The stretched tapeline afforded a basis for
estimating any deviations from a straight line which the wall presented,
and as each sight was plotted on the spot these deviations are all
recorded on the plan, and afford an indication of the degree of accuracy
with which the building was carried out. Upon the basis thus obtained,
the outlines of the second stories were drawn by the aid of measurements
from the numerous jogs and angles; the same process being repeated for
each of the succeeding stories. The plan at this stage recorded all the
stories in outline. The various houses and clusters were connected by
compass sights and by measurements. A tracing of the outline plan was
then made, on which the stories were distinguished by lines of different
colors, and upon this tracing were recorded all the vertical
measurements. These were generally taken at every corner, although in a
long wall it was customary to make additional measurements at
intervening points.
[Illustration: Plate XVII. View of Hano.]
Upon the original outline were then drawn all such details as coping
stones, chimneys, trapdoors, etc., the tapeline being used where
necessary to establish positions. The forms of the chimneys as well as
their position and size were also indicated on this drawing, which was
finally tinted to distinguish the different terraces. Upon this colored
sheet were located all openings. These were numbered, and at the same
time described in a notebook, in which were also recorded the necessary
vertical measurements, such as their height and elevation above the
ground.
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