We have a reference layer in ArcGis online with polygons. In a seperate file we have a registration of plants and animals found in these polygons.
We like to show the polygons where the plants are found and we like to color the polygons with a gradient color according to the amount of plants and animals found within the bounderies of the polygon.
Filtering of the polygons wich do have the selected plants is already possible, now we like to gradiently color the reference layer.