Build your own index.

What matters most to you?

Pick up to 3.

Within each, which topics?

Pick 1 to 3 in each area.

How much does data quality matter to you?

Some measures are counted directly or placed point by point. Others are apportioned from coarser areas, and some are statistical models rather than measurements.

How current should the data be?

The current state, or how things are changing?