This map shows the distribution of homes valued at over $1mm.
The symbols represent counties,
they are located at the geographic center point of each county
and proportional to the number of $1mm+ homes.
As you zoom to a smaller scale map, the frame of reference changes to zip codes, and then to block groups.
Each level uses smaller, more granular units, and the center point is a more precise indication of where the homes are found.
Follow the directions in the upper left corner, and you can obtain create a sub-total of $1mm+ homes for any custom area by pointing and clicking with the mouse.