基于空间景观格局的区域耕地坡度分级量算工艺流程及应用——以大连市甘井子区为例

Cultivated Land Slope Graduation Technical Process of Region and Application——A Case of Ganjingzi District in Dalian City

分析了大连市甘井子区1∶1万土地利用数据库中耕地图斑的空间景观格局,探讨大连市甘井子区耕地图斑坡度级与DEM尺度的关系,提出GIS结合DEM的区域耕地图斑坡度级量算的工艺流程,并通过GIS程序设计实现区域耕地坡度级的自动提取。通过耕地图斑的坡度级有效测算田坎系数和耕地图斑的净面积,为大连市甘井子区第二次土地耕地数据库提供科学依据,也为大连市甘井子区耕地保护、耕地潜力分析和生态环境保护提供空间决策支持。

This paper analyzed the spatial landscape pattern of the cultivated land patch of the Ganjingzi district of Dalian 1 ： 10000 land - use database, discussed the relationship between regional landuse cultivated land slope graduation and DEM - scale, presented the cultivated land slope graduation technical process of region through GIS and DEM, realized the cultivated land slope - class automatic extraction through GIS program, cal- culated the field ridge coefficient and the cultivated land net area through the cultivated land slope graduation, as well as the cultivated land net area provided a scientific basis for the cultivated land database, and provided the protection and the potentiality analysis of the cultivated land and the ecological and environmental protection of the cultivated land decision - making support.