In Kibana we have a visualization called Tile map which has has several options to customize, such as map type.
My question is about one of this types: Shaded Circle Markers which is basically about changing colors based on value.
Documentation says:
Displays the markers with different shades based on the metric aggregation’s value.
and that's correct, but I don't understand why some bubbles are bigger than others.
I assume that this may be due to the distortion caused by Mercator projection, which which is well presented by Tissot's indicatrix, but I didn't find any source which confirming my hypothesis.
Could you confirm my suspicion or explain in other way this behavior?
I've got an answer from Elastic Team Member who confirmed my suspiction. This distortion is caused by Mercator projection.
Link to Elastic Search forum: https://discuss.elastic.co/t/size-of-the-circles-in-kibana-tile-map-visualization/108395