Time and Research Location

21 policies and the land management plans of Bengkalis District as mother district. Since 2002, Siak District has started to manage their district independently. Geographically, Siak is situated in 0°21’19.50” - 1°14’43.87” north latitude and 100°54’46.31” - 102°58’27.34” east longitude and located between 0 - 110 m above sea level. Siak neighbors with Bengkalis District in North, Kampar District and Pekanbaru Municipality in South, Rokan Hulu District in West, and Bengkalis and Pelalawan District in East. Siak is loacated in Siak Watershed with Siak River as the main river. The landscape of Siak mostly is wetlands, and only little part in west side is hilly. The majority of Forest land in Siak District is Peatland Forest. Based on the spatial analysis, Siak District has area about 868,117.82 Ha, and about 59 of the total area is allocated for crop and timber plantation and 9 for production forest. Furthermore, Siak Government has also allocated land for other uses such as agriculture area. There are two types of agriculture area in Siak: wetland agriculture and dry land agriculture. The preeminent commodities of crop plantation, which are managed, are rubber, oil palm, coconut and coffee which are run by private company and community. Siak also has large oil and gas resources, incorporated by international company which contributes in increasing the economic growth there Siak District Government 2008.

3.2 Data Source

Data required in this research were divided into two categories: spatial data and non-spatial data. Spatial data can be distinguished into two types: raster and vector data. Raster data, which were used in this research, is LANDSAT 7 ETM+ LANDSAT images year 2002, 2005, and 2008. LANDSAT images would be interpreted to produce land use categories data year 2002, 2005, and 2008 which would be used either as object of the study land use change or relevant factors of land use changes. Other raster data used were SRTM-DEM 90m of Siak District that would be processed to produce altitude and slope data. Vector data consisted administration boundary, land useland cover data from previous years, infrastructure development such as road and market place, river 22 map, spatial planning data, and other relevant vector data which might be useful for modeling land use change in Siak District. Non spatial data in this research functioned as supporting data that were considered as relevant factors that might drive land use change in Siak District. Non spatial data used was demography data, such as population and population density, which might represent the socio-economic condition of people that live in the research area. The organization of the data is listed in Table 3. Table 3. Organization of the data No. Data Category Data Type Data Source