Mapping fifty global cities' growth using time-series Landsat data

Hasi Bagan, Yoshiki Yamagata

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

Urban growth and sprawl have drastically altered the ecosystems and ecosystem services. The objectives of this study are to using grid square method to investigate the spatial and temporal dynamics of urban growth in 50 global cities using Landsat ETM/TM imagery from 1985 - 2011. First, MLC classification method were used to produce land cover maps by using Landsat images from 1985a's, 1993a's, and 2007a's (completed); then intersect the land cover maps with 1-km2 grid cell maps to represents the proportion of each land cover category within each 1-km2 grid cell (ongoing); finally, combining the proportional land cover maps to investigated the relationship between land cover changes based on grid square cells for three intervals (i.e. around 1985, around 1993, and around 2007). Change analysis unveiled large changes in land cover and land use have occurred from 1985a's to 2007as. The case in Tokyo, Japan shows the Settlements area has rapidly expanded to the surrounding sub urban area which was mainly located flat areas or along the transportation lines. The area of Settlements doubled over the past two decades, increasing from 12.5% of the study area in 1987 to 23.5% in 2011. The correlation analysis in Tokyo shows strong, negatively linear relationship between the Settlements change and cropland change (r = - 0.78), suggesting that the vast area of cropland area have been converted to Settlements during the last two decades. In the next step, we will analyze the other 49 cities using 1-km2 grid cell approach and calculate the correlation coefficient matrix between the changes of land cover categories from 1985a's - 2007a's for each cities. Furthermore, we expect to compare and contrast the rates and patterns of expansion, and drivers of land cover change in 50 cities..

本文言語English
ホスト出版物のタイトルLand Surface Remote Sensing
出版社SPIE
ISBN(印刷版)9780819492630
DOI
出版ステータスPublished - 2012
外部発表はい
イベントLand Surface Remote Sensing - Kyoto, Japan
継続期間: 2012 10 292012 11 2

出版物シリーズ

名前Proceedings of SPIE - The International Society for Optical Engineering
8524
ISSN(印刷版)0277-786X
ISSN(電子版)1996-756X

Conference

ConferenceLand Surface Remote Sensing
国/地域Japan
CityKyoto
Period12/10/2912/11/2

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • コンピュータ サイエンスの応用
  • 応用数学
  • 電子工学および電気工学

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