Granular details can be displayed with the help of symbol maps. Proportional values can also be represented using these maps which will help show quantitative values for individual ids. So if we want to show sales data for last 5 years across the country, the same can be shown in the geo-view with proportionate size / magnitude related to each and every location accordingly. Filled up at the other hand is more suitable for showing “ratio” data. Pie charts typically have that information to a relative whole. For example, we want to display percentage of sales for a product by geographic location. In that case, filled maps can be used to show percentage of sales for different categories individually and relative to total sales by country. From Symbol Maps standpoint: Both data and map should be appealing enough and clear for user to interpret answers out of it Proportion of varying magnitude in data can be shown For example: we can plot earthquakes around the world and size them by magnitude. From Fill Maps standpoint: Here also both data and map should be appealing and clear enough Relevant for showing “ratio” data For example: when we want to show “cancer rate” around states, counties across a country for a particular time frame or within a time window, then fill maps or filled maps can be useful.