An Elementary Treatise On Phototopographic Methods And Instruments Including a
The book An Elementary Treatise On Phototopographic Methods And Instruments Including a was written by author John Adolphus Flemer Here you can read free online of An Elementary Treatise On Phototopographic Methods And Instruments Including a book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is An Elementary Treatise On Phototopographic Methods And Instruments Including a a good or bad book?
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The idea of combining surveying instruments with a camera into a compact and serviceable apparatus originated very early with phototopographic workers. Refined phototheodolites are to this day the favorite photographic-surveying instruments not only in Europe, but they are also widely in use in other countries, particularly when these are dependent on European mechanicians to supply the demand for instruments of precision. Phototheodolites have been devised to secure great precision in the resu...lts obtained with them; refined methods are largely employed in the field observations in the culling of data from the photographic perspectives, and in the computations. Generally speaking, the best results for topographic pur- poses are obtained by methods that have been devised with due reference to the fact that phototopography essentially and primarily is a constructive or graphic art, based on graphic or pictorial records, in the form of perspectives, that are to be transposed into orthogonal projections in horizontal plan, instrumental observations being required only to furnish such elements as may be needed to facilitate the graphic trans- position of lines of direction and distances, to insure accu- racy, and to obtain certain checks or a proper control for the work in its entirety.
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