855
as used
>sure Film Remarks
:r advan
cing
Motor non-
drive metric
SLR
Manu- non-
ai metric
SLR
Manu- non-
a 1 metric
SLR
Manu- non-
a 1 metric
SLR
k Motor- non-
ai i s ed metric
sure SLR
r
k Motor- metric
ai i sed
sure
r
of Filter Exposure
jo- used settings
5
sky f/8
light 1/500 sec.
It
f/8
1/500 sec.
II
f/11
1/500 sec.
ft
f/16
1/500 sec.
It
f/11
1/500 sec.
II
f/8
1/500 sec.
II
f / 5,6,1/
500 sec.
II
f/16
uv
1/200 sec.
f/8 1/
500 sec.
Yellow f/5,6,1/
500 sec.
It »1
possible. Rohini
:hing international
iifficulties of gett-
. In many cases,
lit to which the
' fly higher upto
es which will natu-
hat SFAP could be
5, if the flying
o 3000 feet. Dur-
t. Office, genera-
M OF DATA
imes, were made
nts were studied
several areas
lums
Slide-1 illustrates the presence of a large number of
huts. The area is fast becoming a slum even in a new
colony
. unauthorized construction of boundary walls on many
plots of land nearrMongolpur village,. The area south
east of village has a large nunberof boundary walls.
These are all unauthorizedly constructed with a view
to build temporary hut inside the premises. The rrodus-
operandii follows the pattern: boundary wall, temporary
structures, perhaps selling of plot at this stage, perma
nent structure. Slide-2 refers.
. condition of storm water drains in Rohini area and soil
erosion near the drain
. progress of construction in the area, quantity of cons
truction material stocked on the road sides - Slide-3.
. location of borrow pits for construction of roads in
Rohini colony
. general land use status in the area.
The Project Manager was so impressed with the extense
and intensity of information on a synoptic basis that he
desired photography every 3 months or so for proper moni
toring of land-based activities in his area. He also reali
zed that in case of unauthorized structures where he
foresaw legal action, the aerial photographs provide irrefu
table evidence in any court of law.
3.1 Difficulty in navigation was experienced
. Mosaic of post card size enlargements done quickly on
a soft board showed the quality of flying to the pilot.
This aspect itself kept the pilot on best possible state
of his flying performance. It is desirable to have
basic navigation aids even if the aircraft is very small
of 'microlight'. Navigation remains most important
'bug' in small format aerial photography.
4. EXPERIENCE WITH SFAP FOR PHOTOGRAMMETRIC
SURVEY OF A SMALL AREA
Several requests are made by urban authorities, industries,
slum upgradation officers, wherein they wish to quickly
get surveyed plans of a small area. Generally, it is plani
metry in which they are most interested.
We used MK-70 Hasselblad metric camera black and
white film to generate a plan on 1:2 ,000. MK-70 negat
ives were enlarged 4 times and by affine plott
ing we got 1:2,000 plan of the area. The plan was check
ed on the ground for planimetry by using EDM instruments.
Although, statistically, the sample was not large, we got
an accuracy of R.M.S. of 0.2 metres. We propose to
carry out these experiments further and ascertain the
errors more thoroughly.
5. CONCLUSION
The experiment of SFAP over Rohini has shown promise
and the town planning community is very keen to adopt
this technology for regular monitoring of selected urban
phenomenon, specially technolegal situations on the grou
nd. It is also our opinion that for small areas, we should
be able to generate survey plans. However, at present,
we advocate the use only for updating the base maps.
SFAP is a technology of generating information which
can be produced quickly and very economically.
The author acknowledges the assistance of Shri R.P.Kala
in photographic operations.
The author also acknowledges the base provided by the
earlier experience of SFAP namely, small format flying in
Bangkok by Royal Thai Air Force under the guidance of
Prof.M. Juppenlatz of ITC (6) and SFAP in Kenya (Tana
River study) by D.H.V. Consulting Engineers of Netherlands
(12), and experiments of Mr. Paul Hofstee of ITC at
Bandung, Indonesia (5).
REFERENCES
1. Aziz, Lukman. The use of small format aerial photo
graphs in the production of large scale maps (e.g.
1:2,000) of urban areas in regions of moderate relief,
with particular reference to the requirements of deve
loping countries. M.Sc. Thesis. Enschede, The
Netherlands. May,1982.
2. Clegg,R.H. 1975. A comparison of 9 inch, 70mm and
35mm cameras. Photogrammetric Engineering and
Remote Sensing, Voi.41, No.l2,pp 1487-1500.
3. Everitt,J.H. and Nixon,P.R. 1985. Using colour aerial
photography to detect camphorweed infestations on
south Texas range lands. Photogrammetric Engineer
ing and Remote, Sensing,Vol.11,No.11, pp.
4. Graham,R.W., Read,R.E. and Kure 3. 1985. Small for
mat microlight surveys. ITC Journal 1985-1 pp 14-20.
5. Hofstee, P. 1984. Small format aerial photography for
human settlement surveys, the technique - paper yet
to be published.
6. JuppenIatz,M. et al. An innovation in aerial photogra
phy for development planning. 1985. Case study -
Metropolitan Bangkok. Joint exposition with Thai
officials.
7. Killmayer,A. and Epp,H. 1983. Use of small format a
aerial photography for landuse mapping and resource
monitoring. ITC Journal 1983-4. pp 285-290.
8. Lord,J. 1980. Oblique and vertical aerial photography
with the Hasselblad, aerial photography. Hasselblad
publication.
9. Misra,P. 1985. A plea for small format aerial photogra
phy in India - a note. Technical paper - National semi
nar on remote sensing for planning and environmental
aspectsof urban and rural sett 1 ornent, VishaWiapa tnam,
India.
10. Nancy,L.M. and Merle,P.M. 1981. Application of 35mm
colour aerial photography to forest land change detec
tion. Eighth biennial workshop on colour photography
in plant sciences and related fields. The American
Society of Photogrammetry.
11.Small format aerial photography for urban planners.
May, 1983. The use of aerial photographs for townn
planners. Annual conference. Institute of Town Plan
ners, India.
12.Tana River Remote Sensing Study, Kenya by D.H.V.
Consulting Engineers, May, 1985.
