principal point


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principal point

The foot of the perpendicular to the photo plane through the perspective center. Generally determined by intersection of the lines joining opposite collimating or fiducial marks.
References in classic literature ?
The princess for her part, going round the question in the manner peculiar to women, maintained that Kitty was too young, that Levin had done nothing to prove that he had serious intentions, that Kitty felt no great attraction to him, and other side issues; but she did not state the principal point, which was that she looked for a better match for her daughter, and that Levin was not to her liking, and she did not understand him.
Many are the examples of the great odds, between number and courage; so that a man may truly make a judgment, that the principal point of greatness in any state, is to have a race of military men.
It is undeniable that but for the desire to be where Dorothea was, and perhaps the want of knowing what else to do, Will would not at this time have been meditating on the needs of the English people or criticising English statesmanship: he would probably have been rambling in Italy sketching plans for several dramas, trying prose and finding it too jejune, trying verse and finding it too artificial, beginning to copy "bits" from old pictures, leaving off because they were "no good," and observing that, after all, self-culture was the principal point; while in politics he would have been sympathizing warmly with liberty and progress in general.
The principal point is, that he is sure not to divulge the secret, for the very good reason that he does not know it himself."
This fact was doubly apparent, by the rapid manner in which the battle in the forest rolled upward toward the village, and by an instant falling off in the number of their assailants, who rushed to assist in maintaining the front, and, as it now proved to be, the principal point of defense.
These dates were inscribed in an itinerary divided into columns, indicating the month, the day of the month, and the day for the stipulated and actual arrivals at each principal point Paris, Brindisi, Suez, Bombay, Calcutta, Singapore, Hong Kong, Yokohama, San Francisco, New York, and London--from the 2nd of October to the 21st of December; and giving a space for setting down the gain made or the loss suffered on arrival at each locality.
Those are the principal points about which I wished to be absolutely clear.
Pambrune informed Captain Bonneville that he had been at some pains to introduce the Christian religion, in the Roman Catholic form, among them, where it had evidently taken root; but had become altered and modified, to suit their peculiar habits of thought, and motives of action; retaining, however, the principal points of faith, and its entire precepts of morality.
Pour montrer davantage l'ampleur du trafic, les experts notent que l'Espagne [beaucoup moins que]reste le principal point d'entree en Europe pour la resine de cannabis en provenance du Maroc et demeure aussi une passerelle vers les marches d'Europe occidentale et centrale[beaucoup plus grand que], en dissimulant les quantites de haschich dans des camions transportes sur les ferries en direction de l'Espagne.
For businesses looking to invest in Tyne and Wear it is the principal point of contact, offering advice on all subjects relating to potential investment from sourcing sites to the provision of premises and advice on matters such as financial assistance, labour and training.
Benacre Properties, Gooch Estate and Principal Point Developments have joined forces to create the Southside Quarter.
Cette nouvelle etape des tractations a pu etre franchie grace a un compromis provisoire, a defaut d'une solution, sur l'epineuse question de la frontiere irlandaise, devenue ces dernieres semaines le principal point d'achoppement des tractations.

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