# Crosswalk between puma and sea

**URL:** <https://forum.ipums.org/t/crosswalk-between-puma-and-sea/1106>\
**Category:** USA\
**Created:** [November 4, 2015, 7:58pm UTC](https://forum.ipums.org/t/crosswalk-between-puma-and-sea/1106 "2015-11-04T19:58:00Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![yjinsong](https://avatars.discourse-cdn.com/v4/letter/y/bbce88/32.png) [@yjinsong](https://forum.ipums.org/u/yjinsong)\
**Post date:** [November 4, 2015, 7:58pm UTC](https://forum.ipums.org/t/crosswalk-between-puma-and-sea/1106/1 "2015-11-04T19:58:00Z")

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Hi,

Is there any crosswalk file between CONSPUMA and SEA?

I understand that CONSPUMA is consistent for 1970-onwards, and SEA is pre-1950.

Should I use counties-SEA crosswalk file and counties-countygroup and connect to PUMA or is there a more straightforward way?

Thank you in advance!

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**Author:** ![Tim\_Moreland](https://avatars.discourse-cdn.com/v4/letter/t/f1d935/32.png) [@Tim\_Moreland](https://forum.ipums.org/u/Tim_Moreland)\
**Post date:** [November 10, 2015, 8:29pm UTC](https://forum.ipums.org/t/crosswalk-between-puma-and-sea/1106/2 "2015-11-10T20:29:00Z")

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Unfortunately, I am unaware of a crosswalk between [CONSPUMA](https://usa.ipums.org/usa-action/variables/CONSPUMA#description_section) and [SEA](https://usa.ipums.org/usa-action/variables/SEA#description_section). You are correct that the best method is to link from SEA to county to county group to CONSPUMA, using the [available crosswalks](https://usa.ipums.org/usa/volii/tgeotools.shtml). Keep in mind that shifts in the official county boundaries between the sample years using SEA and the sample years using CONSPUMA could affect the comparability of these two variables.

Hope this helps.