FAQ & Resources

1. Where can I find detailed information on how the base geographic crosswalks were created?

   • See here.

2. Where can I download the base geographic crosswalks?

   • See here.

3. Is there a pseudo-algorithm for the crosswalk generated in nhgisxwalk?

   • Yes. See the General Crosswalk Construction Framework here.

4. How can I cite the base geographic crosswalks?

   • See here.

5. Can I use NHGIS crosswalks for block group level data?

   • Yes, this functionality is currently available within nhgisxwalk.
   • For the original idea see here.

6. Can I use NHGIS crosswalks for tract level data?

   • Yes, this functionality is currently available within nhgisxwalk.

7. Can I use NHGIS crosswalks for county level data?

   • Yes, this functionality is currently available within nhgisxwalk.

8. What are "block group parts" and how can I download them?

   • What are "block group parts?"
   • How can I download them "block group parts?"

9. Still have a question?

   • Ask here in the IPUMS/NHGIS User Forum.