along each
ng these key
pe of each key
eof the area
ep triangula-
hematically
as a block
use of the
e time giving
ild A6 and A8
f this Depart-
pattern,
ıt compilation
is place a
‚es examined,
developmental
i mapped at
ne metropolitan
ind planning
ring each
ographie re-
hotography of
e Government
raphy was
Initial
nch lens at
apping and
inch wide angle
Wild RC7 plate
areas required
photograph the
hical maps, are
being suitably
mplete coverage
ss of topographic
led by the
which also
3 been published,
v 15 minutes of
2 centre of
strips.
nd, with suitably
t on each of
strips a bridge
st runs, An
of detail and
ipment.
where develop-
Hh 5 or 10=Pt
15
contours is plotted with Wild equipment, This is generally done within a dense pattern
of ground control, This series shows the topography and cadastral pattern and are used
by the various state government departments for planning or design of the particular pro-
ject under consideration, Approximately 200 square miles of this series has been produced
In addition 300 projects at scales varying from 4O ft to 1 inch to 10 chains to 1 inch with
2 and 10 ft contours have been similarly produced for such pro jects as hydro-electric
schemes, determination of over-burden on coal deposits, highway location, timber assessment,
water conservation and irrigation and road and railway alignment,
Department of Lands, South Australis
The Photogrammetric Section within the Department of Lands, South Australia was
established in 19.9, At the beginning of their activities aerial photography was flown
under contract by private enterprise for the preparation of planimetric maps and mosaics.
Since 1952 it commenced its own aerial surveys and at the present time aircraft
is chartered and the department supplies air cameras, navigational aids etc. and personnel
to operate such instruments, In addition it has a photographic laboratory for the pro-
cessing of negatives and prints, Cameras which are used for these tasks are Wild RC5 with
li$ ineh and 8% lens, irm general photographie coverage of State at a seale of 1:50,000 to
1:60,000), Wild RC7a (plate) with l| ineh and 63 inch lens (for use for all large scale
mapping with photography at a seale of 1:4,000 and standard topographical mapping at
approximate scale of 1:63,000) and a Williamson Eacle IX with 25 inch lens (for the pro-
duction of large scale mosaics of special projects).
Photography for standard mapping is flown in blocks as large as possible and a
unit is considered as measuring 30 minutes of longitude by 15 minutes of latitude. In
this area the usual key strips are flown along the western and eastern edges with parallel
strips of photography running east and west. In planning such flights a mosaic is made
of existing photography which is used to mark the ideal position for each exposure; camera
is then exposed singly over these points.
Photomaps of each area are made and reproduced at a scale of 1 inch to 1 mile.
Rectification of somephotography is carried out by means of a Wild E2 rectificer.
This department has selected the following equipment for all of its mapping tasks:
3 = Wild A5 autographs, 4 - A6 stereoplotters, 1 - Wild PUG Point Transferror Device and
1 - Haag-8treit Co-ordinatorgraph,
Standard topographical mapping is produced at a scale of 11%1,680 with 25 feet
c
contours, In addition to the topographical information, portion of the cadastral pattern
is also shown, Bridging between ground control with A5 Autographs is the normal method
employed and after adjustment is plotted by A6 stero-plotters,
Control, which is pre-marked on the ground by a 12 feet black square surrounded
by white strip 6 feet wide prior to photography is established in the four corners of each
area, Bridging with the A55 over the East - West runs, consisting of approximately 15
overlaps, is carried out for horizontal position, whilst a bridee of approximately 6 over-
laps between groups of three heights on every run is also undertaken for vertical position.
A block adjustment of the horizontal position is done by the Bervoets methods (see annexure
D) whilst the normal strip adjustment by graphical means is employed for heights.
e
In isolated areas beyond the range of the National Geodetic Survey a small amount
of topographical mapping has been carried out usin al spider templates. These tem-
plates are assenbled within established control and photo co-ordinates are subsequently
transferred to the A6 steroplotter for plotting of detail,
4
Various project works for large scale topograhpical mapping at scale
with 5 ft to 20 TL contours and 1:180 un 2 ft contours have been plotted for use of
town planning, public works, water conservation, highways railways, ete,
LIVW ALY De
This department has the facilities for lithographic reproduction,
Department of Lands and Survey, Western Australia
This department established branch within its existing organisation
shortly after World War II and has bee: tively engaged in topographical mapping ever
since,
With the present rate of activity,this State will soon have complete. photo cove-
rage, Present photography is flown using the Department's own Zeiss RMK eamera fitted
with 6 inch Pleagon lens or Williamson Eagle IX using Ross 6 inch wide angle lens, Air-
craft is chartered from a loca company whilst the department supplies the usual camera
operator, navigator and assistant.
For mapping purposes a policy has been adopted that the small, closely settled
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