The United States Geological Survey (USGS) is currently testing procedures for volunteers to collect and update USGS geographic data. A prototype online editor has been developed to allow volunteers to contribute data to The National Map and The National Structures Dataset. All that is needed is access to the Internet and a willingness to dedicate some time editing map data.
For the past year, volunteers have been updating data in Colorado with great results. Volunteers can now contribute data for Alabama, Arizona, Arkansas, Alaska, California, Connecticut, Delaware, Florida, Georgia, Idaho, Illinois, Louisiana, Maryland, Massachusetts, Michigan, Mississippi, Montana, Nebraska, Nevada, New Hampshire, North Dakota, New Jersey, New Mexico, Ohio, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Utah, Vermont, Washington, West Virginia and Wyoming. You do not need to live in available states to participate. USGS editing guidelines explain how you can contribute data from anywhere.