docs(wildlife): cite the documented iNaturalist UTFGrid endpoint and Acartia's key request

/grid/{z}/{x}/{y}.grid.json is documented in the v1 and v2 API docs as
Grid Tiles UTFGrid; only its per-cell records are unspecified, which is
what the schema guard covers. DATA_SOURCES.md now also notes that
Acartia's README asks API users to create an account and an API key,
although /sightings/current answers without one today.

DATA_SOURCES.md

@@ -198,8 +198,8 @@ The optional Local ADS-B layer and the broadcast-FM receiver use radio you recei
 - **OSRM on the FOSSGIS routing servers.** Keyless (no API key). Every route is requested by a person: clicking A and B in the Directions layer, or a voice "route from A to B". The server-side `/api/route` proxy sends an identifying `User-Agent`, pins the upstream host, accepts 2-12 coordinates, rejects any leg over 600 km or a total over 2,500 km, caps the buffered response at 8 MB, times the upstream out at 12 s, rate-limits per client, caches each route for 10 minutes, and coalesces identical requests that are in flight at the same time. Turn-by-turn maneuvers are asked for only when a caller wants them (`steps=1`), so the callers that do not read them send the smaller request. The "fix the map" link the policy asks for is in the Data attribution popover beside the OpenStreetMap credit.
 - **FAA Special Use Airspace.** Keyless. `/api/drone-airspace` queries the public FAA AIS FeatureServer for prohibited (P) and restricted (R) zones only — not MOAs, TFRs or other SUA types — with simplified geometry, a body cap, paging, a one-hour cache and stale-on-error. The layer is US coverage, informational only, and is not a substitute for B4UFLY, LAANC or a preflight briefing. Data is fetched at request time and never stored or redistributed. US government public domain; courtesy attribution is registered in the Data attribution popover.
 - **iNaturalist.** Keyless. `/api/inaturalist/observations` returns cached random view samples (newest first globally), at most 200 per request. Recency uses observation time: the v1 `d1` filter and a rolling 48 h cutoff (whales 7 d); date-only rows qualify when their day starts within the window. Observation caches last 5 min (global 10 min), with stale fallback ≤1 h. `/api/inaturalist/grid` supplies density counts, cached 15 min. Both share a paced queue capped at 60/min and 8,000/day; only request counters persist in `.gev-cache/`. The server caches projected records, never raw responses. Private records are excluded; obscured coordinates become 0.2° cells. Observer identity is retained only for photo attribution. Eligible photos load directly from `inaturalist-open-data.s3.amazonaws.com`, with creator credit on ambient cards and creator/licence on selection. Per-record licences and noncommercial restrictions apply as listed above. Attribution appears in the layer row and Data attribution popover. Coverage follows community observations, not a census; Acartia adds Salish Sea marine mammals.
-- **iNaturalist grid (undocumented endpoint risk).** `/api/inaturalist/grid` shares observation-date, taxa, quality, pacing and budget rules with observations. A strict 64×64 UTFGrid schema guard fails closed; only logical-cell keys, counts and coordinates survive projection. Raw tiles, observation identifiers and free text are not retained. Projected tiles use a 400-entry LRU, 15-minute freshness and at most one hour of stale fallback. Views request at most six tiles; cached and adjacent-zoom coverage publishes before network waits, independently of observation pages. Cells supply a noninteractive density glow ranked within the view, from teal to amber with mono/CRT support. Every sighting badge comes from a real observation at its public position. Counts describe observations, not a population census. The endpoint is outside the documented v1 contract; schema drift disables grids until revalidated. See `docs/KNOWN-ISSUES.md`.
-- **Acartia.** Keyless. `/api/acartia/sightings` reads the current 7-day marine-mammal feed for ALL, MAMMALS and WHALES views intersecting 45.5–50.5° N, 126–121° W in the Salish Sea. WHALES accepts recognized cetaceans; other identified marine mammals appear under ALL/MAMMALS. The server rounds positions to 0.01° and drops comments before caching projected records (10 min fresh, stale ≤24 h); raw responses are not retained. Selected text cards credit the reporting provider under CC BY 4.0 and show Be Whale Wise guidance. Attribution also appears in the layer row and Data attribution popover. Opportunistic sightings, not a census.
+- **iNaturalist grid (cell schema risk).** `/api/inaturalist/grid` shares observation-date, taxa, quality, pacing and budget rules with observations. A strict 64×64 UTFGrid schema guard fails closed; only logical-cell keys, counts and coordinates survive projection. Raw tiles, observation identifiers and free text are not retained. Projected tiles use a 400-entry LRU, 15-minute freshness and at most one hour of stale fallback. Views request at most six tiles; cached and adjacent-zoom coverage publishes before network waits, independently of observation pages. Cells supply a noninteractive density glow ranked within the view, from teal to amber with mono/CRT support. Every sighting badge comes from a real observation at its public position. Counts describe observations, not a population census. The endpoint is documented in the v1 and v2 API docs as “Grid Tiles UTFGrid” (`/grid/{z}/{x}/{y}.grid.json`), but its per-cell records are not specified; schema drift disables grids until revalidated. See `docs/KNOWN-ISSUES.md`.
+- **Acartia.** Keyless. `/api/acartia/sightings` reads the current 7-day marine-mammal feed for ALL, MAMMALS and WHALES views intersecting 45.5–50.5° N, 126–121° W in the Salish Sea. WHALES accepts recognized cetaceans; other identified marine mammals appear under ALL/MAMMALS. The server rounds positions to 0.01° and drops comments before caching projected records (10 min fresh, stale ≤24 h); raw responses are not retained. Selected text cards credit the reporting provider under CC BY 4.0 and show Be Whale Wise guidance. `/sightings/current` answers without a key today, but Acartia's README asks API users to create an account and generate an API key on the [Acartia dashboard](https://acartia.io/) and to follow its [community guidelines](https://acartia.io/register). Attribution also appears in the layer row and Data attribution popover. Opportunistic sightings, not a census.
 - **Mapped installations.** OpenFreeMap military polygons use a bundled Overture/OSM name index; wide views show named points. Optional operator-configured Overpass and explicit Google Places searches keep their own source paths. Mapped data does not establish current activity or complete coverage.
 - **Place search.** Named-place fly-to uses Google Geocoding when a Maps key is configured, then Photon (`PHOTON_URL`; unset uses the public instance, empty disables it), then `/api/geocode` (Nominatim search) when neither answers. `/api/geocode` and the voice outline route `/api/geocode/outline` share one Nominatim queue (`NOMINATIM_URL`; unset, empty and invalid values disable it; an operator must explicitly select an authorized endpoint): one request at a time at least 1.1 s apart, an identifying `User-Agent` and `Referer`, a short queue that refuses a burst, a pause after 429/403/5xx answers (honouring `Retry-After` in full), at most one retry after a network failure, and a per-install daily cap on public-instance requests (`NOMINATIM_DAILY_CAP`, default 50). Processes using the same installation state file hold one lock through the actual fetch invocation and recording the next public start, with the daily slot persisted before invocation; restarts share that count, spacing and any pause. An unfinished dispatch marker fails closed until operator recovery; it is never automatically reclaimed. Public access fails closed if the state file cannot be read, locked, written or semantically validated. This coordination does not span independent installations or state directories and does not establish an application-wide public-service allowance or authorize public use. An operator-selected non-public endpoint is outside the public cap, spacing and durable-state requirement; an upstream cooldown is kept with the endpoint that returned it rather than leaking across operator URLs. Answers are cached on disk (outlines 90 days, places 30 days, no-results 24 hours); failures are not cached. Outlines are looked up only for an explicit ask, after bundled data and any configured Overpass, and only results whose type suits the ask are used. Administrative outline responses expose country/admin-1/admin-2 identity only when the selected Nominatim row has a recognized, unambiguous address type consistent with its own name; numeric rank, ambiguous types, missing fields and contradictory names do not manufacture identity. It is not used for systematic or bulk queries.
 - **Street and building outlines.** Voice street highlights, pointed-at buildings and grounds use the OpenFreeMap vector tiles the traffic layer already loads. Traffic and outlines share one bounded pending fetch/decode owner per immutable XYZ tile; materialized outline geometry is charged to the retained-byte ceiling and capped by coordinate count. Consumer result caches and request lifetimes remain independent, while eviction or explicit teardown cancels queued idle projections and releases their decoded owner. No Overpass request is made unless `OVERPASS_UPSTREAMS` is configured. Named grounds require a returned name matching the selected place, except that an ask whose head noun names a kind of grounds (a school, university or college, hospital, cemetery, stadium or zoo) may use the part of the smallest unnamed tile area of that class that holds the resolved place; a differently named area never answers. Other anonymous landcover polygons cannot establish identity, so unsupported grounds stay unavailable rather than borrowing a nearby POI name.

docs/CURRENT-STATE.md

@@ -160,7 +160,8 @@ adjacent-zoom tiles publish before network waits; each arriving tile replaces
 its covered area, including healthy empty tiles. Grid tiles publish even while
 the independent observation request is pending or failed. Enable waits for one
 camera settle; camera acquisition uses moveEnd with a 600 ms debounce. The
-undocumented UTFGrid endpoint has a schema guard; see `KNOWN-ISSUES.md`.
+documented UTFGrid endpoint's unspecified cell records have a schema guard;
+see `KNOWN-ISSUES.md`.
 
 Ambient cards use a fixed 96 px image width and a short creator name credit,
 with a bounded frame cache. New cards fill free screen regions; visible cards

docs/KNOWN-ISSUES.md

@@ -10,12 +10,14 @@ For the roadmap and open backlog, see the repository issue tracker.
 
 ## Open
 
-### Wildlife grid is an undocumented iNaturalist endpoint
+### Wildlife grid relies on the iNaturalist UTFGrid cell schema
 
 Status: Open (guarded fallback)
 
-The operational `/v1/grid/{z}/{x}/{y}.grid.json` endpoint is not part of the
-published v1 Swagger contract. Its 64×64 UTFGrid shape, keys and cell records
+The `/v1/grid/{z}/{x}/{y}.grid.json` endpoint is documented in the v1 and v2
+API docs (“Grid Tiles UTFGrid”), but the documented response only defines the
+UTFGrid `grid`, `keys` and `data` members; the per-cell records are not
+specified. Its 64×64 UTFGrid shape, keys and cell records
 are validated in full at the allow-list proxy. A schema change or unavailable
 tile retains its last good cells for at most one hour; a cold unavailable grid
 uses sampled observations with the same badges and screen buckets, without

src/layers/wildlifeSightings/docs.test.mjs

@@ -109,3 +109,21 @@ test('Wildlife docs describe one source link, name declutter and globe glow limi
   assert.match(section, /5% radius margin/);
   assert.match(section, /add no per-frame work/);
 });
+
+test('Wildlife docs cite the documented UTFGrid endpoint and the Acartia key request', () => {
+  for (const path of [
+    'docs/KNOWN-ISSUES.md',
+    'DATA_SOURCES.md',
+    'docs/CURRENT-STATE.md',
+  ]) {
+    const text = read(path);
+    assert.doesNotMatch(text, /undocumented (iNaturalist|UTFGrid) endpoint/i);
+    assert.doesNotMatch(text, /grid \(undocumented/i);
+  }
+  for (const path of ['docs/KNOWN-ISSUES.md', 'DATA_SOURCES.md'])
+    assert.match(read(path), /Grid Tiles UTFGrid/);
+  assert.match(
+    read('DATA_SOURCES.md'),
+    /create an account and generate an API key/,
+  );
+});