We have a problem with adding our own icons in SVG format so that ArcGIS Online sees the icon as stylable. We need both the circle and the icon symbol to be stylable from the icon. Unfortunately, we are unable to make the SVG so that Map Viewer recognizes the icon as multiple layers and therefore styles both the circle and the symbol. It always recognizes the icon as single-layer and the symbol changes based on the change of the circle, unless the symbol is black.
Here is an example of how we currently have the SVG set up so that the circle changes, but the symbol remains unchanged. This is a PNG of the symbol, which is encapsulated in the SVG.
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg width="256" height="256" viewBox="0 0 256 256" xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink">
<!-- Stylovatelný kruh -->
<circle cx="128" cy="128" r="128" style="fill:#3182bd;" fill="currentColor" />
<!-- PNG symbol -->
<image x="0" y="0" width="256" height="256"
xlink:href="data:image/png;base64,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" />
</svg>
Is there any way to make ArcGIS recognize the symbol as stylable?
When we convert it to a vector, ArcGIS Online still cannot recognize it as another layer.