Wikidata:Property proposal/ODOT county code

Description	three-letter identifier assigned to a county in Ohio by the Ohio Department of Transportation for road inventory and traffic management
Represents	ODOT county code (Q108558733)
Data type	External identifier
Domain	county of Ohio (Q13414759)
Allowed values	`[A-Z]{3}`
Example 1	Champaign County (Q389573) → `CHP`
Example 2	Cuyahoga County (Q251267) → `CUY`
Example 3	Hamilton County (Q152891) → `HAM`
Example 4	Morrow County (Q487280) → `MRW`
Source	https://www.transportation.ohio.gov/static/Programs/TechServices/roadway-information-manual/Appendix_A.pdf
Planned use	Add to all 88 counties
Number of IDs in source	88
Expected completeness	eventually complete (Q21873974)
See also	FIPS 6-4 (P882), HASC (P8119)
Applicable "stated in"-value	Roadway Information Manual (Q108569788)
Distinct-values constraint	yes

The Ohio Department of Transportation uses these three-letter county codes extensively, including on mile markers. Within Ohio, they are analogous to FIPS 6-4 county codes. They also maintain ODOT township number (Q108569676) and ODOT municipal number (Q108569694), but those numbers are more obscure. – Minh Nguyễn ^💬 06:05, 17 September 2021 (UTC)[reply]

Comment I changed datatype to external-id given the proposed distinct and single value constraints. --- Jura 05:53, 20 September 2021 (UTC)[reply]
Comment Would it be possible to use the regex-matching property constraint to prefix with county:, township:, or municipality:? Or would that be counterproductive? Arlo Barnes (talk) 12:00, 11 October 2021 (UTC)[reply]
Comment 88 seems a rather small number for usage of a Wikidata property. Could you handle this with something else, like simply code (P3295)? ArthurPSmith (talk) 17:31, 11 October 2021 (UTC)[reply]
If the code is combined with the township and municipal numbers, then there would be 1,697 IDs. I think the county can be combined with the township or municipal number in the form "ABC-12", but I'm not certain about that. Minh Nguyễn ^💬 06:50, 1 November 2021 (UTC)[reply]
- Geocodes are usually in such numbers, see e.g. P:P2585 with 32. Rather than having thousands of nearly identical ones for countries, maybe it's better to collect more specific ones. --- Jura 16:29, 9 November 2021 (UTC)[reply]
Support seems reasonable to me Germartin1 (talk) 23:18, 3 December 2021 (UTC)[reply]