3
METHODOLOGY
3.1 Study Area
The study area of this research is in Karawang, Subang, and Indramayu Regency, West Java Province, where natural resources are abundant in the
province. West Java in the year 2007 has 374.850 ha of technical irrigation rice field, while the rice with semi-technical irrigation has 128.465 ha, and area of rice
with non-technical irrigation has 435.913 ha. In 2007, these rice fields produced 9.952.990
tons of rice where most of the rice was produced in Karawang, Subang, and Indramayu Regency where the total rice production for 3 regencies reaches
3.057.042 tons or 30,7 out of West Java total rice production see table 3-1.
Table 3-1. Rice Production in West Java year 2007 BPS, 2008
Figure 3-1. Location of the research area show in blue color
Karawang, Subang, and Indramayu Regency located at the north coast of West Java Province see figure 3-1. The low land north coast of Java Island is
suitable for rice plantation because of its geological condition and the existence of water irrigation from river dam. The alluvial plane that produced by volcanic
mountains that exist in the middle part of Java Island were spread along the northern and southern coast of the island and creating a low land of fertile land for
agriculture. The low land of north coast of Java Island not only suitable for agriculture,
but this area also becomes the settlement concentration of Java Island. This condition will generate problems in land demand for settlements and for
agriculture. Because of Karawang, Subang, and Indramayu were already consider as national rice barn and rice became the primary regional income, the agriculture
land especially rice would not be converted to settlements but because of the increasing of population in the area, agriculture land cannot be increased in term
of field area. The production of rice in Karawang, Subang, and Indramayu Regency only depends on the variety of rice that has short growing season.
3.2 Data Source
This research will use TERRA MODIS satellite data. The data satellite will be collect by daily since January 2008 up to December 2010. The data were
available for free download from Land Processes Distributed Active Archive Center LPDAAC http:lpdaac.usgs.gov or from the Warehouse Inventory
Search Tool WIST https:wist.echo.nasa.gov
. The spatial resolution of MODIS satellite data used in this research is 250m
by 250m pixel size. This resolution of MODIS data expected to be able to differentiate rice field and non rice field landcover in Karawang, Subang, and
Indramayu Regency. The 250m by 250m MODIS also suitable to view land cover differentiation within small scale resolution map of the research area.
The image acquisition of MODIS data, image processing and image analyzing will be conducted in computer laboratory.
3.3 Methodology
3.3.1 Data Collection
As stated in previous point, the research study will use Terra MODIS satellite imagery data. The acquisition of MODIS data will download with free of
charge from specific website. One requirement to make MODIS data available is the availability of high speed internet connection to download the data.
All the data are available freely from the Land Processes Distributed Active Archive Center LPDAAC http:lpdaac.usgs.gov or from the Warehouse
Inventory Search Tool WIST https:wist.echo.nasa.gov. Because heavy clouds may affect the quality of the images, the 16-day composite surface reflectance
images might have more opportunities to avoid the impact of clouds than the daily collected ones. The changes within every 16-day can be ignored and the temporal
coverage frequency is fit for the seasonal change detection. Therefore, this study used the 16-day composite surface reflectance images to overcome the cloud
problem. Each pixel in the 16-day composite images is the best one in quality within every 16 day on the basis of high observation coverage, low view angle,
the absence of clouds, cloud shadows and aerosols http:modis-
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