摘要
通过利用 GPS及渔探器实测 ,并进行潮位订正 ,获得南通浅海海域大量测点的高程资料 ;通过对多时相各通道 NOAA卫星照片进行筛选 ,挑选能反映浅海地貌的通道资料 ,从中读取各测点相对应的灰度值 ,在此基础上利用分级线性回归 ,建立不同高程范围内的高程、灰度线性回归方程 ,确定不同高程的灰度阈值 ,从而测量出南通市浅海海域不同高程以上的潮间带面积、分布。
A lot of data of elevation in different places of the shallow water of Nantong were obtained by fish exploring machine and GPS determining and tide correcting.An image which reflects landforms of Nantong was obtained by selecting from the many NOAA images on different channels and in different phases.Based on the image,grey scales corresponding to different places were obtained.By using classifying liner regression technique,liner regression equations were established between the elevation and grey scale,and the threshold values of grey scales of the different elevations were determined.According to the threshold values,the areas of the tidal zone above different elevations of the shallow water of Nantong were estimated.
出处
《气象》
CSCD
北大核心
2001年第3期19-22,共4页
Meteorological Monthly
