Scientist Pete Kelsey and his team have 3D-mapped the entire island of Alcatraz, discovering Civil War secrets, prisoner escape routes – and looking at ways to preserve the island for the future.

Forest Service maps, Bureau of Land Management maps, and highway maps to name a few. Some show general features and points of ...

Not all assignments are certain. "We are proud of how far we have come, but there is a long way to go," said Jenniskens. "Like the first cartographers who traced the outline of Australia, our map ...