Keywords: 
• 生态位 /
• 空间格局 /
• 地理信息 /
• 芦山

Abstract: Based on the digital elevation model (DEM ) and remote sensing image date ,the settlement niche has been taken as a basic unit in this book .By the spatial analysis technology of Geographic information systems (GIS) ,the spatial information of the human settlements in Lushan County has been extracted . The habitat characteristics of the settlement niches in Lushan earthquake_stricken area and its relationship with the mountain environment have been clarified .The results show that 1) the settlement niches ,with an obvious clustering feature ,mainly distribute in the eastern ,southern ,and southeastern regions of Lus_han County ,the distribution is closely related to the subtropical climate ;2 ) the vertical differentiation characteristics about the settlement niches are significant :the total areas of the settlement niches on the region of gentle slopes (the slope angles between 6°~15°) reach the top ;the distribution areas of the set_tlement niches reduce significantly with slope increasing ,which is related to the appropriateness of farming conditions ;3) the settlement niches are mainly distributed in sunny_slopes ,w hich is suitable for human beings to habitat and for the crops to grow ;4) the settlement niches are distributed along with the rivers as a whole ,and its coverage becomes regularly smaller and smaller when the distance between the rivers becomes larger and larger .The result is closely related to the inhabitant commutation .