1 ESTIMATION OF GREEN LAND TO URBAN CHANGE BASED ON CELLULAR AUTOMATA (CA) METHOD IN SINGARAJA CITY AND ITS SURROUNDING AREAS Nyoman Arto Suprapto 1) ; Takahiro Osawa 2) ; I Dewa Nyoman Nurweda Putra 3) 1) Master Program of Environmental Sciences, Udayana University 2) Center of Remote Sensing, Udayana University 3) Faculty of Marine and Fisheries, Udayana University E-mail: artopraph@gmail.com ABSTARCT Singaraja city is the second largest city in Bali which have a fairly rapid growth. Growth and development of the region in urban areas of Singaraja give the positive impact on the economy of the community but also give the negative impact on the environment. Land use change and land conversion into one of the negative issues of the development of urban areas in Singaraja. This study intends to calculate the amount of land conversion occur on the green land into urban areas within 14 years (2001-2015) and predict land use change in 2020 and 2025 in Singaraja City and Its Sorrounding Areas. Landsat 7 and Landsat 8 imageries were used to determine the land use map. Land use map obtained through the process of image classification using supervised method then verified using data field. Land use maps in 2015 and 2001 used to obtain the amount of change of urban areas and green land during the period of 14 years. This results show increasing amount of urban areas as 11,37% (3.153,74 ha) whereas green land decreased by 11,17% (3.097,68 ha). Land use change was predicted by Markov method. The projection results show the amount of urban areas in 2020 was 27,40% (7.598,45 ha) and 35,97% (9.974,55 ha) in 2025. The results obtained with this prediction accuracy rate of 0.91. Keyword: Land Change; Green Land; Urban Land; and Cellualr Automata (CA) 1. INTRODUCTION Singaraja city is the second largest city in Bali which have a fairly rapid growth. Growth and development of the region in urban areas of Singaraja give the positive impact on the economy of the community but also give the negative impact on the environment. Land use change and land conversion into one of the negative issues of the development of urban areas in Singaraja. The porpuse of this reaearch are 1). To know change of green land into urban land in Singaraja City and its surrounding areas occurred during the periode of 2001 – 2015, 2). To know the projection of land use change of green land into urban land in Singaraja City and its surrounding areas in 2020 and 2025, 3). To know the accuracy of Landsat image classification and land use projection. This study intends to calculate the amount of land conversion occur on the green land into urban areas within 14 years (2001-2015) and predict urban change in 2020 and 2025 in Singaraja City and Its Sorrounding Areas.