The Dynamic Monitor And Analysis Of Urban Sprawl And Hot Land Effect

With the fast development of the remote sensing technology, recently the information technique which takes "3S" as representation has rapidly developed. Because of the advantages that the satellite remote sensing may gain surface information fast and all_weather, it is vitally significant to optimize the city ecological environment and instruct the urban planning by researching on aspects that dynamic monitoring hot field of force distribution by using the remote sensing technology fast and effectively, obtaining the city expansion information, dynamic monitoring the city impervious surface.This paper used Harbin's ETM＋/TM images in 2001 and 1989, Firstly, preprocessing the remote sensing images, it can extract the research area scope from the wide range remote sensing image. Then on the base of gaining research area scope, it can establish the Radiant Temperature Spatial model by taking advantages of characteristic that the remote sensing image has hot information content, as well as taking advantages of the surface temperature inversion principle. Finally it obtains Harbin's hot field of force distributed situation in 2001 and 1989 separately. From this index, it also analysis the hot field of force. Similarly it also establishes the normalized NDVI Spatial model through the normalized vegetation index (NDVI) principle, and carries on the linear correlation analysis with the fitting method to the hot field of force temperature and the normalized vegetation index.Through the principle of Normalization Building Index(NDBI) and uniting with the false colored synthesis remote sensing image, visual interpretation, it extracts Harbin's city boundary in 2001 and 1989 separately, and obtained separately in 2001 with 1989 the cities area, the cities has used the proportion, as well as in 1989 expands the index with 2001 cities.On the base of obtaining Harbin's citu boundary, abstracts the impervious surface in the urban district boundary. Then it carries on the MNF transformation to the remote sensing image after atmospheric correction, definites terminal unit by unioning PPI, withdraws the impervious surface index from the remote sensing image in use of spectrum mix analysis principle. And in order to study the relevance between impervious surface index and the city hot field of force, separately has made the relevant analysis to impervious surface index and the hot field of force in 2001 and 1989. And through setting the hypothesis of the impervious surface index distribution map, separately extracts city impervious surface thematic map in 2001 and 1989.