<jupyter_start><jupyter_text>经度划分为1800个密位，维度划分为900个密位，转换公式：经度 lon = int(5*lon) + 900纬度 lat = int(5*lat) + 450<jupyter_code># # 存取图，避免重复读取大数据
np.save("nancatch400fig.np",fig)
# b = np.load("fig.np")
# 作图，先作一个维度看看
# plt.imshow(fig[0], cmap ='gray')
# plt.imsave('nancatch20.png', fig[0])
# plt.imsave('nancatch20gray.png', fig[0], cmap='gray')
for i in range(8):
    plt.imsave('nancatch400gray'+str(i)+'.png', fig[i], cmap='gray')<jupyter_output><empty_output>
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