   
   # Call when all FITS received and WebFITS library is received
   allChannelsReceived: (e) =>
+    @dfs = undefined
     @ready = true
     
     # Get extent for each layer and add to settings

  dimension: 440
  bands:  ['u', 'g', 'r', 'i', 'z']
  source: 'http://spacewarps.org.s3.amazonaws.com/subjects/raw/'
  
  # Default parameters
  defaultAlpha: 0.09
  defaultQ: 1.0
  defaultScales: [0.4, 0.6, 1.7]
  
  
  events:

    @wfits = new astro.WebFITS(@el, @dimension)
    unless @wfits.ctx?
      alert 'Something went wrong initializing the context'
      return
    
    # Load offsets if they exists
    @wfits.xOffset = @opts.xOffset or @wfits.xOffset
