Estimation of Time Series Change on Surficial Distribution of Green Tracts of Land:

Vicinity of Mito City, Ibaraki Prefecture

Abstract

The purpose of this study was to analyze changes in green tracts of land in the central urban district in the vicinity of Mito City using green space maps prepared from topographical maps and satellite image. Few investigations have been carried out to date on long-term changes in the surficial distribution of green tracts of land together with further investigations on the trend of variation. We analyzed changes in green tracts and the trend of variation using the 1:25000 topograpical maps published by the Geographical Survey Institute (1940, 1970, 1985 and 2000) and satellite images (EOS-Terra / ASTER:2000). As a result of this analysis, the following findings were obtained: (1)A decline in green space in the southwestern direction from the central district of the city was observed. (2)By improving the analysis procedure, the segmentation of the green land was clearly confirmed.