What is the determined method for calculating the pixel size of an SVG image?

Did you know that the Stackoverflow logo is actually an <a> element with a SVG image as its background?

#hlogo a {
    text-indent: -999em;
    display: block;
    width: 200px;
    height: 50px;
    background-image: url("img/sprites.png?v=c4222387135a");
    background-image: url("img/sprites.svg?v=1bc768be1b3c"),none;
    background-position: top left;
    background-repeat: no-repeat;
    position: relative;
    top: 5px;
}

If you check the SVG image using the developer tools in Chrome, it shows a size of 240 * 500 pixels.

However, the <a> element itself has dimensions of 200 * 50 pixels.

This poses the question: how is the size of the SVG image calculated to be 240 * 500 pixels?

Considering that SVG images are scalable and vector-based, the fixed pixel size seems puzzling.

Given the current context of the elements, this discrepancy remains a mystery.

Answer №1

The solution can be found.

It is clearly specified in the SVG definition.

width="240px" height="500px"

<?xml version="1.0" encoding="UTF-8"?><svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
     width="240px" height="500px" viewBox="0 0 240 500" enable-background="new 0 0 240 500" xml:space="preserve">
<g id="Layer_2_1_">
</g>
</svg>

Answer №2

The dimensions of 250 x 500 for this svg file were chosen to accommodate more than just the Stack Overflow logo. Take a look at the image below for better understanding.

https://i.sstatic.net/mfqDk.jpg

The layout resembles that of a sprite sheet, explaining the difference in height compared to the logo itself.

Establishing an initial size for the vector is crucial for maintaining proportions and providing context for the x and y coordinates.

Therefore, when this svg was first generated, it was intentionally set with specific dimensions of 250 x 500.

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