anchor.diff:      network_in.<%= tc[:name].tr("-", "_") %>.label <%= tc[:name] %>
       network_in.<%= tc[:name].tr("-", "_") %>.cdef <%= tc[:name].tr("-", "_") %>,8,*
       network_in.<%= tc[:name].tr("-", "_") %>.draw AREASTACK
  +    network_in.<%= tc[:name].tr("-", "_") %>.min 0
   <% end -%>
       network_out.graph_title Outbound network traffic
       network_out.graph_vlabel bits out per ${graph_period}
  
positive.code:     network_out.<%= rs[:name].tr("-", "_") %>.label <%= rs[:name] %>
      network_out.<%= rs[:name].tr("-", "_") %>.cdef <%= rs[:name].tr("-", "_") %>,8,*
      network_out.<%= rs[:name].tr("-", "_") %>.draw AREASTACK
  <% end -%>
      mod_tile_fresh.graph_title freshness of served tiles
      mod_tile_fresh.graph_args --base 1000 -l 0
  
negative.code:     network_in.<%= rs[:name].tr("-", "_") %>.label <%= rs[:name] %>
      network_in.<%= rs[:name].tr("-", "_") %>.cdef <%= rs[:name].tr("-", "_") %>,8,*
      network_in.<%= rs[:name].tr("-", "_") %>.draw AREASTACK
      network_in.<%= rs[:name].tr("-", "_") %>.min 0
  <% end -%>
      network_out.graph_title Outbound network traffic
      network_out.graph_vlabel bits out per ${graph_period}
  