23
3.4 Methods
The research of land use change modeling would be developed in Siak District that might facilitate the understanding of the process of land use change
and its relevant factors in the research site. Land use change modeling in Siak District would be conducted in four main activities:
1. Field data collection,
2. Land use classification,
3. Land use change detection, and
4. Land use change modeling.
LAND USE CLASSIFICATION
LANDSAT 7 ETM+ Images
time series
Land Use Maps
time series LAND USE
CHANGES DETECTION
Land Use Change Maps
Relevant Factors of Land Use
Change
Land Use Change Model
LAND USE CHANGE MODELING
Land Use Change Driving
Factors
2
3
4
Result of Model
Validation FIELD DATA
COLLECTION
Sample of Land UseLand Cover
1
Start
End
Figure 4. General flow chart of the research
24 Field data collection was intended to collect LANDSAT images 2002,
2005, and 2008, relevant driving factors of land use change, and sample data of land useland cover in Siak District in the form of primary data by collecting
samples using GPS and secondary data of land useland cover originated from other institutions. These sample data would be used as reference data in land use
classification activity. During field data collection, non-spatial data were also collected.
Land use classification was done in order to produce land use maps of Siak District. Then, the land use maps, that have been produced, would be
processed in the land use changes detection activity to produce land use change maps and the transition and probability matrices of land use changes. The land use
change maps was used as dependent variable in logistic regression modeling to determine the land use change driving factors and also produce land use change
model. The general flow chart of land use change modeling in Siak District is shown in Figure 4.
3.4.1 Field Data Collection
Field data collection in the form of sample of land useland cover of Siak District was done by using Global Positioning System GPS to record
geographical coordinates of samples of land useland cover. Field data collection was conducted by using simple random sampling that is appropriate with the
target of land useland covers which have been defined and may represent all land uses in Siak District. Furthermore, this activity also collected secondary data, such
as LANDSAT images, and land useland cover from previous years in the form of maps or coordinate points which have been used as reference in conducting land
use classification of 2002, 2005 and 2008. In this field data collection, non-spatial data in term of demography data
were also collected, directly through interviews and indirectly through secondary data from related institutions. These data may represent the socio-economic
condition of people living in the research area, and can be considered as relevant factors that drive the land use changes in Siak District.
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