Try Vega
You can now try out the powerful MapD Vega engine. The database used for the examples includes over 100,000,000 rows. The data is based on the political donations dataset. Some columns have been stripped so that the data can fit on one NVIDIA Tesla P100 GPU.
The following examples are available:
Choropleth Visualizing 43000 Zipcodes
Multilayered Map (Point and Choropleth)