中文摘要：

为提取连云港海岸线，确定海岸线的准确位置，选取2005年Landsat 5 TM遥感数据，利用harr小波变换方法对影像数据进行增强处理，然后用目视解译法确定水陆分界线的位置。由于研究区内水陆分界线位置随潮汐变化较小，其变化幅度在遥感影像上小于一个像元，因此，解译得到的海陆分界线可以作为海岸线。为检验方法的有效性，利用GPS对海岸线进行了实地观测。实测值与解译值对比表明，解译精度平均偏差在纬度方向上为8．33m，经度方向上为4．32m，小波变换对图像的增强作用明显。

英文摘要：

In order to abstract Lianyungang coastal line and determine its location accurately, we chose Landsat 5 TM remote sensing data of 2005, and got the location of the boundary between sea and land by enhancing the processing of harr wavelet transformation and by visual interpretation. Since the variation of the boundary location induced by tides is slight and less than a pixel of TM image, the interpreted sea-land boundary can be taken for coastal line. In order to validate this method, we investigate 10 GPS observations along the Lianyungang coastal line. A comparison of GPS observations and interpretations shows that the average bias of latitude is 8.33 m, and that of longitude 4.32 m. It also shows that the wavelet transformation enhances the image significantly.