The Jyotish Star Map
In Hinduism, the lokas span even further out beyond these three levels all the way up to the greatest heavens, where the mightiest saints and sages and the purest gods and goddesses live. Jyotish, however, also addresses other realms: ones that go all the way down to the darkest and most infernal hells. In total, seven lokas are referenced (from our world of ordinary experience up through the highest heavens) and a supplemental scheme is applied to classify the hell regions (all strata below the earth plane).
While Vedic astrology has charts and tools to understand all these levels of experience, the most important charts it works with are the natal chart and navamsha chart. With just these two and a few extra trinkets, you have a brilliant model for your life—what you should be doing, how you can tell if you are on track, what's going on right now, why things happened the way they did, what opportunities you have access to ... and, most importantly, clear guidelines on how you should live your life, regardless of the path you choose to follow (wealth, happiness, virtue, spirituality).
Here's a look at some of the details involved. You can click on each slide to get a larger, clearer view: