import json, collections
p='.scratch/cockpit-real-data-wayfinding/verify/artifacts/t67/geom-none.json'
with open(p,encoding='utf-8') as f: d=json.load(f)
print('top keys:', list(d.keys()))
data=d.get('data',d)
print('data keys:', list(data.keys()))
feats=data.get('features') or []
print('features:', len(feats))
keycount=collections.Counter()
for ft in feats:
    props=ft.get('properties') or {}
    keycount.update(props.keys())
for k,v in keycount.most_common(60):
    print(f'  {k}: appears in {v} features')
# look for district-ish keys
print()
print('district-ish values sample:')
for ft in feats[:3]:
    props=ft.get('properties') or {}
    print({k:props[k] for k in props if 'dist' in k.lower() or 'area' in k.lower() or 'region' in k.lower()})
print()
print('coverage:', json.dumps(data.get('coverage'), ensure_ascii=False)[:600])
print('sample props:', json.dumps((feats[0].get('properties') or {}), ensure_ascii=False)[:900])