释义 |
nadir point
nadir point
nadir point[′nā·dər ‚pȯint] (optics) photograph nadir nadir point i. The same as nadir ii. As it relates to aerial photogrammetry, it is the point where a plumb line dropped from the front nodal point pierces the photograph. This point is vertically beneath the exposure station. In the illustration, it is point N. Also called a photo nadir and a photo plumb point.MedicalSeenadir |