Based on eight remotely sensed images, this paper studies the spatial-temporal characteristic of Chongqing's city spatial
morphology evolution in recent three decades. The process and characteristics of urban expansion and urban morphology
are analyzed using fractal dimension, radiation index and compactness index based spatial morhoplogic measurement
coupled with land use change mornitoring. The results show that Chongqing developed by leaps and bounds and
experienced three major stages, i.e., relatively stable period in the 1980s, the slow development period after the mid-1980s and the relatively high-speed development period in recent years. The urban built-up area was 87.32km<sup>2</sup> in 1978
and increased to 282.91km<sup>2</sup> in 2005. The increase built-up area originagtes from different land use type, of which about
76.86% coverted from arable land and about 20.52% coverted from rural area and dependent factory, diggings land and
other construction area.
By interpreting remote sensing images of Nanchang city in seven phases from 1976 to 2004, we get the profiles of the
main build-up area of Nanchang city in these phases. And then the compact ratio, Boyce-Clark shape index and fractal
dimension of each profile were calculated. Based on these, the conclusion is drawn that the spatial expansion of the main
build-up area of Nanchang city was turning discrete before 2000 and then became more and more compact. Besides, the
Nanchang City didn't have the fractal character as a whole in the past three decades, but it showed up when it refers to
certain areas, and the scale range varied as the evolvement of the spatial expansion. On the other hand, the value of the
fractal dimension was further and further away from the standard value before 2000 and then became close to that, which
appeared the similar trend with the change of the city compactness. It's indicated that the city is more and more
The urban space expansion is an important indicator for measuring urbanization level. Based on one Landsat MSS image and three Landsat TM images, the urban built-up characteristic of Hong Kong and its impact on the peripheral land during1973-2004 was analyzed. The urban area was 59.95km<sup>2</sup> in 1973 and increased to 207.70km<sup>2</sup> in 2004, the built-up area increased by 147.75km<sup>2</sup> during the past 31 years and expanded 4.77km<sup>2</sup> per year. The built-up area expanded around the old area and didn't present manifest change in a certain direction. The expansion rate was distinct from each other and Beijing city experienced two fast expansion stages comparatively. The increased built-up area originates from different land use type, of which about 33.28% converted from sea, and 13.34% converted from rural area and dependent factory, diggings land and other construction area. The other mainly came from arable that accounts for 39.93% of the whole added built-up area. Many factors have contributed to the urban land use changes. But four major driving forces, population growth, economic increase, transportation infrastructure improvement and institution and policy change, are the most important factors. Population growth can simulate the built-up area manifestly, the economic increase is the main impetus of the land use, and the transportation infrastructure improvement is the impetus for the urban expansion, while the institution and policy change determine the macroscopical development and expansion pattern in some degree.
Land use/cover change (LUCC) is a key aspect of global environment change and in a sense indicates the influence of human activities on natural environment. Regional case study is the core of LUCC research. The 28th Olympic Games will be hold in Beijing. The Olympic Green locates in northern Beijing, where there are villages, residential houses, arable land and commercial building. In order to detect the changes of land use in the past several years and monitor the change of the Olympic Green and the construction implementation in the past four years, one Quickbird image of 2002 and three aerial true color images of 2003, 2004 and 2005 in May or July are used to monitor the change and the location of construction, green land, water body after standardized radiometric normalization correction and geometrical correction. The land use changes during the past four years were statistically analyzed by the interpretation of the images that show clearly the location of the housebreaking area and the progress of the Olympic main venue construction area.