把gerber文件用图形表示出 很简单的做了一下

Gerbv是一个开源Gerber文件（仅RS-274X）查看器。 Gerbv允许您彼此加载多个文件，在显示的图像上进行测量等。除了查看Gerbers外，您还可以查看Excellon钻取文件以及放置文件

The current Gerber formats are RS-274X or Extended Gerber, either X1 or X2. Standard Gerber or RS-274-D is obsolete and revoked. It was superseded by RS-274X decades ago. Do not use Standard Gerber any longer. Some applications stubbornly continue to use painting (aka stroking) to create pads and copper pours. While not formally invalid painted files require more manual work and increase the risk of errors in fabrication. Painting is a relic of the days of vector photoplotters, devices as obsolete as the electrical typewriter. We urge all users and developers to banish painting from our industry.

RS-274X格式Gerber命令详解 英文版

The Gerber Format Specification RS-274X or Extended Gerber