There are two coordinate systems in SVG:
- The viewport coordinate system: viewport space
- and the content coordinate system: user space
Initially, the systems and their units correspond to each other:
<svg width="350" height="200">
…
</svg>
Currently, only the content coordinate system is visible (shown in red), because the systems are the same and one is hidden underneath the other.
If you add a viewbox or transform, the content and its coordinate system will begin to shift and scale:
<svg width="350" height="200" viewBox="0 0 237 300">
…
</svg>
Content coordinates are calculated starting from the top-left corner (at 0,0). Without the viewbox, this is the upper left corner of the viewport (turquoise point), but with the viewbox, this is the upper left edge of the viewbox (red point).
That is, now the location of the content will be measured relative to the new coordinate system and not from the viewport. Because of this, the figure will not appear to the left, but closer to the center, and the coordinate systems will no longer match.
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3.896.106.328.5.46.78.26.273.192.653.06.745-.26.735-2.66-1.6-5.728-3.766-7.16z" fill="#F1662A"/></svg></span><p class="course-loading-overlay__message"><b class="course-loading-overlay__message-title">Loading…</b><br><span class="course-loading-overlay__message-text">Everything will be ready in few seconds</span></p></div></div><div class="course-layout__sidebar course-theory"><div class="course-theory__inner course-theory__inner--left-stub"><button class="course-theory__close icon-close icon-close--light" type="button">Close</button><ul class="course-tabs course-tabs--non-interactive course-layout__theory-heading js--theory-tabs"><li class="course-tabs__item course-tabs__item--external course-tab course-tab--centered"><span class="course-tab__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#icon-theory"></use></svg></span><span class="course-tab__title">Theory</span></li><li class="course-tabs__item course-tabs__item--internal course-tab course-tab--centered course-tab--active js--theory-tab__theory"><span class="course-tab__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#icon-theory"></use></svg></span><span class="course-tab__title">Theory</span></li><li class="course-tabs__item course-tabs__item--internal course-tab course-tab--centered js--theory-tab__comments"><span class="course-tab__icon"><svg aria-hidden="true" style="width: 16px; height: 16px; fill: #2e2c9c;"><use xlink:href="/img/sprites/up.svg#comment"></use></svg></span><span class="course-tab__title">Comments</span></li></ul><section class="course-theory__content"><div class="js--theory-pane__theory course-theory__content-inner"><h1 class="course-theory__content-heading">Coordinate systems</h1><div class="course-theory__content-text"><p>There are two coordinate systems in SVG:</p><ol><li>The viewport coordinate system: <b>viewport space</b></li><li>and the content coordinate system: <b>user space</b></li></ol><p>Initially, the systems and their units correspond to each other:</p><pre><code><svg width="350" height="200">
…
</svg></code></pre><svg width="350" height="200" style="border: 2px solid teal; background-image: url('data:image/svg+xml,%3Csvg xmlns=\'http://www.w3.org/2000/svg\'%3E%3Cg fill=\'none\' stroke=\'teal\'%3E%3Cpath d=\'M-1,5 H600 M5,-1 V600\' stroke-width=\'10\' stroke-dasharray=\'1 49\'/%3E%3Cpath d=\'M-1,2 H600 M2,-1 V600\' stroke-width=\'5\' stroke-dasharray=\'1 9\'/%3E%3C/g%3E%3Ccircle r=\'5\' cx=\'0\' cy=\'0\' fill=\'teal\'/%3E%3C/svg%3E');"><g fill="none" fill-rule="evenodd"><rect width="100%" height="100%" stroke="gray" /><path fill="#EFE77F" fill-rule="nonzero" stroke="#D0011B" stroke-width="5" d="M80.3 87c-47.6 0-82 41.7-76.8 93.2 5.2 51.4 41.6 93 81.4 93 11 0 22-3.6 32-10 10 6.4 21 10 32.5 10 39.7 0 77-41.6 83.3-93 6.3-51.5-27-93.2-75-93.2-14 0-27.4 3.7-39 10.2C107 90.5 93.6 87 80 87z"
/><path stroke="#CCCC61" stroke-width="2" d="M101 137.7c-22.2 0-38.2 19.4-35.8 43.4 2.4 24 19.4 44 38 44 5.4 0 10.5-1.5 15-4.5 4.7 3 9.8 4.7 15.3 4.7 18.5 0 36-19.4 38.8-43.3 3-24-12.7-43.4-35-43.4-6.5 0-12.7 1.7-18.2 4.8-5-3-11-4.6-18-4.6z"
/><path fill="#6D2323" fill-rule="nonzero" d="M119.8 97.3L78.6 21.8l18.7-8.2" /><path fill="#000" fill-rule="nonzero" d="M116.4 265.8l-6.3 28.6-7-2.5 14-27zm3.4 1l7 28.6 7-6-14-22.6zm-2-3.6l-4 35.6 10.4.3-6.4-35z"
/><path fill="#7ED321" fill-rule="nonzero" d="M118.4 94.7s36-6 57.7-32C198 36.7 198 0 198 0s-36 6-58 32-21.6 62.5-21.6 62.5z"
/><path fill="#322A09" fill-rule="nonzero" d="M93.2 200c5.6 2.4 11.8 0 16.3-11.2 4.5-11 0-29 0-29s-15.6 9.7-20 21c-4.6 11-1.8 17 3.7 19.3zm53 0c-5.6 2.4-11.8 0-16.3-11.2-5-11 0-29 0-29s15 9.7 20 21c4 11 1 17-4 19.3z"
/><path stroke="#B8E986" d="M119.8 95c50.4-67 43.5-37.2 76-94.5" stroke-linecap="square" /></g><g fill="none" stroke="tomato"><path d="M-1,5 H600 M5,-1 V600" stroke-width="10" stroke-dasharray="1 49" /><path d="M-1,2 H600 M2,-1 V600" stroke-width="5" stroke-dasharray="1 9" /><rect width="100%" height="100%" stroke-width="2" /></g><circle r="5" cx="0" cy="0" fill="tomato" /></svg><p>Currently, only the content coordinate system is visible (shown in red), because the systems are the same and one is hidden underneath the other.</p><p>If you add a viewbox or transform, the content and its coordinate system will begin to shift and scale:</p><pre><code><svg width="350" height="200" viewBox="0 0 237 300">
…
</svg></code></pre><svg width="350" height="200" viewBox="0 0 237 300" style="border: 2px solid teal; background-image: url('data:image/svg+xml,%3Csvg xmlns=\'http://www.w3.org/2000/svg\'%3E%3Cg fill=\'none\' stroke=\'teal\'%3E%3Cpath d=\'M-1,5 H600 M5,-1 V600\' stroke-width=\'10\' stroke-dasharray=\'1 49\'/%3E%3Cpath d=\'M-1,2 H600 M2,-1 V600\' stroke-width=\'5\' stroke-dasharray=\'1 9\'/%3E%3C/g%3E%3Ccircle r=\'5\' cx=\'0\' cy=\'0\' fill=\'teal\'/%3E%3C/svg%3E');"><g fill="none" fill-rule="evenodd"><rect width="100%" height="100%" stroke="gray" /><path fill="#EFE77F" fill-rule="nonzero" stroke="#D0011B" stroke-width="5" d="M80.3 87c-47.6 0-82 41.7-76.8 93.2 5.2 51.4 41.6 93 81.4 93 11 0 22-3.6 32-10 10 6.4 21 10 32.5 10 39.7 0 77-41.6 83.3-93 6.3-51.5-27-93.2-75-93.2-14 0-27.4 3.7-39 10.2C107 90.5 93.6 87 80 87z"
/><path stroke="#CCCC61" stroke-width="2" d="M101 137.7c-22.2 0-38.2 19.4-35.8 43.4 2.4 24 19.4 44 38 44 5.4 0 10.5-1.5 15-4.5 4.7 3 9.8 4.7 15.3 4.7 18.5 0 36-19.4 38.8-43.3 3-24-12.7-43.4-35-43.4-6.5 0-12.7 1.7-18.2 4.8-5-3-11-4.6-18-4.6z"
/><path fill="#6D2323" fill-rule="nonzero" d="M119.8 97.3L78.6 21.8l18.7-8.2" /><path fill="#000" fill-rule="nonzero" d="M116.4 265.8l-6.3 28.6-7-2.5 14-27zm3.4 1l7 28.6 7-6-14-22.6zm-2-3.6l-4 35.6 10.4.3-6.4-35z"
/><path fill="#7ED321" fill-rule="nonzero" d="M118.4 94.7s36-6 57.7-32C198 36.7 198 0 198 0s-36 6-58 32-21.6 62.5-21.6 62.5z"
/><path fill="#322A09" fill-rule="nonzero" d="M93.2 200c5.6 2.4 11.8 0 16.3-11.2 4.5-11 0-29 0-29s-15.6 9.7-20 21c-4.6 11-1.8 17 3.7 19.3zm53 0c-5.6 2.4-11.8 0-16.3-11.2-5-11 0-29 0-29s15 9.7 20 21c4 11 1 17-4 19.3z"
/><path stroke="#B8E986" d="M119.8 95c50.4-67 43.5-37.2 76-94.5" stroke-linecap="square" /></g><g fill="none" stroke="tomato"><path d="M-1,5 H600 M5,-1 V600" stroke-width="10" stroke-dasharray="1 49" /><path d="M-1,2 H600 M2,-1 V600" stroke-width="5" stroke-dasharray="1 9" /><rect width="100%" height="100%" stroke-width="2" /></g><circle r="5" cx="0" cy="0" fill="tomato" /></svg><p>Content coordinates are calculated starting from the top-left corner (at 0,0). Without the viewbox, this is the upper left corner of the viewport (turquoise point), but with the viewbox, this is the upper left edge of the viewbox (red point).</p><p>That is, now the location of the content will be measured relative to the new coordinate system and not from the viewport. Because of this, the figure will not appear to the left, but closer to the center, and the coordinate systems will no longer match.</p></div></div><div class="js--theory-pane__comments hidden course-theory__content-inner"><div class="course-theory__content-text"><h2 class="course-theory__content-heading">Comments</h2><div id="disqus_thread"></div><script>
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