DEGREE MEASUREMENT EXPEDITION:
The measuring instruments
The measurement sites
De Maupertuis and Camus were the first to set up the aiming device
at the Aavasaksa fell. Aavasaksa became the central place for the measurements
as accommodation was available at the Ylitornio parsonage. The wide
area south of the river Tornionjoki flowing at the foot of the Aavasaksa
fell offered good opportunities for measuring the base line on the river
ice in the winter. The devices of the aiming line, however, were erected
already in summer.
Thus the angular measurements from Aavasaksa to Luppio and Poiki-Torni
could be carried out at the end of August.
Aavasaksa - 8th July 1736
Mount Avasaxa is situated in the best peopled and finest part of the
river : its bed, above all, towards the south, for the space of four
or five leagues, is extremely wide, and offered the most proper spot
we could desire for an excellent base, whose extremities would be visible
from Cuitaperi and Avasaxa. This base could not be measured at any other
time than in winter over the ice ; but it suited to fix upon it, and
erect signals at its extremities, to join it to the triangles, and to
make the necessary observations before winter came on.
(Outhier, Journal of a voyage to the north 1736-1737, p. 284)