Learn how to create this graph from this tutorial.
This graph is a 3D Bar plot with a label on top of each bar. A flat 3D surface plot is used to construct the conterminous 48 states of the US.
Overlaid on the 3D surface are 3D bars whose magnitude represents the populations of various US cities. The bars are placed on the US map using latitude (X) and longitude (Y), and the city labels are supplied by a separate column of data.