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http://dx.doi.org/10.11108/kagis.2010.13.4.111

The Study of Land Surface Change Detection Using Long-Term SPOT/VEGETATION  

Yeom, Jong-Min (Satellite Information Research Institute, Korea Aerospace Research Institute)
Han, Kyung-Soo (Dept. of Geoinformatic Engineering, Pukyong National University)
Kim, In-Hwan (Dept. of Geoinformatic Engineering, Pukyong National University)
Publication Information
Journal of the Korean Association of Geographic Information Studies / v.13, no.4, 2010 , pp. 111-124 More about this Journal
Abstract
To monitor the environment of land surface change is considered as an important research field since those parameters are related with land use, climate change, meteorological study, agriculture modulation, surface energy balance, and surface environment system. For the change detection, many different methods have been presented for distributing more detailed information with various tools from ground based measurement to satellite multi-spectral sensor. Recently, using high resolution satellite data is considered the most efficient way to monitor extensive land environmental system especially for higher spatial and temporal resolution. In this study, we use two different spatial resolution satellites; the one is SPOT/VEGETATION with 1 km spatial resolution to detect coarse resolution of the area change and determine objective threshold. The other is Landsat satellite having high resolution to figure out detailed land environmental change. According to their spatial resolution, they show different observation characteristics such as repeat cycle, and the global coverage. By correlating two kinds of satellites, we can detect land surface change from mid resolution to high resolution. The K-mean clustering algorithm is applied to detect changed area with two different temporal images. When using solar spectral band, there are complicate surface reflectance scattering characteristics which make surface change detection difficult. That effect would be leading serious problems when interpreting surface characteristics. For example, in spite of constant their own surface reflectance value, it could be changed according to solar, and sensor relative observation location. To reduce those affects, in this study, long-term Normalized Difference Vegetation Index (NDVI) with solar spectral channels performed for atmospheric and bi-directional correction from SPOT/VEGETATION data are utilized to offer objective threshold value for detecting land surface change, since that NDVI has less sensitivity for solar geometry than solar channel. The surface change detection based on long-term NDVI shows improved results than when only using Landsat.
Keywords
Change Detection; NDVI; K-Mean Cluster; Landsat;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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