feat: search-engine indexing — robots.txt, sitemap.xml, llms.txt, SEO meta

robots.txt (sitemap pointer, /metrics and /scrape/ disallowed), sitemap.xml (/ and /docs), and llms.txt (site + API summary for LLM crawlers) served at the domain root. Dashboard head gains title with keywords, meta description, canonical, Open Graph/Twitter tags, schema.org WebApplication JSON-LD, theme-color, and an inline SVG favicon (also silences the /favicon.ico 404).
2026-08-11 16:33:44 +07:00
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+# Ping River Live Monitor
+
+> Live water levels, discharge, rainfall and machine-learning flood forecasts for
+> the Ping River basin in Northern Thailand, centered on Chiang Mai (gauge P.1,
+> Nawarat Bridge). Open-source, hourly data since 2018, operated by B4L
+> (https://buildfor.life).
+
+Flood context: Chiang Mai city flooding begins when P.1 reaches 3.70 m
+(official inundation stage 1); the record peak was 5.30 m on 2024-10-05.
+
+## Data
+
+- Hourly water level (m) and discharge (m³/s) from 16 Royal Irrigation
+  Department (RID) telemetry gauges in the Ping basin, 2018-present.
+- Hourly rainfall and water level for 400+ ThaiWater/HII stations (Ping basin),
+  including historical water levels back to 2019.
+- ML flood-risk forecasts (probability of warning/danger level within 6/12/24 h)
+  per station, plus Chiang Mai inundation-stage probabilities.
+
+## API (no key required)
+
+- https://water.buildfor.life/docs : interactive OpenAPI reference
+- /stations : station metadata (code, names, coordinates)
+- /measurements/latest?limit=N : latest readings
+- /measurements/history/{station_code}?hours=N or ?start=YYYY-MM-DD&end=YYYY-MM-DD : history
+- /forecast : flood-risk forecasts for all stations
+- /api/stats : database coverage statistics
+- /api/hii/rainfall/latest : latest rainfall per ThaiWater/HII station
+- /api/hii/waterlevel/latest : latest water level per ThaiWater/HII station (m MSL)
+
+## Source
+
+- https://git.b4l.co.th/B4L/Northern-Thailand-Ping-River-Monitor : code, docs,
+  and the full data-source catalog (docs/DATA_SOURCES.md).