Hisato OGATA

Extraction of Land Cover Changes in Nagaoka City
by a Simultaneous Analysis of 2 Temporal Data


The land cover changes in Nagaoka city was extracted using LANDSAT-TM data
observed in 1993 and 1999. In the past paper, the change areas were extracted, after
performing each land cover classification in 1993 and 1999. However, since it was
thought that it difficult to analyze 2 temporal data under a same condition, in this
research, the land cover changes was extracted using combinations of indexes and
their differences. In this analysis, thresholds of the indexes to extract the change
areas ware examined, and the technique of this research was evaluated by
comparing with the typical change areas extracted in this research and area data
provided by Nagaoka City Preparation Department, etc.