景观格局指数,适宜粒度,尺度域,关中—天水经济区," /> 景观格局指数,适宜粒度,尺度域,关中—天水经济区,"/> landscape pattern index,suitable granularity,scale domain,the Guanzhong-Tianshui Economic Zone,"/> Granularity Effect in Analyzing Landscape Patterns  in the Guanzhong-Tianshui Economic Zone

›› 2013, Vol. 30 ›› Issue (5): 899-904.

Previous Articles     Next Articles

Granularity Effect in Analyzing Landscape Patterns  in the Guanzhong-Tianshui Economic Zone

 FENG  Xue-Ming1,2,2, LI  Jing1,2, ZHANG  Dong-Hai1,2   

  1. 1. College of Tourism and Environment Sciences, Shaanxi Normal University, Xi’an 710062, China;
    2. Center for Land Resources Research in Northwest China, Shaanxi Normal University, Xi’an 710062, China
  • Received:2012-08-02 Revised:2012-12-23 Online:2013-09-15 Published:2013-09-22

Abstract: Based on the data of TM images in 2010, The Guanzhong-Tianshui Economic Zone was divided into 6 landscape types using the ArcGIS software and Erdas software. The Fragstats 3.3 spatial analysis program was used to study the granularity effect of landscape pattern indices from the landscape types by selecting the area proportion of plots, number of patches, largest patch index, landscape shape index, mean fractal dimension of patches and connectivity index, and the fitting functions were analyzed. The results showed that there were 4 kinds of change trends of landscape pattern indices under a granularity range of 30-600 m:① The exponent value was basically unchanged;② The exponent value was regularly increased or decreased with an obvious inflection point;③ The exponent value was regularly increased or decreased without an obvious inflection point;④ The index changed irregularly; the response curves of landscape pattern indices to granularity could be fitted with cubic function and linear function separately. In the Guanzhong-Tianshui Economic Zone, the suitable granularity ranges for computing [JP2]and analyzing the landscape indices were 120 m for cultivated land, 120-160 m for forest, 90-130 m for grasslands, 90-110 m for waters, 90-130 m for construction land, and 110-160 m for unused land, respectively.

Key words: font-family: 宋体, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, landscape pattern index')">mso-bidi-language: AR-SA">landscape pattern index, suitable granularity, scale domain, the Guanzhong-Tianshui Economic Zone