I am looking to produce several heat maps to display wildlife species survey density, however I am looking to seek further clarification and explanation on how the Radius value is defined for Heat Map Symbology. I have reviewed the ESRI webpage for this, Heat map symbology—ArcGIS Pro | ArcGIS Desktop and read that it says 'set the Radius to control the area searched when calculating the density of features. The radius is measured in points.' Can someone further explain what is meant by the radius being measured in points? Is it a set distance or does it just search the closest set number of points. For example, if the radius is set to 10, does it analyze the 10 surrounding points to each point to determine how dense it is?