| 摘要: |
| 【目的】基于GIS技术，快速、准确地实现渭北黄土高原小流域范围内立地类型的划分。【方法】以地处黄土高原南缘残垣沟壑区复杂地形的永寿县永平乡为试验区，采用相对位置指数法提取地形部位信息，利用数字高程模型（DEM），对研究区地形部位在空间上的相对位置进行了定量化，结合坡向和坡度因子进行立地类型划分，最后利用现地立地因子信息样点对分类结果进行验证。【结果】利用上述方法将地处黄土高原南缘残垣沟壑区复杂地形的永寿县永平乡划分成19种立地类型，并对其面积进行了统计；经与实地立地类型划分结果进行比对，显示本研究方法的划分结果精度达92%。【结论】借助GIS技术不仅能快速地在小流域内实现该区域立地类型划分，而且精度高，能够为当地林业生产信息化提供技术支撑。 |
| 关键词: GIS 黄土高原 相对位置指数 立地分类 永寿县 |
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| 基金项目:“十二五”国家科技支撑计划重点项目(2012BAD22B0302)；国家级森林培育学教学团队建设项目 |
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| GIS based landsite classification in Weibei Loess Plateau: A case study in Yongping Town,Yongshou County |
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| Abstract: |
| 【Objective】The goal of this study was to quickly and accurately achieve landsite classification at small basins in the Loess Plateau area based on the geographical information system(GIS).【Method】Landform was abstracted and quantified from digital elevation model (DEM) by the relative position index (RPI) method in the study area.The landsite was classified using the quantified landform,slope and aspect factors.Furthermore,the classification results were verified using the true site information collected from the study area.【Result】The study area was divided into 19 landsite types and each site type area was calculated.Compared with the indeed landsite type,the accuracy of landsite classification was 92%.【Conclusion】Using GIS,landsite of small basins can be quickly and accurately classified. |
| Key words: GIS Loess Plateau relative position index landsite classification Yongshou county |
