for c in ( AvgLandTemp ) return encode(switch
 case c[ansi("2015-06"), Lat(35:75), Long(-20:40)] = 99999
 return {red: 255; green: 255; blue: 255}
 case 18 > c[ansi("2015-06"), Lat(35:75), Long(-20:40)]
  return {red: 0; green: 0; blue: 255}
 case 23 > c[ansi("2015-06"), Lat(35:75), Long(-20:40)]
 return {red: 255; green: 255; blue: 0}
 case 30 > c[ansi("2015-06"), Lat(35:75), Long(-20:40)]
 return {red: 255; green: 140; blue: 0}
 default return {red: 255; green: 0; blue: 0}  , "png")