

[jit-zs]

MarchingSquaresAlgoTest.mp4

How do i fix these floating point errors in my script, is it possible that its the algorithm its self
double val = noise.noise2D_01(((i * MS_SPACING) * zoom) + (loaded_chunks[x].pos.x * zoom), ((j * MS_SPACING) * zoom) + (loaded_chunks[x].pos.y * zoom));
long ival = lround(val * 10); // Attempted mitigation using rounding
loaded_chunks[x].marching_squares[i][j].on = ival < 5; // The line causing the artifacting from fp errors