work plane การใช้

• The Vitagraph Film Company had him shoot the first aerial footage of New York City where he flew under the Brooklyn Bridge and Williamsburg Bridge in his Mayea Boat & Aeroplane Works plane.
• Daylight factor is  the ratio of the illuminance at a point on a plane, generally the horizontal work plane, produced by the luminous flux received directly or indirectly at that point from a sky whose luminance distribution is known, to the illuminance on a horizontal plane produced by an unobstructed hemisphere of this same sky ."