基于HJ-1卫星数据的曹妃甸龙岛面积计算

Area Calculation of Caofeidian Long Island Based on HJ-1 Data

通过选取符合要求的多时相HJ-1环境卫星资料,采用监督分类、逐步剔除相结合的遥感方法,利用ENVI等处理软件实现了曹妃甸龙岛潮汐条件下的陆地面积计算。龙岛在大潮涨潮之际,陆地面积不足3 km2;而小潮时,面积则至少达7.6 km2。与地面测绘结果对比表明,利用HJ-1卫星能够较好地满足龙岛等地开发建设对潮汐条件下的面积计算要求。

By choosing proper multi-temporal HJ-1 environment satellite data, and using remote sensing methods combining supervised classification, gradual elimination, the area of Caofeidian Long Island under the condition of tides was achieved based on the ENVI software. The results show that the land area is less than 3 square kilometers in the spring tidal condition. However, when the neap tides appear, the land area is 7.6 square kilometer at least, which increased by more than two-fold. The comparison with the ground mapping results show that using the HJ-1 satellite data can meet the developments and constructions requirements of Long island area calculations under the tidal conditions.