Adds support for users to upload their own SVG icons for styling geo_points or clusters in Elastic Maps.
Because Elastic Maps uses WebGL, dynamic styling requires rendering SVG icons as monochromatic PNGs using a Signed Distance Function algorithm. As a result, highly detailed designs and any color definitions in SVGs uploaded to Maps are not retained. Monochromatic SVG icons work best.
Custom icons are appended to the map saved object and are not accessible in other maps. Using the custom icon in another map requires creating a copy of the existing map or uploading the icon to the new map. Custom icons can be added, edited, or deleted in Map Settings. Custom icons can also be added from within the Icon select menu.
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