6h
forestry is the insertion of additional detail into basic frame-works produced by the map-
ping authorities. As an example, the New South Wales Forestry Commission use base maps
provided by the Lands Department and photo coverage controlled by high order accuracy
machines to plot topography (contours and drainage patterns) and farest type boundaries
using a Zeiss "Stereotope" and a Som "Stereoflex", Actually, the machines involved in
this example are necessary to cope with the exteme topographic changes present in the areas
under consideration, Normally less complex instruments are used for this type of work,
The greater part of the forest area of Australia has been covered by aerial photo-
graphy either by the Royal Australian Air Force or private air survey companies under con-
tract. The scales of the photos vary a great deal and the quality of the photos in many
cases is rather poor. This is the type of basic material the forester has to use and
under many cireumstances, they are not good enough.
tandard, and if flown
arranged to suit
lifferent avenues of
een of a much
print, cc.»
of photography
hem in the next
More recent photography 1
for forestry purposes alone, tl 3
the partieular job. Of
forestry usage. and we wil!
1e
Interpretation
Tt. in the field of photo interpretation that the air photo finds its major
application i furnish a remarkable amount of information
when in the The photo t is ired to trans-
late the can all unders - under review,
forestry
discove te rapidly, but
the more important en wi liscussed th
following spring
1, Interpretation of numerous variables relating to the nature of the r stand,
c ( 9 c ; e ai ce acanpistinoann«<«
SC, BE, \ 8 Species or Speeies associations,
T 3 Sit ^ (T ac
0) ite Cc.ass.,
(c) Number of tree cr S,
( 4
(d) Crown closure or density.
(e) Tree heights.
(f) Crown diameter.
(= rand are
(g Stand area,
(h) : Stand size class.
f= 3 1 1
(i) C1 conditi (he Lth),
2. Location oi [S re-lookout ( > nd r c ruct io? it 2
2. Rire, insec! nd ] ] d ¢ praisals,
} e
lo Offic:
S a € C 11 LI TM 3 1 ! Y ] F C
example ] Py, certail € 11 i tl
forest in >, density, 'S tc.) ned | order b. tl ol
area can be int p trata, T tails, wl | t ; 7
geographical FE Li rest, xt r : i tr ; c.
Of par i rr i 1 " 1 e
poses under
: { + n pe nc tot c
; J "n 4 :
| l,
T 4. } +
i À f 1
| rest ]oon? T ]
à ^P OY 1 | t ridge? at
topography?
OS Y ( t Od 1 l tion Y t
Of f i .
t A + "c 1 1 y 1 4 N
3t ; | = 1 : {tn Aust]
wh
su
na
ar
gr
not
cas
as
ECC
foi
