You Can

  • submit address
  • insert coords (lat,lon), even with name as: lat,lon (place title).
    (The title-trick works for address, too)
  • submit link from google map ("link" on top right of the map)
  • in edit mode: the zoom and map type is saved. Drag the pin to refine location.
 

Coordinates formats

  • latitude (-90..90), longitude (-180..180), altitude
    (altitude optional but only with decimal format - the next one)
  • 51.5103,-0.133982
  • +51° 30' 37.08", -0° 8' 2.34"
  • N 51° 30.618' W 0° 8.039'