STUDY OF LAND USE CHANGE FROM 1997 TO 2014 USING LANDSAT DATA IN BANGLI REGENCY

– Bangli Regency is a district the only region in the province of Bali district that does not have a beach with an area 52,081 hectares or 9.24% of the total area of Bali Province (563,666 ha). Growth and development in the region Bangli Regency give the positive impact on the economy of the community, but also give the negative impact on the environment. Land use change conversion into one of the negative issues of development Bangli Regency. This study intends to calculate the amount of land conversion that occurred area within 17 years (1997-2014) in Bangli Regency. Landsat 5 TM, Landsat 7 ETM + and Landsat 8 OLI / TIRS imageries were used to determine the land use map. Land use maps obtained through the process image classification using supervised methods then verified using field data. Supervised classification techniques are divided into nine classes, namely the fresh water, bare land, forest, settlements, shrubs, irrigate paddy field, un irrigate paddy field, dry land and plantations. The results show changes in land use from 1997 until 2003 that fresh water increased 3.60 (0.00%), residential increased (2,777.00 ha (5.32%)), and dry land increase (1,866.80 ha (35.84%)) while the bare land ( -99.00 ha (-0.19%)), forest (-223.90 ha ( - 4.29%)), shrubs (ha -629.10 (-1.21%)), irrigated paddy field (-679.50 ha (-1.30%)), Un irrigate paddy field (-515.70 ha ( -0.99%)) and

Abstract -Bangli Regency is a district the only region in the province of Bali district that does not have a beach with an area 52,081 hectares or 9.24% of the total area of Bali Province (563,666 ha).Growth and development in the region Bangli Regency give the positive impact on the economy of the community, but also give the negative impact on the environment.Land use change conversion into one of the negative issues of development Bangli Regency.This study intends to calculate the amount of land conversion that occurred area within 17 years (1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010)(2011)(2012)(2013)(2014) in Bangli Regency.

INTRODUCTION
Along with the development of ever increasing population, the need for land to be used as residential and agricultural land so plantations perceived increasing as well.This causes the land conversions, both from agricultural land into residential areas or of forests into plantations and agriculture.
Land use is the soil-forming factor is the determinant of the outcome of any intervention activities of the land surface of the earth man who is dynamic and serves to meet the needs of both material and spiritual life (Arsyad, 1989).
Bangli Regency is a regency on Bali that does not have a beach area and most of the area is a plateau, it affects the activity of the population and population density.This activity led to the forest population metamorphose into agricultural land, both legally and illegally.The impact of land use change from forest to non-forest and to non-agricultural already benefit both socially and economically (Tang, 2005).
Looking at the above conditions, the need for a strategic and solution for the management classification of land use synergies in accordance with the characteristics of the region.For this study was conducted to find the public perception in the preservation of land use in Bangli Regency using Landsat data.

Research Scope
This study is about the process of land use changes, includes fresh water, bare land, residential, bushes, irrigate paddy field, un irrigate paddy field, dry land and plantation during 1997-2014.

Land Cover Change detection
Landsat data in 1997, 2003 and 2014 were classified the land use by supervise classification with maximum likelihood method to particular nine catelogies, namely : fresh water, bare land, residential, bushes, irrigate paddy field, un irrigate paddy field, dry land and plantation.

Land Use Change detection
The classification results in rresearch location Bangli regency in 1997, 2003 and 2014 with nine categories including fresh water, bare land, residential, bushes, irrigate paddy field, un irrigate paddy field, dry land and plantation land are shown Figure 3.

Conclusion
The study of land use change classification map in Bangli Regency was created in 1997, 2003 and 2014 with nine categories.Accuracy of assessment in 2014, overall accuracy was 89.45%.Its result is a good.
From this study it can be concluded that the method of remote sensing can be used as a tool in the analysis of land use changes.The results of the analysis determines the change of land in 1997 -2014 region Bangli district namely the addition of land and reduction of land.Knowledge of the land change can be used to determine the quality of the environment.

Suggestion
1.For researchers, the use of Landsat image as a source of data in order to map the Land use areas with image interpretation technique can give sufficient information about the extent of the area, because the accuracy that obtained is good enough.
2-It is needed to carry out further research using a new image to compare the accuracy obtained and the changes land use areas and to compare the land use change and correlation analysis.
3. The time of intake of training area be carefully because it determine correctness of digital classification.

Figure
Figure 2. Concept Research

Table 1 .
Land Use classes, area and percent coverage change in Bangli Regency from 1997 -2014

Table 2 .
Land Use change , area and percent coverage change in Bangli Regency from 1997 -2014