This rural push(Breese 1969).Traditionally, India’s urbanization pattern is an

This
type of change can be regarded as largely cosmetic and the underlying
processes of urbanisation and the overall structure of the city
remained largely unchanged

(Hall,
1998). To understand the mechanism of urbanisation

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of
a particular region, it is necessary to understand the

growth
of its satellite towns and the trend of its urbanisation

and
its role in the growth of regional economy and how they

contribute
to development of city centre. (Xiaowen Li, 2010)

The
basic premise in using remote sensing data for change

detection
is that the process can identify change between

two
or more dates that is uncharacteristic of normal

variation.(Muc-honey
and Haack, 1994; Singh, 1989;

Shalaby
and Tateishi,2007).Remote sensing allows

retrospective
viewing of earth’s surface, and time– series of

remote
sensor data can be used to develop a historical

perspective
of an urban attribute or process which can help

examine
significant human or natural processes that act over a long time.

Urbanization
in India is as pseudo urbanization were in

people
arrive to cities not due to urban pull but due to rural

push(Breese
1969).Traditionally, India’s urbanization

pattern
is an illustration of highly polarised and spatially

unbalanced
urban system with sharp core-periphery

differences.
However, recent trends show that urban

industrial
interaction fields are spreading through linking

rural
areas and also small towns around the mega cities and

urban
corridors are emerging along the transport routes

(Chattopadhyay
S., 2007).

Kerala
shows a distinctive pattern of rural-urban continuum

throughout
the state where it is difficult to demarcate urban

and
rural area, it presents a different picture in the matter of

urbanisation
from the rest of India due to dispersed nature of

settlements,
growth of tertiary sector and unique rural-urban

continuum
manifested throughout the state. Ernakulum is the

most
urbanised district in the state in terms of absolute

number
of urban population (2234363 population as per

2011
census). Cochin city region encompasses most of

urban
centres in the Ernakulum district; economically active

region
in the state.

The
present study addresses urbanisation in both spatial and

temporal
contexts and explores urban expansion of the

Cochin
city and satellite towns as well as their interaction in

the
regional urbanisation. Three sets of LANDSAT images

were
used and GIS based buffer system was established

covering
the central and major satellite towns of Cochin.