城市绿化遥感中建筑物遮蔽面积校正模型研究

城市高楼林立,建筑物阴影及投影误差会对城市绿地产生遮蔽,从而影响城市绿化遥感调查的结果。城市绿化遥感建筑物遮蔽校正是根据研究区内建筑物的位置、高度以及遥感图像的成像参数计算区域内建筑物遮蔽面积,并估算遮蔽面积中绿地比例,在此基础上,对原有的城市绿化遥感调查的面积进行校正。在分析城市绿化遥感中常用遥感数据成像特点的基础上,推导出投影误差造成的遮蔽面积公式,建立遥感遮蔽校正模型。并以上海市长桥五村为研究区域进行绿地面积、绿化覆盖率遥感校正,结果表明校正后的绿化覆盖率精度提高4%～5%。

A Shadow Area Correction Model for Remote Sensing of Urban Green Space

Densely high-rising buildings in urban areas often belie the result of remote sensing survey regarding urban green space due to defilade of their shadows.This paper relates to a correction model based on the computation according to position and height of each building as well as imaging parameters of sensors,which has been applied to an area in Shanghai for rectifying the green cover rate and green belt areas in a remote sensing research.