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目的探讨高分辨率中巴资源卫星02B星(CBERS-02B)遥感图像在探测湖沼地区钉螺孳生地中的初步应用。方法将CBERS-02B星HR图像与CCD图像融合形成高分辨率遥感图像,并分别应用高分辨率中巴资源卫星遥感图像和CCD图像提取江西省星子县地区的潜在钉螺孳生地。在研究区域内随机抽取2 000个验证点,应用McNemarχ2检验比较验证点在钉螺孳生地内外分布的差异。结果高分辨率中巴资源卫星遥感图像与CCD图像提取的星子县潜在钉螺孳生地面积分别为98.23 km2和94.89 km2,位于两者内的验证点数分别为255个和248个,差异无统计学意义(χ2=1 779.52,P=0.23)。结论在大尺度范围内,应用高分辨率中巴资源卫星遥感图像提取的钉螺孳生地与CCD图像提取钉螺孳生地范围和面积基本一致。
Objective To explore the preliminary application of high resolution CBERS-02B satellite imagery in detecting snail breeding areas in lakes and marshes. Methods HR images of CBERS-02B satellite were fused with CCD images to form high-resolution remote sensing images. High-resolution CBIR satellite remote sensing images and CCD images were used to extract potential snail breeding sites in Xingzi County, Jiangxi Province. In the study area, 2 000 verification points were randomly selected, and the McNemarχ2 test was used to compare the difference of the internal and external distributions of the verification points in the snail breeding area. Results The potential snail breeding areas in Xingzi County of China were 98.23 km2 and 94.89 km2, respectively. There were 255 and 248 validated sites in both of them. The difference was not statistically significant (χ2 = 1 779.52, P = 0.23). Conclusion On a large scale, the snail habitat extracted from the high resolution CABAS satellite remote sensing image is basically the same as the snail breeding area and area extracted from the CCD image.