-B8, 2012 
Taragavasamy 
Thiruvallur to 
create Health 
on Indian data 
e Health and 
lial action by 
  
  
zed image of 
sed to create 
GIS software 
hical features 
streo data. 
ing with ease 
esources like 
ths etc as the 
true colour is 
; to create the 
nds 
addy, mango 
from dense 
iven in fig 2. 
have stagnant 
eason. These 
losquitoes etc 
The irrigated 
snakes which 
he undulating 
problems and 
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 
stagnation of water etc These layers are correlated with the 
municipal ward map of this segment of the town. 
3. URBANAISATION 
The Town is growing in western and southern 
direction after the location of the district collectorate. 
Hence urbanization is the major issue to be considered 
while creating the health GIS. The fig 3 details shows 
Thirutani — Thiruvallur national highway and Uttukkottai — 
Thiruvallur state highway. 
Thrivallure NE - High way & Concrete Roads 
F 
L 
| m extre o 
dm NUS E [7773 Road.shp 
À 
> 
Figure.3.Highways in Study Area 
3.1.Built up area 
The old street houses, some of them are with 
remodeled houses without proper ventilation and drainage 
and built closely in narrow streets which were once used by 
bullock carts. These houses adds to the problem of 
environment and drainage. The layers of houses and vacant 
housing plots area are added to the road layer. The three 
layers are given in fig 4. These new housing plots are 
created by conversion of agriculture lands. This data is 
given in as a separate layer. The new house plots are in 
low lying areas. They have mud roads, drainage problem 
and have stagnation of water in rainy season and creates 
health problems. The local municipality is taking action to 
improve the roads and sewage drainage by laying under 
ground drainage to solve the health hazards because of 
open drainage channels in the streets. 
3.2. Marriage halls, Public gathering places 
The study area has more than 14 marriage function halls, 6 
hotels and 4 mosques, 6 schools , four churches , two police 
station and part of Thiruvallur market. Apart from these 
The Veeraragavasmy temple and seven small temples are 
this area visited by Devotees going to Sri Vekateswara 
Thirumala Thirupathi Temple for various functions. The 
area needs care of environmental and health hazards 
issues to protect public gathering 
The GIS of town will assist the concerned to manage the 
environmental and health hazards issues. It will also assist 
maintenance of the town by furnishing the data to get rid 
of open drainage channels, maintaining public gathering in 
several places for festivals and functions with proper 
planning for urbanization etc. The Figure 5 indiacte the low 
lying areas , the old town and the housing plots area. The 
paddy fields with crop and without crops and gardens can 
also be seen. 
Thrivallure NE - High way & 
Concrete Roaris, Contours 
ier 
i! 
    
Figure.4. The Slope of study Area — Contour interval 1m 
Trrunsl Lr HAR Hommes 
  
Figure.5.. Urban lands with buildings.roads,kutcha roads, 
tank and water bodies in the study area. 
4. THE SATELLITE DATA WITH ALL GIS LAYERS 
  
  
Figure.6. All GIS layers with satellite data 
4.1.Zonation to solve health issues 
Based on this study the pilot area is delineated in to zones 
as detailed in Figure 7 to monitor and manage the health 
and environmental issues. The zones are agriculture lands, 
Villages, old town, housing plots, layouts, new housing 
colonies etc. This grouping will make help the 
implementing agencies to draw a plan to solve the 
environment and health issues.