Data field · Event

High-water-mark quality

The source-reported quality class and positional tolerance of a high-water mark; scale, direction, thresholds, survey date and methodology must accompany use.

Who carries it ↓

1Data sources

1Providers

1Free to access

Sources that carry it

1 source

U.S. Geological Survey

USGS Short-Term Network Web Services

Public REST services behind the USGS Short-Term Network and Flood Event Viewer. The API supports event, site, and location-based retrieval of high-water marks and returns event/site identifiers, coordinates, flag and survey dates, surveyed elevation, vertical datum, mark quality, height above ground, and riverine/coastal environment.

Free API National US 12 fields

Questions it helps answer

Flood inundation during the event Parcel flood inundation history

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