NaNoBotCo/mot-dang-chiang-mai-chiang-rai

มดแดง Mot Dang — Chiang Mai & Chiang Rai city directory

88,161 places in and around Chiang Mai (62,772) and Chiang Rai (25,389), in Thai and English, with coordinates, categories, opening hours, and the channels a place actually answers on — phone, LINE, Facebook, a website that still resolves.

The name is มดแดง, mot daeng, the red ant: the thing that knows every soi because it has walked all of them. That is the ambition. The directory exists because mainstream mapping is thin here in ways that matter — a clinic with no hours, a market under a name nobody local uses, a wat with the wrong spelling and no Thai at all — and thin data is worst for the person who most needs it to be good.

Live at https://motdang.net/ · built 2026-09-08

If you want to ask it questions instead of holding it

This snapshot is the whole corpus as typed columns. If what you actually want is the clinics open right now within two kilometres, there is a live public API over the same records — no key, no sign-up, open to every origin, same licence:

• https://motdang.net/api/ — documentation
• GET https://motdang.net/api/v1/places?cat=medical&near=18.7883,98.9853&radius=2000&open_now=1
• https://motdang.net/api/v1/openapi.json — the spec
• https://motdang.net/api/v1/schema.json — the key contract; v1 keys may be added to
• https://motdang.net/terms.html — the terms, which are: take it, credit มดแดง Mot Dang

Read openNow: null as UNKNOWN and never as closed, exactly as the hours column here is empty rather than false where nobody holds the hours.

What is in a row

field	type	what it is
id	string	stable identifier
url	string	the place's own page on motdang.net
province	string	cm (Chiang Mai) or cr (Chiang Rai)
name name_th name_en	string	as called on the ground; Thai is primary
categories subcategories	list[string]	see the table below
lat lng	float	null where the place is known but not yet pinned
geo_precision	string	exact, block, approx, needs-pin
address phone website hours	string	hours in OSM syntax (Mo-Sa 09:00-17:30)
channels	list[{kind, value}]	phone, web, facebook, instagram, email, line, whatsapp
ant_rank ant_max ant_bits	int, int, list	completeness — see below
featured landmark	bool	editorial flags
blurb_th blurb_en	string	written where a place needed explaining
confidence	string	curated, field, crawled, third-party
source_types sources	list	where the RECORD came from, with fetch dates
provenance	string (JSON)	where each FIELD came from — see below
fields_stated fields_derived	list[string]	the same table, split so you can filter on it
osm_derived	bool	true = this row carries ODbL. See Licence
attrs	string (JSON)	101 possible keys; a wat has watCode, a shop has cuisine
updated_at	string	ISO date

attrs is a JSON string rather than a column per key, because the key set is wide and sparse — a temple's register code and a noodle shop's wifi fee do not belong in the same schema. Parse it if you need it.

Ant rank

Nine things make a listing useful to someone standing in the street holding a phone. Each one present earns an ant. The count is the whole scoring system — no weighting, no secret sauce, nothing an owner cannot read off the page and go fix themselves:

Thai name · English name · phone · LINE · opening hours · a website that still answers · a photo · owner-confirmed · recently walked (within 180 days).

ant_bits lists which of the nine this record has, so you can filter on the specific gap rather than the total.

ant rank	places
9/9	0
8/9	0
7/9	7
6/9	1,269
5/9	768
4/9	15,288
3/9	44,419
2/9	20,845
1/9	5,565
0/9	0

A low rank is a to-do, not a judgement. Most of the corpus came off the map and has never been walked.

Categories

category	places
food	26,984
hotel	8,526
essentials	6,931
repair	5,467
shopping	5,036
school	4,703
business	4,561
transport	4,433
medical	3,902
wat	3,373
beauty	2,576
sights	2,185
community	2,140
realestate	1,680
market	1,400
massage	1,317
sport	916
parks	670
pets	654
cannabis	615
whats-on	401
tattoo	376
museums-galleries	330
home-services	116
muaythai	40
school-intl	37
chang	30
cooking	25

Where it came from

confidence	meaning
crawled	from OpenStreetMap, unwalked
third-party	from a public directory, credited in sources
curated	written or corrected by hand against a source
field	someone stood in front of it

16,944 of 88,161 rows are OSM-derived. 87,573 have coordinates; the rest are known to exist but not yet pinned, and are marked needs-pin rather than dropped — a clinic you cannot yet put on a map is still a clinic.

Per-field provenance

sources says where a record came from. On a record with four sources that does not tell you which one gave the phone number, so 75,318 of the 88,161 rows also carry provenance: a table keyed by field name.

{"phone":   {"source": "directory:overture", "how": "stated",  "at": "2026-09-07"},
 "address": {"source": "derived:address-parse", "how": "derived"},
 "lat":     {"source": "osm:mot-dang overpass", "how": "stated"}}

how is the part worth filtering on. stated — a source asserted this value (365,944 fields). derived — we computed it from something else, such as an address parsed into road and tambon, or a pin geocoded from a written address (174,258 fields). fields_stated and fields_derived carry the same split as plain lists.

A field absent from the table has unknown provenance. It does not mean ours and it does not mean OSM. Most first-hand and curated fields predate the receipt system and are simply not stamped yet; the table is a floor, not a census.

Known limits

• Coverage is uneven by design. Food and lodging are dense because that is what gets mapped; repair shops, community groups and home services are thin because they are not.
• Most of it is unwalked. confidence: crawled means the map said so and nobody has been to check. Opening hours especially go stale.
• Prices are not in this dataset. Where the site shows a price it is stamped with when it was seen, and that belongs on the page, not in a column that would be wrong within a season.
• Photos are not here — only external references, by URL, in attrs.
• This is a directory, not a review site. There are no ratings and no ranking by quality, only by completeness of the record.

Licence

Dual, and the split is mechanical — filter on osm_derived:

• The compilation — selection, categories, ant rank, blurbs, field-collected fields, and the arrangement: CC BY 4.0.
• Map-derived fields, on rows where osm_derived = true: © OpenStreetMap contributors, ODbL 1.0. ODbL is share-alike on the database — publish a derived database from these rows and that database carries ODbL too.

Data on this page is CC BY 4.0 — reuse it, train on it, quote it. Map-derived fields remain © OpenStreetMap contributors (ODbL). Attribution to motdang.net is all we ask.

Full text in LICENSE.

Citation

@misc{motdang2026,
  title  = {{มดแดง Mot Dang: a Chiang Mai and Chiang Rai city directory}},
  author = {{Mot Dang}},
  year   = {2026},
  url    = {https://motdang.net/},
  note   = {88,161 places, built 2026-09-08}
}

Also served directly

• https://motdang.net/llms.txt — what the site is, for a machine arriving cold
• https://motdang.net/llms-full.txt — the same 88,161 places as plain lines, one each
• Corrections: every page has a door. If a row here is wrong, the fix goes in at the source and lands in the next build.