Première page
Page précédente
Page suivante
Dernière page
Réduire l’image
100%
Agrandir l’image
Revenir à la taille normale de l’image
Adapte la taille de l’image à la fenêtre
Rotation antihoraire 90°
Rotation antihoraire 90°
Imprimer la page
- TABLE DES MATIÈRES
- RECHERCHE DANS LE DOCUMENT
- TEXTE OCÉRISÉ
- Première image
- PAGE DE TITRE
- CONTENTS (p.621)
- CHAPTER I - FUNDAMENTAL PRINCIPLES OF ICONOMETRY (p.630)
- I. Orienting the picture traces on the working sheet (p.631)
- II. Arithmetical determination of the principal and horizon lines (p.633)
- III. Graphic method for dertermining the positions of the principal and horizon lines on the perspective (p.635)
- IV. The five-point problem (by Prof. F. Steiner). Locating the position of the camera station by means of the perspective when five triangulation points are pictured on one photograph (p.636)
- 1. Determination of the principal point and of the distance line (p.637)
- 2. Simplified construction for locating the camera station by means of the five-point problem (p.637)
- 3. Application of the five-point problem for the special case when the five points are ranged into a triangle (p.638)
- 4. To find the elevation of a camera station that had been located by means of the five-point problem (p.638)
- V. The three-point problem (p.639)
- VI. Orientation of the picture traces, based upon instrumental measurements made in the field (p.641)
- VII. Relations between two perspectives of the same object viewed from different stations ; Prof. G. Hauck's method (p.641)
- VIII. To plat a figure, situated in a horizontal plane, on the ground plan by means of its perspective (p.645)
- IX. To draw a plane figure on the ground plan by means of the "method of squares" if its perspective and the elements of the vertical picture plane are given (p.649)
- X. The use of the "vanishing scale" (p.651)
- CHAPTER II - PHOTOGRAPHS ON INCLINED PLANES (p.653)
- CHAPTER III - PHOTOTOPOGRAPHIC METHODS (p.659)
- I. Analytical or arithmetical iconometric methods (p.659)
- 1. Method of Prof. W. Jordan (p.659)
- 2. Method of Dr. G. Le Bon (p.660)
- 3. Method of L. P. Paganini (Italian method) (p.661)
- General determination of the elements of the Italian photographic perspectives (p.662)
- (a) Orientation of the picture trace (p.662)
- (b) Platting of the lines of direction to pictured points of the terrene (p.662)
- (c) Determination of the elevations of pictured points (p.663)
- (d) Checking the position of the horizon line on a photograph (p.664)
- (e) Determination of the focal length (p.665)
- (f) Determination of the principal point of the perspective (p.665)
- (g) Application of Franz Hafferl's method for finding the focal length of a photographic perspective from the abscissæ of two pictured known points (p.668)
- 4. General arithmetical method for finding the platted positions of points pictured on vertically exposed photographic plates (negatives) (p.668)
- 5. General arithmetical method for finding the platted positions of points pictured on inclined photographic plates (p.671)
- 6. General arithmetical determination of the elements of photographic perspectives (p.672)
- II. Graphical iconometric methods (p.674)
- 1. Method of Col. A. Laussedat (p.674)
- (a) Locating points, identified on several photographs, on the platting sheet (p.676)
- (b) Determination of the elevations of pictured points (p.676)
- (c) Drawing the plan, including horizontal contours (p.677)
- 2. Method of Dr A. Meydenbaur (p.677)
- (a) Determination of the focal length for the panorama views (p.678)
- (b) General method of iconometric platting (p.678)
- (c) Determination of the elevations of pictured points of the terrene (p.681)
- 3. Method of Capt. E. Deville (Canadian method) (p.681)
- (a) General remarks on the field work (p.681)
- (b) General remarks on the iconometric platting of the survey (p.683)
- (c) Platting the picture traces (p.684)
- (d) The identification of points, pictured on several photographs, representing the same points of the terrene (p.685)
- (e) Application of Professor Hauck's method for the identification of points on two photographs (p.685)
- (f) Platting the intersections of horizontal directions to pictured points (p.686)
- (g) Platting pictured points iconometrically by "vertical intersections" (p.687)
- (h) Iconometric determination of elevations (p.689)
- (i) Iconometric determination of elevations by means of the "scale of heights" (p.690)
- (j) The use of the so-called "photograph board" (p.691)
- (k) Constructing the traces of a figure's plane (p.692)
- (l) Contouring (p.694)
- (m) The photograph protractor (p.696)
- 4. Method of V. Legros for determining the position of the horizon line (p.697)
- 5. Method of Prof. S. Finsterwalder for the iconometric location of horizontal contours (p.697)
- I. Analytical or arithmetical iconometric methods (p.659)
- CHAPTER IV - PHOTOGRAMMETERS (p.699)
- I. Requirements to be fulfilled by a topographic surveying camera (p.699)
- II. Ordinary cameras (with bellows) made adapted for surveying (p.699)
- III. Special surveying cameras with constant focal lengths (p.701)
- IV. Surveying cameras combined with geodetic instruments (phototheodolites, photographic plane tables, etc.) (p.706)
- 1. The new Italian phototheodolite, devised by L. P. Paganini (p.708)
- 2. The photogrammetric theodolite of Prof. S. Finsterwalder (p.711)
- 3. Phototheodolite for precise work, by O. Ney (p.712)
- 4. The phototheodolite of Dr. C. Koppe (p.715)
- 5. Phototheodolite devised by V. Pollack (p.716)
- 6. Col. A. Laussedat's new phototheodolite (p.717)
- 7. The phototheodolite of Starke and Kammerer (p.717)
- 8. Captain Hübl's plane table photogrammeter (p.721)
- V. Panoramic cameras (p.722)
- CHAPTER V - ICONOMETERS AND PERSPECTOGRAPHS (p.725)
- Dernière image
636
UNITED STATES COAST AND GEODETIC SURVEY.
IV. THE FIVE-POINT PROBLEM (BY PROFESSOR STEINER).
In the methods just described it had been assumed that tbe position of the caméra station was known with reference to the surrounding points A, B, G. . . . .
In case the panorama pictures were taken from a caméra station of nnknown position and a sériés of known points are pictured upon the panorama views, the position of the caméra station may be found (with reference to the surrounding points of known positions), and the orientation of the picture trace may be accomplished by means of Prof. F. Steiuer’s so-called u five-point problein” (flg. 10), if one of the views contains the pictures of five or more points of known positions.
The panorama view MN may contain the images a, b, c, d, and e of the points A, B, G, D, and E (already plotted upon the working sheet), and also the picture of a suspended plumb line or other vertical (or horizontal) line.
The points a, b, c, d, and e of the négative are again projected upon the straight edge of a paper strip = a1, b1, c', dand e'.
Radiais are now drawn from one {A) of the five plotted points, as a center, to the other four, R, G, -D, and E. The marked paper strip is then placed over the radiais in such a way that
b' falls upon AB, d'falls upon AD, e' falls upon AE,
when the strip will hâve the position ax, bx, cx, dx, ex. The line drawn through A and ax (the latter transferred by means of the strip) will be the tangent in A to the ellipse Ex (passing through A, B, D, E and through the station point S).
The paper strip is now placed over the radiais AB, AG, and AD, so that
b1 falls upon AB, c1 falls upon A G, d'falls upon Alf,
when the strip will hâve the position a2 b2 c2 d2 e2, and the line Aa2 will be the tangent in A to the ellipse E2 (passing through the points A, B, G, D and the station point S).
Le texte affiché peut comporter un certain nombre d'erreurs. En effet, le mode texte de ce document a été généré de façon automatique par un programme de reconnaissance optique de caractères (OCR). Le taux de reconnaissance estimé pour cette page est de 93,60 %.
La langue de reconnaissance de l'OCR est le Français.
UNITED STATES COAST AND GEODETIC SURVEY.
IV. THE FIVE-POINT PROBLEM (BY PROFESSOR STEINER).
In the methods just described it had been assumed that tbe position of the caméra station was known with reference to the surrounding points A, B, G. . . . .
In case the panorama pictures were taken from a caméra station of nnknown position and a sériés of known points are pictured upon the panorama views, the position of the caméra station may be found (with reference to the surrounding points of known positions), and the orientation of the picture trace may be accomplished by means of Prof. F. Steiuer’s so-called u five-point problein” (flg. 10), if one of the views contains the pictures of five or more points of known positions.
The panorama view MN may contain the images a, b, c, d, and e of the points A, B, G, D, and E (already plotted upon the working sheet), and also the picture of a suspended plumb line or other vertical (or horizontal) line.
The points a, b, c, d, and e of the négative are again projected upon the straight edge of a paper strip = a1, b1, c', dand e'.
Radiais are now drawn from one {A) of the five plotted points, as a center, to the other four, R, G, -D, and E. The marked paper strip is then placed over the radiais in such a way that
b' falls upon AB, d'falls upon AD, e' falls upon AE,
when the strip will hâve the position ax, bx, cx, dx, ex. The line drawn through A and ax (the latter transferred by means of the strip) will be the tangent in A to the ellipse Ex (passing through A, B, D, E and through the station point S).
The paper strip is now placed over the radiais AB, AG, and AD, so that
b1 falls upon AB, c1 falls upon A G, d'falls upon Alf,
when the strip will hâve the position a2 b2 c2 d2 e2, and the line Aa2 will be the tangent in A to the ellipse E2 (passing through the points A, B, G, D and the station point S).
Le texte affiché peut comporter un certain nombre d'erreurs. En effet, le mode texte de ce document a été généré de façon automatique par un programme de reconnaissance optique de caractères (OCR). Le taux de reconnaissance estimé pour cette page est de 93,60 %.
La langue de reconnaissance de l'OCR est le Français.