Something is wrong with the NHGIS data I downloaded. What should I do?
There are lots of reasons why something may seem wrong with your data. Typically the issue stems from trying to use the incorrect data format for your software or the odd quirks that exist in older census data. Review the information on the User’s Guide and Data Documentation pages for additional information. Of course, always feel free to contact NHGIS User Support at nhgis@umn.edu with any questions you may have.