class MapViewController
{

  def index = {

    def rasterEntryIds = params.filenames?.split(',')
    def left = null
    def right = null
    def top = null
    def bottom = null

    rasterEntryIds.each {
      def rasterEntry = RasterEntry.get(it)

      if ( left == null || rasterEntry.groundGeom?.bounds?.minLon < left )
        left = rasterEntry.groundGeom?.bounds?.minLon

      if ( bottom == null || rasterEntry.groundGeom?.bounds?.minLat < bottom)
        bottom = rasterEntry.groundGeom?.bounds?.minLat

      if ( right == null || rasterEntry.groundGeom?.bounds?.maxLon > right)
        right = rasterEntry.groundGeom?.bounds?.maxLon

      if ( top == null || rasterEntry.groundGeom?.bounds?.maxLat > top )
        top = rasterEntry.groundGeom?.bounds?.maxLat
    }

    [filenames: params.filenames, left: left, top: top, right: right, bottom: bottom]
  }
}