Landsat Image Analysis for Open Spaces Change Monitoring to Temperature Changes in Semarang City

摘要

Land use change in urban areas could not be avoided as consequence of land requirement incensement. The high density of developed land in the central city have pushed the development towards the periphery. This article examines the result of Landsat image analysis using remote sensing (RS) and geographic information system (GIS) technology to monitor green open spaces change to temperature changes in Semarang. Data source which used in this study are Landsat 5 Image in 2003, and Landsat 8 Image in 2015. This uses multispectral classification method with a supervised approach to get land use condition serially (time series). Surface temperature processed based on radiance value in band 6 of Landsat 5 and the value in band 10 and 11 of Landsat 8 TIRS. Temperature changes were seen quite significant in the west side of Semarang City, include Ngaliyan District, Mijen District and Gunungpati District. The change occurs in an average range of 20.75°C to 22.07°C. Along with the temperature changes, based on image analysis result showed that green open spaces in all of three districts were decreased from 48.75 km2 to 22.98km2. In general, the green open spaces change throughout Semarang City from 15.28% to 9.91% within a period of 12 years (2003-2015).