OnTheMap v4 data available - now without login requirements

The OnTheMap v4 data are now available for download. Furthermore, after nearly three years of tracking usage, we have lifted the registration requirement. In that time, nearly 400 users registered for download, and many have downloaded each new release as it came out. Funding for the download site was provided through NSF Grants #0427889, #0339191 and continues to be made possible through NSF Grant #0922005.