SVG viewBox & coordinate system
https://codepen.io/xgqfrms/pen/abOOrjp
<html>
<body>
<header>
<h1>user coordinate system / viewport coordinate system</h1>
<p>（SVG 宽高）比 viewBox 大，就等比放大；比 viewBox 小，就等比缩小；</p>
</header>
<h2>width="400" height="200 viewbox="0 0 200 100"</h2>
<p>2 : 1</p>
<section>
<svg width="400" height="200" viewbox="0 0 200 100">
<!-- SVG content drawn onto the SVG canvas -->
<rect fill="grey" x="0" y="0" width="200" height="100"/>
<text x="100" y="50" fill="red">200 100</text>
</svg>
</section>
<h2>width="400" height="200" viewbox="0 0 400 200"</h2>
<p>1 : 1</p>
<section>
<svg width="400" height="200" viewbox="0 0 400 200">
<!-- SVG content drawn onto the SVG canvas -->
<rect fill="grey" x="0" y="0" width="200" height="100"/>
<text x="100" y="50" fill="red">200 100</text>
</svg>
</section>
<h2>width="200" height="100" viewbox="0 0 400 200"</h2>
<p>1 : 2</p>
<section>
<svg width="200" height="100" viewbox="0 0 400 200">
<!-- SVG content drawn onto the SVG canvas -->
<rect fill="grey" x="0" y="0" width="200" height="100"/>
<text x="100" y="50" fill="red">200 100</text>
</svg>
</section>
</body>
</html>
svg-coordinate-systems
viewBox
https://www.sarasoueidan.com/blog/svg-coordinate-systems/
