Convert post meta to custom taxonomy?

You will need to write some code for this I think.
Start creating the new taxonomies and the query the right custom field to get the list of values.
Use wp_insert_term() to add the new term.
Then use wp_set_post_terms() to assign the terms to each post.

Related Posts:

  1. Is it possible to sort the post based on a custom field?
  2. How to separate posts in loop?
  3. Count tags for current post and save into custom meta field (and update it on post edit)
  4. Is it possible to sort the post based on a custom field?
  5. How can I show custom field according to taxonomy?
  6. Advanced search form with filters for custom taxonomies and custom fields
  7. Is ACF being a honey trap? [closed]
  8. Add custom taxonomy fields when creating a new taxonomy
  9. WordPress database error: [Not unique table/alias: ‘wp_postmeta’]
  10. How to modify the query in taxonomy-custom.php to sort term archives by a custom meta field?
  11. Get value in custom field with taxonomy [closed]
  12. How much faster is a tax query than a meta query?
  13. Remove Category description textarea
  14. Use custom posts as taxonomy term meta replacement?
  15. Custom metabox for menu administration page?
  16. Custom Fields and performance
  17. register_rest_field for custom taxonomy fields that are assosiated with custom post type
  18. Custom taxonomy – custom sortable column
  19. How to display submenus on page based on referring top-level parent?
  20. List Custom Taxonomy Values according to a Post Meta Value
  21. How get custom field from custom taxonomy?
  22. Automatically assign taxonomy term if custom meta value exists
  23. How to add custom field to custom taxonomy in 4.4
  24. how to search in custom fields & custom taxonomy for custom search
  25. Getting yoast title for custom taxonomy
  26. Outputting an array of term meta values in a custom WooCommerce tab?
  27. Storing data into custom taxonomies VS post custom fields (post meta)
  28. get_the_terms() to show all custom taxonomies
  29. List the number of posts for each custom taxonomy and specific custom field value
  30. Single reusable value for post meta: Custom Taxonomy or Post Meta?
  31. Solve product properties with custom taxonomies?
  32. Is it acceptable to build functionality into a theme built for a client? [closed]
  33. $wpdb query a post type within a specific taxonomy term while ordering posts by custom meta value?
  34. Custom fields to taxonomy
  35. Custom fields ‘for’ custom taxonomy?? Can someone explain why?
  36. Print terms with taxonomy and metabox value
  37. Styling Taxonomy Terms Individually
  38. Can I use a Custom Meta Value inside of ‘get_the_terms’?
  39. How to add contents of a custom field to a taxonomy term list?
  40. How can I hide admin columns showing extra custom taxonomy fields?
  41. Conditional display for custom fields/taxonomy
  42. How do I modify the “Insert Media” lightbox in the admin to only show media items from a category?
  43. What is faster: custom taxonomy or serialized post-meta for db retrieval? (over 60,000 posts)
  44. I am trying to display information from a custom table from my wordpress users pages
  45. Is it possible to store Json data in post_meta and manipulate
  46. Save custom taxonomy data in different table not in wp_options for my own plugin
  47. Add Custom Taxonomy for Blog Meta Info
  48. How to create a dependent drop-down and options in dropdown must be manageable from admin panel
  49. Search Tool only refreshes Page without showing results
  50. Display value of custom field of custom taxonomy in single post?
  51. Creating terms vs custom post meta to save data?
  52. Removing “s” from search with custom parameters
  53. How to fetch the data from Advanced Custom post when we search specific keyword or field name related to the post?
  54. How do I display a custom field from a custom taxonomy in single.php?
  55. Multi-select field for Taxonomy can’t save the value
  56. Does using custom taxonomy is more CPU efficient than using meta_data?
  57. WordPress implode & wp_insert_post question
  58. how to store values in database at hierarchical view
  59. Best structure for entering recipes in a WordPress theme?
  60. WP REST API – get custom taxonomies based on terms & filter
  61. wp_query not resetting, last post hanging
  62. Copy/clone/associate Custom field to Custom Taxonomy
  63. saving meta/custom field to tag
  64. How to support fifteen thousand terms in WordPress?
  65. Different Taxonomy Values for Each Post
  66. Filter through custom taxonomy with an array of taxonomy IDs
  67. What’s the best way to add taxonomy’s image in 2017?
  68. Loop through custom taxanomy in post and display custom fields from posts
  69. Count of posts by different parameters?
  70. Why can’t I access Custom Taxonomy metadata?
  71. WooCommerce custom taxonomy as meta?
  72. SQL / wp_update_post: change post custom field to CPT post taxonomy
  73. Filter by Custom Taxonomy AND Custom Field
  74. Can You Build Page Templates Without Extra Files
  75. Extra Meta Data for WordPress Multisite Taxonomy
  76. Taxonomy or Custom Field
  77. Sort taxonomy page alphabetically by meta rather than default post date
  78. Is there a way to nest taxonomies or custom fields deeper than one level below the post type?
  79. Custom Post Type meta data getting deleted on bulk editing taxonomies
  80. How to use custom slug and custom templates for custom taxonomy?
  81. Create multiple taxonomies with custom fields values on the fly when creating new posts
  82. Custom field with terms from another taxonomy programmatically
  83. Create new Taxonomy, add extra fields, register terms AND extra fields values?
  84. Dropdown (with onChange) with custom taxonomies
  85. ACF – Get unique values of array
  86. Remove Custom metabox from particular page template is used
  87. ACF Custom field not showing in Timber Taxonomy page
  88. Pre_get_post custom taxonomy combined with custom fields?
  89. Adding a checkbox field to a (custom) taxonomy
  90. Add and Custom category for posts “PAGE”
  91. Reset custom taxonomy meta data after saving
  92. how to filter the data’s comparison operators (>= &
  93. How to add meta fields to custom taxonomy add/edit page?
  94. How to filter a taxonomy meta field to the ‘single_term_title’ filter hook
  95. Custom post type term names with ampersand in the term name
  96. sort Posts by custom user filed
  97. Looking for suggestions on creating simple database (Help!!)
  98. get meta fields and taxonomy of any post type
  99. Where to put a migration script to switch post information?
  100. Register custom taxonomy from a Advenced custom field option page