An incredible way to look at the distribution of people over the earth. It's scary and awesome at the same time. And it's bizarre that New Jersey got mentioned! We have a densely populated state, but where I live, in central/south New Jersey, it is full of open space. We have land between villages and towns. Hmm. Hard to grasp.
Here's a writing worksheet to help you think about your story world's technologies. Technology is an important part of worldbuilding – it can help you develop people, culture, history, geography… almost anything.