title: Reduce number of points in line
body: <p>I'm searching for algorithms to reduce the LOD of polylines, lines (looped or not) of nodes.
   In simple words, I want to take hi-resolution coastline data and be able to reduce its LOD hundred- or thousandfold to render it in small-scale.</p>
  
  <p>I found polygon reduction algorithms (but they require triangles) and Laplacian smoothing, but that doesn't seem exactly what I need.</p>