. Collected reprints, Essa Institute for Oceanography. Oceanography Figure 5-2b. Contours drawn on one of the stereopair in fig. 5-2a. Contour interval, 15 mm. Also, by moving the reference point along any horizontal line and adjusting it vertically — noting dial readings and x-y coordinates — any desired cross section of the image can be drawn. Fig. 5-2 shows contour map and section profiles constructed from the respective stereo- scopic pairs using the above method. Fig. 5-3a shows a stereoscopic pair from which the contours of fig. 5~3b were constructed. The size of the photog
. Collected reprints, Essa Institute for Oceanography. Oceanography Figure 5-2b. Contours drawn on one of the stereopair in fig. 5-2a. Contour interval, 15 mm. Also, by moving the reference point along any horizontal line and adjusting it vertically — noting dial readings and x-y coordinates — any desired cross section of the image can be drawn. Fig. 5-2 shows contour map and section profiles constructed from the respective stereo- scopic pairs using the above method. Fig. 5-3a shows a stereoscopic pair from which the contours of fig. 5~3b were constructed. The size of the photographs and illustrations was altered to fit these pages. Actually, contouring is done on a much larger scale than shown here; somewhere in the neighborhood of one square meter. The contour intervals and cross sections shown were chosen for no other reason than to demonstrate the technique. Intervals could just as well have been larger, smaller, or irregular depending on the purpose. Likewise, the cross sections could have been located anywhere and oriented in any direction. Furthermore, any object, regardless of its orientation with respect to the coordinate system, can be dimensioned provided that it has sufficient definition in the projected image. The absolute accuracy of measurement of the instru- mentation used for preparing the accompanying drawings is better than one part in 2,000. Level datum or coordi- nate axis orientation is dependent on the assumption that the plane of the photograph is perpendicular to the gravity vector. Level data could be incorporated into the. Figure 5-2c. Enlarged contour map of the sand ripples in fig. 5-2a. Contour interval, 15 mm. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Institute for Oceanography; Atlantic Oceanographic Laboratories (U. S. ); Pacific Oceanogra
Size: 1501px × 1664px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionamericana, booksponsorlyrasismemb
