Judul: Distribusi Spasial Tanaman Padi Dan Estimasi Produksi Dengan Menggunakan Citra Modis Evi (Study Kasus Kabupaten Karawang, Subang, Dan Indramayu).
Abstrak: Indonesia is one of the rice producers in the world and most of the rice fields is located in Java Island which have the productivity of 60% of nearly 4 x 106 ton of rice (Amien et al., 1996). Rice in Indonesia generally is harvested twice a year (80-90 growing days) in well irrigated areas and harvested once a year (100-130 growing days) in non-irrigated areas (Indonesian Agency for Agricultural Research and Development, 2009). In Indonesia rice usually planted in the beginning of rainy season in October - December then to be harvested in February (Directorate General of Food Crops, 2009). Optical satellite remote sensing provides a viable means to meet the requirement of improved regional-scale detection and mapping of rice fields. Changes in plant phenology are considered to be a most sensitive indicator of plant responses to climate change observable on remotely sensed images (Linderholm, 2006). Vegetation Indices (VI) has proved particularly popular in the monitoring and characterization of plant cover. VI is used to diagnose and predict crop behavior over time and has been implemented by Potgieter et al. (2007) and Xiao et al. (2005) by using multi temporal Enhanced Vegetation Index (EVI) from MODIS imageries to estimate crop areas. The EVI will take full advantage of MODIS measurement capabilities to correct for various distortions in the reflected light caused by the particles in the air as well as the ground cover below the vegetation. The EVI data product also does not become saturated as easily as the NDVI when viewing rainforests and other areas of the Earth with large amounts of chlorophyll (Earth Observatory, 2009). It is becoming evident that studies of the growing season of land vegetation have become an important scientific issue for research into global climate change. The objectives of this research are to obtain the spatial distribution of rice fields in Karawang, Subang, and Indramayu Regency as national rice barn and to calculate estimation of rice production using medium resolution MODIS satellite imagery. The main data used for this research is MODIS EVI imagery with the resolution of 250m by 250m with the acquisition date ranging from 1 January 2008 to 31 December 2010. The landuse map and rice production statistic were acquired from Badan Informasi Geospasial (BIG/formerly known as BAKOSURTANAL) and Badan Pusat Statistik (BPS) that will be used to validate the spatial distribution and production estimation of rice field in the research area. The first technique to do is to change the 16-day of EVI MODIS image projection from sinusoidal projection into geographic projection, and the results were used to do next process. All of the 69 EVI MODIS satellite data ranging from January 2008 to December 2010 then were stacked to create an image with 69 bands that will make it able to be analyzed as multi temporal image of 16 days interval of EVI data. Next of the process is to subset to 69 bands EVI image with administrative boundary of Karawang, Subang, and Indramayu Regency and resulting EVI image of research area.
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