东北平原区地块尺度土地质量地球化学评价合理采样密度研究

彭敏, 李括, 刘飞, 唐世琪, 马宏宏, 杨柯, 杨峥, 郭飞, 成杭新

Reasonable sampling density for land parcel scale geochemical assessment on land quality in Northeast China Plain

Min PENG, Kuo LI, Fei LIU, Shi-Qi TANG, Hong-Hong MA, Ke YANG, Zheng YANG, Fei GUO, Hang-Xin CHENG

图3 空间插值相对误差(Er)计算方法示意图 a—1236点位数据地球化学图;b—640点位数据地球化学图;c—相对误差图;d—各误差范围内栅格面积比例

Fig.3 Calculate method for relative error(Er) of interpolation a—geochemical map interpolated using 1236 samples;b—geochemical map interpolated using 640 samples;c—relative error;d—percentages of grid area in each Er range