The district has a literacy of 76.90%, higher than the state
average.
1.2. Thiruvallur Town
Thiruvallur is about 44 km from Chennai in Tamil nadu
with a population of 1300000 , covering 10 sq km area,
near our college and which was once a Sub Division, i.e.
Taluk head quarters in Thiruvallur District till 1991.
Population density of Thiruvallur has more than doubled in
the past three decades. The town a population density of
300 persons/sq.km in 1951, population density rose to 6000
persons/sq.km in 1981 and 8600 persons/sq.km in 1991
and it has crossed 13000 per sq km in 2011
1.3.Enviroinmental issues
Due to creation of District administrative, police and
judicial head quarters of Government Departments, major
industries like Caterpillar, Kingfishers. Hindustan Motors
etc and up gradation of it as District Municipality resulted
in addition of urban infrastructure, drainage, conversion of
Agriculture land and lakes as housing colonies etc The
sewage also some times drains in tanks in rainy season. The
lands near water spread are developed as housing plots
disturbing the natural drainage system. The new housing
colonies are flooded even for small intensity of rain fall.
The urbanization of the town and villages which had
narrow lanes developed for bullock carts movement are
used by motor vehicles and two wheelers. Under ground
drainage schemes are now under implentation in Tiruvallur.
Till then the town has to depend on disposal of Night Soil
is normally by way of individual facilities and liquid waste
(Sullage and Kitchen Waste) is through the open drains.
The main mode of individual disposal in the town is
through 4613 septic tanks, low cost sanitation units and
through public conveniences. There are 11 Private hospitals
with 6 to 11 wards apart from Govt District hospital, 8
Medical Labs, 20 Pharmacy, Blood banks, Eye banks,
Ambulance in Govt and Three private hospitals.
2. RESEARCH
Waste water disposal, drainage problems in the event of
rains, encroachment of tanks, stagnant water bodies which
are the breeding ground for mosquitoes and insects,
interference to ancient planning of this religious historical
towns and villages by haphazard modern housing urban
development are studied and highlighted in this paper to
demonstrate the use of high resolution data for creation of
environment management GIS.The study has been taken up
to understand the environmental issues to protect these
areas. This research has been taken up using Cartosat 1
LISS 4 MSS data of Resourcesat 1, Google earth Geo eye
data.The high resolution Indian satellite data are used for
urban planning and creation of GIS for health,
environment, town planning, and drainage system
2.1.Cartosat and Liss IV Resourcesat data
An attempt has been made to demonstrate the use Indian
satellites data merged Cartosat 1, PAN 2.5m resolution
stereo data dated 27^" March 2007 with Resourcesat, Liss
4, 5.8 m, Resolution multi spectral data dated 11 Jan 2005
to create high resolution imagery of part of Thiruvallur
town and it’s neighborhood. The Google earth Geo eye
data is used to update the latest land use as on 2011.The
segment covering the part of Thiruvallur town in Tamil
International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XXXIX-B8, 2012
XXII ISPRS Congress, 25 August — 01 September 2012, Melbourne, Australia
Nadu from the Temple Tank of Sri Veeraragavasamy
temple to West of National Highways from Thiruvallur to
Tirupathi is selected for the study (Fig 1) to create Health
GIS to demonstrate the use of high resolution Indian data
for local urban planning to understand the Health and
environmental problem areas to take remedial action by
concerned.
y Tiruailur North vvest-
+
Cartosat *Liss 4 merged data
Figure.1.Segment of the PAN &LISS 4 merged image of
study area
While Arc GIs 10 software is used to create
different themes and Lieca photogrammetry GIS software
is used to create the contours to add topographical features
of the study area from the Cartosat 1 streo data.
Resourcesat data of Liss 4 was useful in mapping with ease
the agriculture lands and other natural resources like
gardens, water bodies ,urban areas, roads ,paths etc as the
data is in colour. In fact the merged data in true colour is
very much useful in digitizing various layers to create the
Environment and Health GIS.
2.2. Agriculture lands & Gardens
Figure.2. Agriculture and Garden Lands
The study area has irrigated farm lands of paddy, mango
groves and tree plantations areas apart from dense
populated urban area.These two layers are given in fig 2.
The irrigated agriculture lands and grooves have stagnant
water in rainy season and irrigated paddy season. These
areas are breeding grounds of insects and mosquitoes etc
and creates problems like fever and cold. The irrigated
agricultural lands also have reptiles like snakes which
causes hazards like snake and insects bites. The undulating
terrain condition adds to the surface drainage problems and
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