text: https://wiki.openstreetmap.org/wiki/Beginners_Guide_1.1
  
  "As a rule of thumb, use no external resources except those available in the editors. If you think you found a non-copyrighted resource that isn't available in the editors, please discuss it first with local mappers using contact channels."
  
  Government produced data is not necessarily "open" or "free" data. Before assuming that a source of data is licenses in a way that is compatible with ODbL it's important to verify it is compatible. Governments in the past have been resistant or out-right refused to allow their data to be used by OSM and sometimes actually have quite restrictive licenses.