     console.log 'allChannelsReceived'
     @dfs = undefined
     
-    @computeNormalizedScales()
     scales = @collection.getColorScales()
     
     @wfits.setCalibrations(1, 1, 1)

      unless @collection.hasExtent
        mins = @collection.map( (l) -> return l.get('minimum'))
        maxs = @collection.map( (l) -> return l.get('maximum'))
        globalMin = Math.min.apply(Math, mins)
        globalMax = Math.max.apply(Math, maxs)
        @wfits.setExtent(globalMin, globalMax)
        @collection.hasExtent = true
      
      @wfits.setImage(band)

  start: =>
    console.log 'start'

  setBand: (band) =>
    if band is 'gri'
      @wfits.drawColor('i', 'r', 'g')
    else
