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Manuscript Title: STLPLT-CALCOMP plot of crystallographic projections of Laue photographs.
Authors: M. Canut-Amoros
Program title: STLPLT
Catalogue identifier: AASA_v1_0
Distribution format: gz
Journal reference: Comput. Phys. Commun. 1(1970)293
Programming language: Fortran.
Computer: IBM 7044.
Operating system: IBSYS.
RAM: 40K words
Word size: 32
Peripherals: magnetic tape, graph plotter.
Keywords: Crystallography, Metallography, Laue method, Stereographic and Gnomonic Projections.
Classification: 8.

Nature of problem:
The program is designed to evaluate and plot the stereographic, stereognomonic and gnomonic projections from Laue photographs obtained with cycindrical, flat transmission or back reflection techniques.

Solution method:
From the x,y coordinates of the Laue spots measured on the film, the rho, theta and the X, Y coordinates of the poles are calculated for the stereographic, stereognomonic or gnomonic projections. Cylindrical, flat transmission, or back-reflection Laue techniques can be used. The selected projection is plotted in a circle of 100 mm radius for any desired radius of the reference sphere. The blind zones of the experimental record determined by the film size and the backstop are also plotted on the projection.

Running time:
On the IBM 7044 at Southern Illinois University the loading and assembly of the program requires 1.50 minutes. The execution time is dependent on the number of Laue spots. The execution time is dependent on the number of Laue spots. The execution time for the test run with the three plots was 2 minutes, 5 seconds. The plotting time on the CalComp plotting system 470/565 at the Materials Science Laboratory for two maps of the test run was 4 minutes.