at the same time it drops the pencil onto the pencilled
manuscript, this giving a pencilled document in real
space as to what is already recorded onto the magnetic
tape.
shows the pencil plot, To obtain the butt join between stereo
models, a line is drawn (or photographically exposed) onto the
dispositive from the top to the bottom through the principle point.
The operator, when traversing through the model, stops his
floating mark on the line and records the Y value for that point
onto the pencilled manuscriptimmediately in front of him - then
in the next model, the operator does the reverse operation by
moving the hand wheels, he moves the floating mark up to that
particular coordinate in the Y value and over onto the line seen in
the stereo model, thus placing the floating mark on exactly the
same spot to commence his contouring into the next model.
shows plotting in progress
shows an enlarged photograph placed onto the internal plotter of
the Planimat, For our system we field-edit prior to compilation
such that once the stereo operator has finished his recording of
topographic detail from the stereomodel, he can position himself
approximately with the enlarged photograph and, then by view of
the stereomodel, position his floating mark precisely with the
Stereoplotter, he keypunches the information onto the magnetic
tape to be processed later and drawn by the ADM.