The next section of code will read the Echo Tops image and record the appropriate setting of altitude based on the color of each pixel in the image.

代码的下一部分将读取 Echo Tops 图像并根据图像中每个像素的颜色记录相应高度设置。

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It is recommended to have alternate text on these buttons, instead of have the screen reader read the URL. Here is an image button (Go button), followed by sample code to create it.

建议在这些按钮上使用替代文本，而不是让屏幕阅读器读取url。

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