[1]SONG Jinrui,GAI Aihong,REN Xiujin.Study on Construction Land Extension of Delhi City Based on GIS and RS[J].Research of Soil and Water Conservation,2015,22(05):176-180.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
22
Number of periods:
2015 05
Page number:
176-180
Column:
Public date:
2015-10-28
- Title:
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Study on Construction Land Extension of Delhi City Based on GIS and RS
- Author(s):
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SONG Jinrui, GAI Aihong, REN Xiujin
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College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou 730070, China
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- Keywords:
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RS; GIS; visual interpretation of human-computer interaction; space expansion; Delhi City
- CLC:
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F293.2
- DOI:
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- Abstract:
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With the help of RS and GIS, the remote sensing image of 1989 TM, 1999 ETM and the land-use pattern of 2009 in Delhi City were analyzed and treated, the information about scope of built-up of this city was extracted by the method of visual interpretation of human-computer interaction, and the maps of the built-up area of the three periods were overlaid. Then, the status of spatial expansion of built-up area in Delhi City was analyzed based on the intensity of urban expansion, transfer of the center of gravity, compact index, fractal dimension index and urban expansion coefficient of elasticity. The results showed that both the area of Delhi built-up area in the two stages were increasing, however, the rate and intensity of expansion of the built-up area was greater from 1999 to 2009 than that from 1989 to 1999. The center of gravity of the built-up area offset to the northwest, the compact index was too little, and gradually reduced, the fractal dimension index was much lager than the reasonable value of 1.12, the morphology of urban spatial evolution became more complex. The urban expansion coefficient of elasticity was too large, and there was an upward trend, the increase of urban population and the expansion of urban area were inconsistent. As for the development of Delhi City in the future, it will be needed to focus on internal urban construction land planning, the reasonable control of the extension and expansion of the scale, it will also be needed to ensure the compact development of the urban pattern.