This data layer is the 1991 statewide spring orthophotography. It originated from the United State Geological Survey, has a 1 meter resolution, and is in black and white. Orthophotography is extremely useful for determining land use and land cover. As a result of this, it can provide important context for specific locations and other spatial data. If multiple years are available, it can also be used to identify changes that take place on the landscape.