From db89c4e2b7163ebe01f05e74983a373dafbf0058 Mon Sep 17 00:00:00 2001
From: Sean Morley <mail@seanmorley.com>
Date: Sun, 4 Jan 2026 15:32:29 -0500
Subject: [PATCH] feat: update extractIsoCode function to include additional
 ISO3166 levels for improved region matching

---
 backend/server/adventures/geocoding.py | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/backend/server/adventures/geocoding.py b/backend/server/adventures/geocoding.py
index 32082792..d5118fc6 100644
--- a/backend/server/adventures/geocoding.py
+++ b/backend/server/adventures/geocoding.py
@@ -159,6 +159,9 @@ def extractIsoCode(user, data):
     # France gets lvl4 (regions) first for city matching, then lvl6 (departments) as a fallback.
     preferred_iso_keys = (
         [
+            "ISO3166-2-lvl10",
+            "ISO3166-2-lvl9",
+            "ISO3166-2-lvl8",
             "ISO3166-2-lvl4",
             "ISO3166-2-lvl6",
             "ISO3166-2-lvl7",
@@ -170,10 +173,13 @@ def extractIsoCode(user, data):
         ]
         if country_code == "FR"
         else [
+            "ISO3166-2-lvl10",
+            "ISO3166-2-lvl9",
+            "ISO3166-2-lvl8",
+            "ISO3166-2-lvl4",
             "ISO3166-2-lvl7",
             "ISO3166-2-lvl6",
             "ISO3166-2-lvl5",
-            "ISO3166-2-lvl4",
             "ISO3166-2-lvl3",
             "ISO3166-2-lvl2",
             "ISO3166-2-lvl1",