01267cam a22002531  4500001001300000003000400013005001700017008004100034010001700075035002000092040004100112042001200153050002200165082002000187110002900207245016400236260002300400300004000423440003600463500044100499650002800940650002800968999001700996gs 53000080 DLC20260227111359.0850718s1952    dcua         f000 0 eng c  ags 53000080   a(OCoLC)12280026  aU. S. Geol. Survey. Libr.cTxHRdDLC  apremarc00aQE75b.C5 no. 222  a526.91a526.98*2 aGeological Survey (U.S.)10aTwin low-oblique photography and the Twinplex plotter,cprepared by the Topographic Division, Research and Technical Control Branch, Section of Photogrammetry.  aWashington,c1952.  aiii, 18 p.billus., diagrs.c27 cm. 0aGeological Survey circularv222  a"The text of this circular is an adaptation and combination of the following papers: 1. Hopkins, B. T., 1951, The Twinplex plotter for low-oblique photography. [Unpublished] 2. Radlinski, W. A., 1952, Convergent low-oblique photography and its application to the Twinplex: Photogrammetric engineering, v. 18, no. 3, pp. 596-597. 3. Thompson, M. M., 1950, the Twinplex, a new stereoplotting instrument; U. S. Geological Survey Circ. 82." 0aPhotographic surveying. 0aSurveyingxInstruments.  c28714d28714